Morning Rounds \u00b7 Neonatal Respiratory Distress<\/title>\n<link href=\"https:\/\/fonts.googleapis.com\/css2?family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400;1,600&family=Source+Serif+4:ital,wght@0,300;0,400;0,600;1,400&display=swap\" rel=\"stylesheet\">\n<style>\n#mrq01 *,#mrq01 *::before,#mrq01 *::after{box-sizing:border-box;margin:0;padding:0}\n#mrq01{\n --ter:#8B3A3A;\n --ter-light:#A85050;\n --ter-pale:#F9EDED;\n --ter-dark:#5C1E1E;\n --correct:#2D6B47;--correct-bg:#EAF6EF;--correct-border:#3A9960;\n --wrong:#B83232;--wrong-bg:#FDF0F0;--wrong-border:#E53935;\n --ink:#2A1010;--ink-mid:#5A3030;--ink-soft:#9A7070;\n --line:#EDD8D8;--cream:#FDF4F4;--warm:#FFFAFA;\n font-family:'Source Serif 4',Georgia,serif;\n font-size:16px;color:var(--ink);background:var(--cream);\n line-height:1.7;padding:0 0 64px;\n}\n#mrq01 .mr-header{background:var(--ter);color:#FFFAFA;padding:34px 24px 28px;text-align:center}\n#mrq01 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style=\"width:100%;max-width:660px;display:block;margin:0 auto\" aria-label=\"Neonatal respiratory distress differential comparison\">\n\n \n <rect width=\"660\" height=\"210\" rx=\"6\" fill=\"#FFFAFA\"\/>\n\n \n <rect x=\"8\" y=\"8\" width=\"148\" height=\"28\" rx=\"4\" fill=\"#E8C0C0\"\/>\n <rect x=\"166\" y=\"8\" width=\"148\" height=\"28\" rx=\"4\" fill=\"#C97A7A\"\/>\n <rect x=\"324\" y=\"8\" width=\"148\" height=\"28\" rx=\"4\" fill=\"#8B3A3A\"\/>\n <rect x=\"482\" y=\"8\" width=\"170\" height=\"28\" rx=\"4\" fill=\"#5C1E1E\"\/>\n\n <text x=\"82\" y=\"27\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"11\" font-weight=\"700\" fill=\"#5C1E1E\">RDS<\/text>\n <text x=\"240\" y=\"27\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"11\" font-weight=\"700\" fill=\"#FFFAFA\">TTN<\/text>\n <text x=\"398\" y=\"27\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"11\" font-weight=\"700\" fill=\"#FFFAFA\">MAS<\/text>\n <text x=\"567\" y=\"27\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"11\" font-weight=\"700\" fill=\"#FFFAFA\">Pneumothorax<\/text>\n\n \n <rect x=\"0\" y=\"44\" width=\"660\" height=\"28\" fill=\"#FDF4F4\"\/>\n <rect x=\"0\" y=\"72\" width=\"660\" height=\"28\" fill=\"#FFFAFA\"\/>\n <rect x=\"0\" y=\"100\" width=\"660\" height=\"28\" fill=\"#FDF4F4\"\/>\n <rect x=\"0\" y=\"128\" width=\"660\" height=\"28\" fill=\"#FFFAFA\"\/>\n <rect x=\"0\" y=\"156\" width=\"660\" height=\"28\" fill=\"#FDF4F4\"\/>\n <rect x=\"0\" y=\"184\" width=\"660\" height=\"28\" fill=\"#FFFAFA\"\/>\n\n \n <text x=\"6\" y=\"63\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"9\" font-weight=\"700\" fill=\"#9A7070\">Gestation<\/text>\n <text x=\"6\" y=\"91\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"9\" font-weight=\"700\" fill=\"#9A7070\">Onset<\/text>\n <text x=\"6\" y=\"119\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"9\" font-weight=\"700\" fill=\"#9A7070\">CXR clue<\/text>\n <text x=\"6\" y=\"147\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"9\" font-weight=\"700\" fill=\"#9A7070\">Mechanism<\/text>\n <text x=\"6\" y=\"175\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"9\" font-weight=\"700\" fill=\"#9A7070\">Treatment<\/text>\n <text x=\"6\" y=\"203\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"9\" font-weight=\"700\" fill=\"#9A7070\">Course<\/text>\n\n \n <text x=\"82\" y=\"63\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Preterm <34 wk<\/text>\n <text x=\"82\" y=\"91\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Birth \u2192 4 h<\/text>\n <text x=\"82\" y=\"112\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Ground-glass +<\/text>\n <text x=\"82\" y=\"124\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">air bronchogram<\/text>\n <text x=\"82\" y=\"147\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">\u2193 Surfactant<\/text>\n <text x=\"82\" y=\"175\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Surfactant + CPAP<\/text>\n <text x=\"82\" y=\"203\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Worsens 48\u201372 h<\/text>\n\n \n <text x=\"240\" y=\"63\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Near\/full term<\/text>\n <text x=\"240\" y=\"91\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Birth \u2192 6 h<\/text>\n <text x=\"240\" y=\"112\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Perihilar streaking,<\/text>\n <text x=\"240\" y=\"124\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">fluid in fissures<\/text>\n <text x=\"240\" y=\"147\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Delayed fluid resorption<\/text>\n <text x=\"240\" y=\"175\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Supportive only<\/text>\n <text x=\"240\" y=\"203\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Resolves 24\u201348 h<\/text>\n\n \n <text x=\"398\" y=\"63\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Post-term \/ term<\/text>\n <text x=\"398\" y=\"91\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Immediate<\/text>\n <text x=\"398\" y=\"112\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Coarse patches +<\/text>\n <text x=\"398\" y=\"124\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">hyperinflation<\/text>\n <text x=\"398\" y=\"147\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Airway obstruction<\/text>\n <text x=\"398\" y=\"175\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Suction + support<\/text>\n <text x=\"398\" y=\"203\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Variable; risk PPHN<\/text>\n\n \n <text x=\"567\" y=\"63\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Any gestation<\/text>\n <text x=\"567\" y=\"91\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Sudden, any time<\/text>\n <text x=\"567\" y=\"112\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Absent BS; tracheal<\/text>\n <text x=\"567\" y=\"124\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">deviation (tension)<\/text>\n <text x=\"567\" y=\"147\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Air leak syndrome<\/text>\n <text x=\"567\" y=\"175\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Needle \/ chest drain<\/text>\n <text x=\"567\" y=\"203\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Emergency if tension<\/text>\n\n \n <line x1=\"156\" y1=\"8\" x2=\"156\" y2=\"210\" stroke=\"#EDD8D8\" stroke-width=\"1\"\/>\n <line x1=\"314\" y1=\"8\" x2=\"314\" y2=\"210\" stroke=\"#EDD8D8\" stroke-width=\"1\"\/>\n <line x1=\"472\" y1=\"8\" x2=\"472\" y2=\"210\" stroke=\"#EDD8D8\" stroke-width=\"1\"\/>\n \n <line x1=\"0\" y1=\"44\" x2=\"660\" y2=\"44\" stroke=\"#EDD8D8\" stroke-width=\"0.5\"\/>\n <line x1=\"0\" y1=\"72\" x2=\"660\" y2=\"72\" stroke=\"#EDD8D8\" stroke-width=\"0.5\"\/>\n <line x1=\"0\" y1=\"100\" x2=\"660\" y2=\"100\" stroke=\"#EDD8D8\" stroke-width=\"0.5\"\/>\n <line x1=\"0\" y1=\"128\" x2=\"660\" y2=\"128\" stroke=\"#EDD8D8\" stroke-width=\"0.5\"\/>\n <line x1=\"0\" y1=\"156\" x2=\"660\" y2=\"156\" stroke=\"#EDD8D8\" stroke-width=\"0.5\"\/>\n <line x1=\"0\" y1=\"184\" x2=\"660\" y2=\"184\" stroke=\"#EDD8D8\" stroke-width=\"0.5\"\/>\n <\/svg>\n <figcaption>\n Four causes of neonatal respiratory distress \u2014 key discriminators.\n <strong>RDS<\/strong>: preterm, ground-glass CXR, worsening over 48\u201372 h \u2014 treat with surfactant + CPAP.\n <strong>TTN<\/strong>: near-term elective LSCS, wet-lung CXR, self-resolves within 48 h.\n <strong>MAS<\/strong>: meconium-stained liquor, barrel-chest hyperinflation, risk of PPHN.\n <strong>Pneumothorax<\/strong>: sudden deterioration on PPV\/CPAP, absent breath sounds, tracheal deviation \u2014 needle decompression is life-saving.\n Grunting \u00b7 Flaring \u00b7 Retracting are common to all four; the discriminators are <em>context, gestation, and CXR<\/em>.\n <\/figcaption>\n <\/figure>\n<\/div>\n\n\n\n<div id=\"mrq01\">\n\n <div class=\"mr-header\">\n <div class=\"mr-eyebrow\">Morning Rounds \u00b7 Neonatology Series<\/div>\n <div class=\"mr-title\">\n Neonatal Respiratory Distress<br><em>Clinical Reasoning<\/em>\n <\/div>\n <div class=\"mr-subtitle\">Five cases · Read carefully · Trust your instinct<\/div>\n <div class=\"mr-chips\">\n <span class=\"mr-chip\">5 Cases<\/span>\n <span class=\"mr-chip\">+4 \/ −1 scoring<\/span>\n <span class=\"mr-chip\">Options reshuffled<\/span>\n 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<span class=\"mr-band mr-band-w\" id=\"mrq01-ct-w\"><\/span>\n <span class=\"mr-band mr-band-s\" id=\"mrq01-ct-s\"><\/span>\n <\/div>\n <button class=\"mr-retry\" id=\"mrq01-retry\">↻ New Round<\/button>\n <\/div>\n <\/div>\n\n <\/div>\n<\/div>\n\n\n<script>\n(function () {\n 'use strict';\n\n var NS = 'mrq01';\n var TOTAL = 5;\n var MAX = 20;\n var LTRS = ['A','B','C','D'];\n\n \/* \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\n QUESTION BANK\n \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550 *\/\n var QS = [\n\n {\n id: 1,\n tag: 'Respiratory Distress Syndrome — Pathophysiology & Treatment',\n stem: 'A neonate is born at <strong>29 weeks gestation<\/strong> by emergency caesarean section for antepartum haemorrhage. The mother received <em>no antenatal corticosteroids<\/em>. Within 30 minutes of birth the baby develops <strong>grunting, nasal flaring, and intercostal recession<\/strong> with an oxygen requirement of 55%. Chest X-ray shows <strong>bilateral ground-glass opacification with air bronchograms<\/strong>. Which statement best describes the pathophysiology and correct management?',\n correct: 'Surfactant deficiency causes alveolar collapse and V\/Q mismatch; intratracheal surfactant plus CPAP is first-line treatment',\n opts: [\n 'Surfactant deficiency causes alveolar collapse and V\/Q mismatch; intratracheal surfactant plus CPAP is first-line treatment',\n 'Meconium aspiration causes airway obstruction; bronchoscopic lavage should be performed urgently',\n 'Transient tachypnoea of the newborn from retained lung fluid is the diagnosis; it resolves within 6 hours without surfactant',\n 'Group B streptococcal pneumonia is most likely; surfactant is contraindicated until infection is treated'\n ],\n exp: '<strong>Respiratory Distress Syndrome (RDS)<\/strong> is caused by deficiency of pulmonary surfactant (primarily dipalmitoyl phosphatidylcholine), resulting in high alveolar surface tension, diffuse atelectasis, and right-to-left shunting. It is the commonest cause of respiratory distress in preterm neonates; incidence is inversely proportional to gestational age. <strong>Antenatal corticosteroids<\/strong> (betamethasone ≥24 hours before delivery) are the most effective preventive measure. Postnatal treatment is <strong>exogenous surfactant via endotracheal tube<\/strong> combined with <strong>CPAP<\/strong> to maintain functional residual capacity. The ground-glass appearance with air bronchograms on CXR is pathognomonic.',\n imgId: 'mrq01-img1'\n },\n\n {\n id: 2,\n tag: 'Transient Tachypnoea of the Newborn — Diagnosis',\n stem: 'A <strong>3.8 kg male<\/strong> is born at <strong>38 weeks<\/strong> by <em>elective LSCS without labour<\/em> to a G2P1 mother with no obstetric complications. Within 2 hours of birth he develops <strong>tachypnoea (RR 74\/min)<\/strong>, mild subcostal retractions, and intermittent grunting. SpO² is 93% on room air. Chest X-ray shows <strong>prominent perihilar streaking and fluid in the right horizontal fissure<\/strong>. By 40 hours of life he is breathing normally on room air. What was the most likely diagnosis?',\n correct: 'Transient Tachypnoea of the Newborn (TTN) \u2014 delayed resorption of fetal lung fluid due to absence of labour',\n opts: [\n 'Transient Tachypnoea of the Newborn (TTN) \u2014 delayed resorption of fetal lung fluid due to absence of labour',\n 'Respiratory Distress Syndrome \u2014 surfactant deficiency causing alveolar collapse',\n 'Meconium Aspiration Syndrome \u2014 chemical pneumonitis from inhaled meconium',\n 'Congenital pneumonia \u2014 vertical transmission of Group B Streptococcus'\n ],\n exp: '<strong>TTN<\/strong> is the classic “wet lung” of the near-term infant born by <strong>elective LSCS without labour<\/strong>. During labour, catecholamine surges and thoracic compression activate epithelial Na&sup+; channels that reabsorb fetal lung fluid; elective LSCS bypasses this mechanism. Key discriminators: near\/full-term gestation, elective LSCS, wet-lung CXR (perihilar streaking, fissure fluid), and <strong>spontaneous resolution within 24–48 hours<\/strong>. RDS would worsen rather than resolve in 36–40 h. MAS requires meconium-stained liquor. Congenital pneumonia would show focal consolidation with a systemically unwell neonate. Management of TTN is purely supportive — supplemental oxygen as needed.',\n imgId: null\n },\n\n {\n id: 3,\n tag: 'Meconium Aspiration Syndrome — Complication',\n stem: 'A term male is delivered at <strong>41+3 weeks<\/strong> after prolonged labour. The liquor was <strong>thick meconium-stained<\/strong>. At birth the infant was limp and apnoeic; after initial resuscitation he remains in respiratory distress with SpO² of 78% on 70% oxygen. CXR shows <strong>bilateral coarse patchy opacities with hyperinflation<\/strong> and a flattened diaphragm. Echocardiography reveals <strong>right-to-left shunting at the ductus arteriosus<\/strong>. Which complication does the echocardiography finding indicate?',\n correct: 'Persistent Pulmonary Hypertension of the Newborn (PPHN) \u2014 failure of pulmonary vascular resistance to fall after birth',\n opts: [\n 'Persistent Pulmonary Hypertension of the Newborn (PPHN) \u2014 failure of pulmonary vascular resistance to fall after birth',\n 'Large ventricular septal defect causing left-to-right shunt and pulmonary oedema',\n 'Tension pneumothorax causing mediastinal shift and ductal kinking',\n 'Transposition of the great arteries with parallel circulation'\n ],\n exp: '<strong>Meconium Aspiration Syndrome (MAS)<\/strong> with <strong>PPHN<\/strong>. Thick meconium causes ball-valve airway obstruction → air trapping → hyperinflation and atelectasis; chemical pneumonitis adds an inflammatory component. The barrel-chest hyperinflation on CXR plus meconium-stained liquor clinches MAS. <strong>PPHN<\/strong> occurs when pulmonary vascular resistance fails to fall at birth; the result is right-to-left shunting via the ductus arteriosus and foramen ovale, bypassing the lungs entirely. Right-to-left ductal shunt on echo is its diagnostic hallmark. Management: optimise ventilation, <strong>inhaled nitric oxide (iNO)<\/strong> to reduce pulmonary vascular resistance, high-frequency oscillatory ventilation, and ECMO in refractory cases.',\n imgId: null\n },\n\n {\n id: 4,\n tag: 'Tension Pneumothorax — Emergency Management',\n stem: 'A <strong>31-week female<\/strong> has been stable on nasal CPAP (PEEP 6 cmH&sub2;O) for 52 hours when she develops <strong>acute deterioration<\/strong>: SpO² falls from 97% to 65% despite 100% FiO², heart rate drops to 88\/min, and she becomes dusky and hypotensive. On examination <strong>breath sounds are absent on the left<\/strong> and <strong>the trachea is deviated to the right<\/strong>. What is the correct immediate management?',\n correct: 'Immediate needle decompression of the left chest at the 2nd intercostal space, mid-clavicular line',\n opts: [\n 'Immediate needle decompression of the left chest at the 2nd intercostal space, mid-clavicular line',\n 'Increase CPAP pressure to 10 cmH&sub2;O to re-expand the collapsed lung',\n 'Intratracheal surfactant instillation for presumed late surfactant deficiency',\n 'Urgent echocardiography to exclude cardiac tamponade before any intervention'\n ],\n exp: '<strong>Tension pneumothorax<\/strong> — the classic triad: sudden acute deterioration on positive-pressure ventilation or CPAP, <strong>absent breath sounds on the affected side<\/strong>, and <strong>tracheal deviation to the opposite side<\/strong>. This is a neonatal emergency; <strong>immediate needle decompression<\/strong> at the 2nd ICS mid-clavicular line on the affected side must precede CXR. Prematurity and positive airway pressure are the two greatest risk factors for air leak. <strong>Transillumination<\/strong> with a cold-light probe at the bedside is a rapid confirmatory tool in the NICU. Increasing CPAP would worsen a tension pneumothorax. After needle decompression, a formal chest drain is inserted for definitive management.',\n imgId: null\n },\n\n {\n id: 5,\n tag: 'Infant of Diabetic Mother — RDS Risk',\n stem: 'A <strong>2.2 kg female<\/strong> is born at <strong>35 weeks<\/strong> to a mother with poorly controlled gestational diabetes (HbA1c 8.4% at 32 weeks). The baby develops mild grunting and tachypnoea (RR 66\/min) from birth. The attending considers surfactant deficiency less likely given the gestation of 35 weeks. Which statement about surfactant maturation in <em>infants of diabetic mothers (IDMs)<\/em> is MOST CORRECT?',\n correct: 'Fetal hyperinsulinaemia antagonises cortisol-driven surfactant synthesis, increasing RDS risk at any given gestational age',\n opts: [\n 'Fetal hyperinsulinaemia antagonises cortisol-driven surfactant synthesis, increasing RDS risk at any given gestational age',\n 'Maternal diabetes accelerates fetal lung maturity through excess placental cortisol; IDMs rarely develop RDS',\n 'IDMs invariably have a mature lecithin:sphingomyelin ratio by 34 weeks regardless of glycaemic control',\n 'Surfactant deficiency cannot occur in IDMs beyond 32 weeks as macrosomia implies organ maturity'\n ],\n exp: '<strong>IDMs carry a paradoxically higher RDS risk<\/strong> despite their large size. Chronic fetal hyperglycaemia drives pancreatic beta-cell hyperplasia → <strong>fetal hyperinsulinaemia<\/strong>, which antagonises cortisol’s action on type II pneumocytes and blunts the lecithin (DPPC) synthetic pathway. Consequently, the <strong>lecithin:sphingomyelin (L:S) ratio<\/strong> may be immature even at 35–36 weeks in a poorly controlled diabetic pregnancy. The clinical implication: do <em>not<\/em> use gestational age alone to exclude RDS in an IDM — assess lung maturity with amniotic fluid indices or treat empirically if symptomatic. This case also illustrates why optimal periconceptional and antenatal glycaemic control is essential.',\n imgId: null\n }\n\n ];\n \/* \u2550\u2550\u2550\u2550 END QUESTION BANK \u2550\u2550\u2550\u2550 *\/\n\n\n var answers = {};\n var answered = 0;\n var shuffled = {};\n var done = false;\n\n function byId(id) { return document.getElementById(id); }\n function gid(suffix) { return byId(NS + '-' + suffix); }\n\n function shuffleArr(arr) {\n var a = arr.slice(), i, j, tmp;\n for (i = a.length - 1; i > 0; i--) {\n j = Math.floor(Math.random() * (i + 1));\n tmp = a[i]; a[i] = a[j]; a[j] = tmp;\n }\n return a;\n }\n\n function countVal(val) {\n var k, n = 0;\n for (k in answers) {\n if (answers.hasOwnProperty(k) && answers[k] === val) n++;\n }\n return n;\n }\n\n function buildPips() {\n var cont = gid('pips'), i, q, wLine, wPip, line, pip;\n cont.innerHTML = '';\n for (i = 0; i < QS.length; i++) {\n q = QS[i];\n if (i > 0) {\n wLine = document.createElement('div');\n wLine.className = 'mr-pip-wrap';\n line = document.createElement('div');\n line.className = 'mr-pip-line';\n line.id = NS + '-pl' + q.id;\n wLine.appendChild(line);\n cont.appendChild(wLine);\n }\n wPip = document.createElement('div');\n wPip.className = 'mr-pip-wrap';\n pip = document.createElement('div');\n pip.className = 'mr-pip';\n pip.id = NS + '-pip' + q.id;\n pip.textContent = String(q.id);\n wPip.appendChild(pip);\n cont.appendChild(wPip);\n }\n }\n\n function build() {\n var cont, i, q, opts, card, top, numDiv, meta, tag, stem,\n rule, optsDiv, expDiv, lbl, txt, imgDiv, imgSrc, j,\n optEl, ltrSpan, txtSpan;\n\n cont = gid('cases');\n cont.innerHTML = '';\n answers = {}; answered = 0; shuffled = {}; done = false;\n gid('score').style.display = 'none';\n buildPips();\n\n for (i = 0; i < QS.length; i++) {\n q = QS[i];\n opts = shuffleArr(q.opts);\n shuffled[q.id] = opts;\n\n card = document.createElement('div');\n card.className = 'mr-case';\n\n top = document.createElement('div');\n top.className = 'mr-case-top';\n\n numDiv = document.createElement('div');\n numDiv.className = 'mr-num';\n numDiv.textContent = q.id < 10 ? 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'c' : 'w';\n answered++;\n\n for (i = 0; i < opts.length; i++) {\n el = byId(NS + '-o' + qid + '-' + i);\n if (opts[i] === q.correct) {\n el.className = 'mr-opt correct locked';\n } else if (i === oi) {\n el.className = 'mr-opt wrong locked';\n } else {\n el.className = 'mr-opt dimmed locked';\n }\n }\n\n byId(NS + '-exp' + qid).style.display = 'block';\n byId(NS + '-pip' + qid).className = 'mr-pip ' + (correct ? 'correct' : 'wrong');\n\n if (qid > 1) {\n pl = gid('pl' + qid);\n if (pl) { pl.className = 'mr-pip-line done'; }\n }\n }\n\n function showScore() {\n var c, w, s, net, pct, disp, verdicts, vi, sc;\n if (done) return;\n done = true;\n\n c = countVal('c');\n w = countVal('w');\n s = TOTAL - answered;\n net = (c * 4) - w;\n pct = Math.max(0, Math.round((net \/ MAX) * 100));\n disp = Math.min(100, Math.max(0, pct));\n\n gid('ring').style.background =\n 'conic-gradient(#8B3A3A ' + disp + '%, #EDD8D8 0%)';\n\n gid('pct').textContent = pct + '%';\n gid('net').textContent = 'Net Score: ' + net + ' \/ ' + MAX;\n\n verdicts = [\n [5, 'Perfect round. Exceptional clinical reasoning.'],\n [4, 'Strong \\u2014 one nuance to revisit.'],\n [3, 'Solid base \\u2014 consolidate the finer distinctions.'],\n [2, 'Halfway there \\u2014 review the missed cases carefully.'],\n [0, 'These cases repay close reading. Come back tomorrow.']\n ];\n gid('verdict').textContent = verdicts[4][1];\n for (vi = 0; vi < verdicts.length; vi++) {\n if (c >= verdicts[vi][0]) {\n gid('verdict').textContent = verdicts[vi][1];\n break;\n }\n }\n\n gid('ct-c').textContent = '\\u2705 ' + c + ' Correct';\n gid('ct-w').textContent = '\\u274C ' + w + ' Wrong';\n gid('ct-s').textContent = '\\u23ED ' + s + ' Skipped';\n\n sc = gid('score');\n sc.style.display = 'block';\n sc.scrollIntoView({ behavior: 'smooth', block: 'center' });\n }\n\n function initObserver() {\n var sentinel = gid('sentinel'), bar = gid('progress');\n if (!sentinel || !bar || !window.IntersectionObserver) return;\n new IntersectionObserver(function (entries) {\n if (!entries[0].isIntersecting) {\n bar.className = 'mr-progress visible';\n } else {\n bar.className = 'mr-progress';\n }\n }, { threshold: 0 }).observe(sentinel);\n }\n\n function init() {\n gid('submit').addEventListener('click', showScore);\n gid('retry').addEventListener('click', function () {\n build();\n window.scrollTo(0, 0);\n });\n initObserver();\n build();\n }\n\n if (document.readyState === 'loading') {\n document.addEventListener('DOMContentLoaded', init);\n } else {\n init();\n }\n\n}());\n<\/script>\n<\/body>\n<\/html>\n\n\n\n<p class=\"has-text-align-right wp-block-paragraph\"><a href=\"\/index.php\/morning-rounds\/neonatology-clinical\/\" type=\"link\" id=\"\/index.php\/morning-rounds\/neonatology-clinical\/\">Round 1: Neonatology Clinical<\/a><\/p>\n\n\n","protected":false},"excerpt":{"rendered":"<p>Morning Rounds \u00b7 Neonatal Respiratory Distress RDS TTN MAS Pneumothorax Gestation Onset CXR clue Mechanism Treatment Course Preterm <34 wk Birth \u2192 4 h Ground-glass + air bronchogram \u2193 Surfactant Surfactant + CPAP Worsens 48\u201372 h Near\/full term Birth \u2192 6 h Perihilar streaking, fluid in fissures Delayed fluid resorption Supportive only Resolves 24\u201348 h… <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"categories":[74,24,20],"tags":[],"class_list":["post-36981","post","type-post","status-publish","format-standard","hentry","category-morning-rounds","category-neet-pg","category-pediatrics"],"yoast_head":"\n<title>Neonatal Respiratory Distress - 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Serif 4,Georgia,serif\" font-size=\"11\" font-weight=\"700\" fill=\"#5C1E1E\">RDS<\/text>\n <text x=\"240\" y=\"27\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"11\" font-weight=\"700\" fill=\"#FFFAFA\">TTN<\/text>\n <text x=\"398\" y=\"27\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"11\" font-weight=\"700\" fill=\"#FFFAFA\">MAS<\/text>\n <text x=\"567\" y=\"27\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"11\" font-weight=\"700\" fill=\"#FFFAFA\">Pneumothorax<\/text>\n\n \n <rect x=\"0\" y=\"44\" width=\"660\" height=\"28\" fill=\"#FDF4F4\"\/>\n <rect x=\"0\" y=\"72\" width=\"660\" height=\"28\" fill=\"#FFFAFA\"\/>\n <rect x=\"0\" y=\"100\" width=\"660\" height=\"28\" fill=\"#FDF4F4\"\/>\n <rect x=\"0\" y=\"128\" width=\"660\" height=\"28\" fill=\"#FFFAFA\"\/>\n <rect x=\"0\" y=\"156\" width=\"660\" height=\"28\" fill=\"#FDF4F4\"\/>\n <rect x=\"0\" y=\"184\" width=\"660\" height=\"28\" fill=\"#FFFAFA\"\/>\n\n \n <text x=\"6\" y=\"63\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"9\" font-weight=\"700\" fill=\"#9A7070\">Gestation<\/text>\n <text x=\"6\" y=\"91\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"9\" font-weight=\"700\" fill=\"#9A7070\">Onset<\/text>\n <text x=\"6\" y=\"119\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"9\" font-weight=\"700\" fill=\"#9A7070\">CXR clue<\/text>\n <text x=\"6\" y=\"147\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"9\" font-weight=\"700\" fill=\"#9A7070\">Mechanism<\/text>\n <text x=\"6\" y=\"175\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"9\" font-weight=\"700\" fill=\"#9A7070\">Treatment<\/text>\n <text x=\"6\" y=\"203\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"9\" font-weight=\"700\" fill=\"#9A7070\">Course<\/text>\n\n \n <text x=\"82\" y=\"63\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Preterm <34 wk<\/text>\n <text x=\"82\" y=\"91\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Birth \u2192 4 h<\/text>\n <text x=\"82\" y=\"112\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Ground-glass +<\/text>\n <text x=\"82\" y=\"124\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">air bronchogram<\/text>\n <text x=\"82\" y=\"147\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">\u2193 Surfactant<\/text>\n <text x=\"82\" y=\"175\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Surfactant + CPAP<\/text>\n <text x=\"82\" y=\"203\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Worsens 48\u201372 h<\/text>\n\n \n <text x=\"240\" y=\"63\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Near\/full term<\/text>\n <text x=\"240\" y=\"91\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Birth \u2192 6 h<\/text>\n <text x=\"240\" y=\"112\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Perihilar streaking,<\/text>\n <text x=\"240\" y=\"124\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">fluid in fissures<\/text>\n <text x=\"240\" y=\"147\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Delayed fluid resorption<\/text>\n <text x=\"240\" y=\"175\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Supportive only<\/text>\n <text x=\"240\" y=\"203\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Resolves 24\u201348 h<\/text>\n\n \n <text x=\"398\" y=\"63\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Post-term \/ term<\/text>\n <text x=\"398\" y=\"91\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Immediate<\/text>\n <text x=\"398\" y=\"112\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Coarse patches +<\/text>\n <text x=\"398\" y=\"124\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">hyperinflation<\/text>\n <text x=\"398\" y=\"147\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Airway obstruction<\/text>\n <text x=\"398\" y=\"175\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Suction + support<\/text>\n <text x=\"398\" y=\"203\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Variable; risk PPHN<\/text>\n\n \n <text x=\"567\" y=\"63\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Any gestation<\/text>\n <text x=\"567\" y=\"91\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Sudden, any time<\/text>\n <text x=\"567\" y=\"112\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Absent BS; tracheal<\/text>\n <text x=\"567\" y=\"124\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">deviation (tension)<\/text>\n <text x=\"567\" y=\"147\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Air leak syndrome<\/text>\n <text x=\"567\" y=\"175\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Needle \/ chest drain<\/text>\n <text x=\"567\" y=\"203\" text-anchor=\"middle\" font-family=\"Source Serif 4,Georgia,serif\" font-size=\"10\" fill=\"#2A1010\">Emergency if tension<\/text>\n\n \n <line x1=\"156\" y1=\"8\" x2=\"156\" y2=\"210\" stroke=\"#EDD8D8\" stroke-width=\"1\"\/>\n <line x1=\"314\" y1=\"8\" x2=\"314\" y2=\"210\" stroke=\"#EDD8D8\" stroke-width=\"1\"\/>\n <line x1=\"472\" y1=\"8\" x2=\"472\" y2=\"210\" stroke=\"#EDD8D8\" stroke-width=\"1\"\/>\n \n <line x1=\"0\" y1=\"44\" x2=\"660\" y2=\"44\" stroke=\"#EDD8D8\" stroke-width=\"0.5\"\/>\n <line x1=\"0\" y1=\"72\" x2=\"660\" y2=\"72\" stroke=\"#EDD8D8\" stroke-width=\"0.5\"\/>\n <line x1=\"0\" y1=\"100\" x2=\"660\" y2=\"100\" stroke=\"#EDD8D8\" stroke-width=\"0.5\"\/>\n <line x1=\"0\" y1=\"128\" x2=\"660\" y2=\"128\" stroke=\"#EDD8D8\" stroke-width=\"0.5\"\/>\n <line x1=\"0\" y1=\"156\" x2=\"660\" y2=\"156\" stroke=\"#EDD8D8\" stroke-width=\"0.5\"\/>\n <line x1=\"0\" y1=\"184\" x2=\"660\" y2=\"184\" stroke=\"#EDD8D8\" stroke-width=\"0.5\"\/>\n <\/svg>\n <figcaption>\n Four causes of neonatal respiratory distress \u2014 key discriminators.\n <strong>RDS<\/strong>: preterm, ground-glass CXR, worsening over 48\u201372 h \u2014 treat with surfactant + CPAP.\n <strong>TTN<\/strong>: near-term elective LSCS, wet-lung CXR, self-resolves within 48 h.\n <strong>MAS<\/strong>: meconium-stained liquor, barrel-chest hyperinflation, risk of PPHN.\n <strong>Pneumothorax<\/strong>: sudden deterioration on PPV\/CPAP, absent breath sounds, tracheal deviation \u2014 needle decompression is life-saving.\n Grunting \u00b7 Flaring \u00b7 Retracting are common to all four; the discriminators are <em>context, gestation, and CXR<\/em>.\n <\/figcaption>\n <\/figure>\n<\/div>\n\n\n\n<div id=\"mrq01\">\n\n <div class=\"mr-header\">\n <div class=\"mr-eyebrow\">Morning Rounds \u00b7 Neonatology Series<\/div>\n <div class=\"mr-title\">\n Neonatal Respiratory Distress<br><em>Clinical Reasoning<\/em>\n <\/div>\n <div class=\"mr-subtitle\">Five cases · Read carefully · Trust your instinct<\/div>\n <div class=\"mr-chips\">\n <span class=\"mr-chip\">5 Cases<\/span>\n <span class=\"mr-chip\">+4 \/ −1 scoring<\/span>\n <span class=\"mr-chip\">Options reshuffled<\/span>\n <\/div>\n <\/div>\n\n <div class=\"mr-sentinel\" id=\"mrq01-sentinel\"><\/div>\n\n <div class=\"mr-progress\" id=\"mrq01-progress\">\n <div class=\"mr-prog-inner\">\n <div class=\"mr-pips\" id=\"mrq01-pips\"><\/div>\n <\/div>\n <\/div>\n\n <div class=\"mr-body\">\n <div id=\"mrq01-cases\"><\/div>\n\n <div class=\"mr-submit-wrap\">\n <button class=\"mr-btn\" id=\"mrq01-submit\">Submit for Debrief<\/button>\n <\/div>\n\n <div class=\"mr-score\" id=\"mrq01-score\">\n <div class=\"mr-score-in\">\n <div class=\"mr-score-ey\">Round Complete<\/div>\n <div class=\"mr-ring\" id=\"mrq01-ring\">\n <div class=\"mr-ring-in\">\n <span class=\"mr-ring-pct\" id=\"mrq01-pct\">0%<\/span>\n <span class=\"mr-ring-sub\">net<\/span>\n <\/div>\n <\/div>\n <div class=\"mr-score-title\">Your Debrief<\/div>\n <div class=\"mr-score-net\" id=\"mrq01-net\"><\/div>\n <div class=\"mr-verdict\" id=\"mrq01-verdict\"><\/div>\n <div class=\"mr-bands\">\n <span class=\"mr-band mr-band-c\" id=\"mrq01-ct-c\"><\/span>\n <span class=\"mr-band mr-band-w\" id=\"mrq01-ct-w\"><\/span>\n <span class=\"mr-band mr-band-s\" id=\"mrq01-ct-s\"><\/span>\n <\/div>\n <button class=\"mr-retry\" id=\"mrq01-retry\">↻ New Round<\/button>\n <\/div>\n <\/div>\n\n <\/div>\n<\/div>\n\n\n<script>\n(function () {\n 'use strict';\n\n var NS = 'mrq01';\n var TOTAL = 5;\n var MAX = 20;\n var LTRS = ['A','B','C','D'];\n\n \/* \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\n QUESTION BANK\n \u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550\u2550 *\/\n var QS = [\n\n {\n id: 1,\n tag: 'Respiratory Distress Syndrome — Pathophysiology & Treatment',\n stem: 'A neonate is born at <strong>29 weeks gestation<\/strong> by emergency caesarean section for antepartum haemorrhage. The mother received <em>no antenatal corticosteroids<\/em>. Within 30 minutes of birth the baby develops <strong>grunting, nasal flaring, and intercostal recession<\/strong> with an oxygen requirement of 55%. Chest X-ray shows <strong>bilateral ground-glass opacification with air bronchograms<\/strong>. Which statement best describes the pathophysiology and correct management?',\n correct: 'Surfactant deficiency causes alveolar collapse and V\/Q mismatch; intratracheal surfactant plus CPAP is first-line treatment',\n opts: [\n 'Surfactant deficiency causes alveolar collapse and V\/Q mismatch; intratracheal surfactant plus CPAP is first-line treatment',\n 'Meconium aspiration causes airway obstruction; bronchoscopic lavage should be performed urgently',\n 'Transient tachypnoea of the newborn from retained lung fluid is the diagnosis; it resolves within 6 hours without surfactant',\n 'Group B streptococcal pneumonia is most likely; surfactant is contraindicated until infection is treated'\n ],\n exp: '<strong>Respiratory Distress Syndrome (RDS)<\/strong> is caused by deficiency of pulmonary surfactant (primarily dipalmitoyl phosphatidylcholine), resulting in high alveolar surface tension, diffuse atelectasis, and right-to-left shunting. It is the commonest cause of respiratory distress in preterm neonates; incidence is inversely proportional to gestational age. <strong>Antenatal corticosteroids<\/strong> (betamethasone ≥24 hours before delivery) are the most effective preventive measure. Postnatal treatment is <strong>exogenous surfactant via endotracheal tube<\/strong> combined with <strong>CPAP<\/strong> to maintain functional residual capacity. The ground-glass appearance with air bronchograms on CXR is pathognomonic.',\n imgId: 'mrq01-img1'\n },\n\n {\n id: 2,\n tag: 'Transient Tachypnoea of the Newborn — Diagnosis',\n stem: 'A <strong>3.8 kg male<\/strong> is born at <strong>38 weeks<\/strong> by <em>elective LSCS without labour<\/em> to a G2P1 mother with no obstetric complications. Within 2 hours of birth he develops <strong>tachypnoea (RR 74\/min)<\/strong>, mild subcostal retractions, and intermittent grunting. SpO² is 93% on room air. Chest X-ray shows <strong>prominent perihilar streaking and fluid in the right horizontal fissure<\/strong>. By 40 hours of life he is breathing normally on room air. What was the most likely diagnosis?',\n correct: 'Transient Tachypnoea of the Newborn (TTN) \u2014 delayed resorption of fetal lung fluid due to absence of labour',\n opts: [\n 'Transient Tachypnoea of the Newborn (TTN) \u2014 delayed resorption of fetal lung fluid due to absence of labour',\n 'Respiratory Distress Syndrome \u2014 surfactant deficiency causing alveolar collapse',\n 'Meconium Aspiration Syndrome \u2014 chemical pneumonitis from inhaled meconium',\n 'Congenital pneumonia \u2014 vertical transmission of Group B Streptococcus'\n ],\n exp: '<strong>TTN<\/strong> is the classic “wet lung” of the near-term infant born by <strong>elective LSCS without labour<\/strong>. During labour, catecholamine surges and thoracic compression activate epithelial Na&sup+; channels that reabsorb fetal lung fluid; elective LSCS bypasses this mechanism. Key discriminators: near\/full-term gestation, elective LSCS, wet-lung CXR (perihilar streaking, fissure fluid), and <strong>spontaneous resolution within 24–48 hours<\/strong>. RDS would worsen rather than resolve in 36–40 h. MAS requires meconium-stained liquor. Congenital pneumonia would show focal consolidation with a systemically unwell neonate. Management of TTN is purely supportive — supplemental oxygen as needed.',\n imgId: null\n },\n\n {\n id: 3,\n tag: 'Meconium Aspiration Syndrome — Complication',\n stem: 'A term male is delivered at <strong>41+3 weeks<\/strong> after prolonged labour. The liquor was <strong>thick meconium-stained<\/strong>. At birth the infant was limp and apnoeic; after initial resuscitation he remains in respiratory distress with SpO² of 78% on 70% oxygen. CXR shows <strong>bilateral coarse patchy opacities with hyperinflation<\/strong> and a flattened diaphragm. Echocardiography reveals <strong>right-to-left shunting at the ductus arteriosus<\/strong>. Which complication does the echocardiography finding indicate?',\n correct: 'Persistent Pulmonary Hypertension of the Newborn (PPHN) \u2014 failure of pulmonary vascular resistance to fall after birth',\n opts: [\n 'Persistent Pulmonary Hypertension of the Newborn (PPHN) \u2014 failure of pulmonary vascular resistance to fall after birth',\n 'Large ventricular septal defect causing left-to-right shunt and pulmonary oedema',\n 'Tension pneumothorax causing mediastinal shift and ductal kinking',\n 'Transposition of the great arteries with parallel circulation'\n ],\n exp: '<strong>Meconium Aspiration Syndrome (MAS)<\/strong> with <strong>PPHN<\/strong>. Thick meconium causes ball-valve airway obstruction → air trapping → hyperinflation and atelectasis; chemical pneumonitis adds an inflammatory component. The barrel-chest hyperinflation on CXR plus meconium-stained liquor clinches MAS. <strong>PPHN<\/strong> occurs when pulmonary vascular resistance fails to fall at birth; the result is right-to-left shunting via the ductus arteriosus and foramen ovale, bypassing the lungs entirely. Right-to-left ductal shunt on echo is its diagnostic hallmark. Management: optimise ventilation, <strong>inhaled nitric oxide (iNO)<\/strong> to reduce pulmonary vascular resistance, high-frequency oscillatory ventilation, and ECMO in refractory cases.',\n imgId: null\n },\n\n {\n id: 4,\n tag: 'Tension Pneumothorax — Emergency Management',\n stem: 'A <strong>31-week female<\/strong> has been stable on nasal CPAP (PEEP 6 cmH&sub2;O) for 52 hours when she develops <strong>acute deterioration<\/strong>: SpO² falls from 97% to 65% despite 100% FiO², heart rate drops to 88\/min, and she becomes dusky and hypotensive. On examination <strong>breath sounds are absent on the left<\/strong> and <strong>the trachea is deviated to the right<\/strong>. What is the correct immediate management?',\n correct: 'Immediate needle decompression of the left chest at the 2nd intercostal space, mid-clavicular line',\n opts: [\n 'Immediate needle decompression of the left chest at the 2nd intercostal space, mid-clavicular line',\n 'Increase CPAP pressure to 10 cmH&sub2;O to re-expand the collapsed lung',\n 'Intratracheal surfactant instillation for presumed late surfactant deficiency',\n 'Urgent echocardiography to exclude cardiac tamponade before any intervention'\n ],\n exp: '<strong>Tension pneumothorax<\/strong> — the classic triad: sudden acute deterioration on positive-pressure ventilation or CPAP, <strong>absent breath sounds on the affected side<\/strong>, and <strong>tracheal deviation to the opposite side<\/strong>. This is a neonatal emergency; <strong>immediate needle decompression<\/strong> at the 2nd ICS mid-clavicular line on the affected side must precede CXR. Prematurity and positive airway pressure are the two greatest risk factors for air leak. <strong>Transillumination<\/strong> with a cold-light probe at the bedside is a rapid confirmatory tool in the NICU. Increasing CPAP would worsen a tension pneumothorax. After needle decompression, a formal chest drain is inserted for definitive management.',\n imgId: null\n },\n\n {\n id: 5,\n tag: 'Infant of Diabetic Mother — RDS Risk',\n stem: 'A <strong>2.2 kg female<\/strong> is born at <strong>35 weeks<\/strong> to a mother with poorly controlled gestational diabetes (HbA1c 8.4% at 32 weeks). The baby develops mild grunting and tachypnoea (RR 66\/min) from birth. The attending considers surfactant deficiency less likely given the gestation of 35 weeks. Which statement about surfactant maturation in <em>infants of diabetic mothers (IDMs)<\/em> is MOST CORRECT?',\n correct: 'Fetal hyperinsulinaemia antagonises cortisol-driven surfactant synthesis, increasing RDS risk at any given gestational age',\n opts: [\n 'Fetal hyperinsulinaemia antagonises cortisol-driven surfactant synthesis, increasing RDS risk at any given gestational age',\n 'Maternal diabetes accelerates fetal lung maturity through excess placental cortisol; IDMs rarely develop RDS',\n 'IDMs invariably have a mature lecithin:sphingomyelin ratio by 34 weeks regardless of glycaemic control',\n 'Surfactant deficiency cannot occur in IDMs beyond 32 weeks as macrosomia implies organ maturity'\n ],\n exp: '<strong>IDMs carry a paradoxically higher RDS risk<\/strong> despite their large size. Chronic fetal hyperglycaemia drives pancreatic beta-cell hyperplasia → <strong>fetal hyperinsulinaemia<\/strong>, which antagonises cortisol’s action on type II pneumocytes and blunts the lecithin (DPPC) synthetic pathway. Consequently, the <strong>lecithin:sphingomyelin (L:S) ratio<\/strong> may be immature even at 35–36 weeks in a poorly controlled diabetic pregnancy. The clinical implication: do <em>not<\/em> use gestational age alone to exclude RDS in an IDM — assess lung maturity with amniotic fluid indices or treat empirically if symptomatic. This case also illustrates why optimal periconceptional and antenatal glycaemic control is essential.',\n imgId: null\n }\n\n ];\n \/* \u2550\u2550\u2550\u2550 END QUESTION BANK \u2550\u2550\u2550\u2550 *\/\n\n\n var answers = {};\n var answered = 0;\n var shuffled = {};\n var done = false;\n\n function byId(id) { return document.getElementById(id); }\n function gid(suffix) { return byId(NS + '-' + suffix); }\n\n function shuffleArr(arr) {\n var a = arr.slice(), i, j, tmp;\n for (i = a.length - 1; i > 0; i--) {\n j = Math.floor(Math.random() * (i + 1));\n tmp = a[i]; a[i] = a[j]; a[j] = tmp;\n }\n return a;\n }\n\n function countVal(val) {\n var k, n = 0;\n for (k in answers) {\n if (answers.hasOwnProperty(k) && answers[k] === val) n++;\n }\n return n;\n }\n\n function buildPips() {\n var cont = gid('pips'), i, q, wLine, wPip, line, pip;\n cont.innerHTML = '';\n for (i = 0; i < QS.length; i++) {\n q = QS[i];\n if (i > 0) {\n wLine = document.createElement('div');\n wLine.className = 'mr-pip-wrap';\n line = document.createElement('div');\n line.className = 'mr-pip-line';\n line.id = NS + '-pl' + q.id;\n wLine.appendChild(line);\n cont.appendChild(wLine);\n }\n wPip = document.createElement('div');\n wPip.className = 'mr-pip-wrap';\n pip = document.createElement('div');\n pip.className = 'mr-pip';\n pip.id = NS + '-pip' + q.id;\n pip.textContent = String(q.id);\n wPip.appendChild(pip);\n cont.appendChild(wPip);\n }\n }\n\n function build() {\n var cont, i, q, opts, card, top, numDiv, meta, tag, stem,\n rule, optsDiv, expDiv, lbl, txt, imgDiv, imgSrc, j,\n optEl, ltrSpan, txtSpan;\n\n cont = gid('cases');\n cont.innerHTML = '';\n answers = {}; answered = 0; shuffled = {}; done = false;\n gid('score').style.display = 'none';\n buildPips();\n\n for (i = 0; i < QS.length; i++) {\n q = QS[i];\n opts = shuffleArr(q.opts);\n shuffled[q.id] = opts;\n\n card = document.createElement('div');\n card.className = 'mr-case';\n\n top = document.createElement('div');\n top.className = 'mr-case-top';\n\n numDiv = document.createElement('div');\n numDiv.className = 'mr-num';\n numDiv.textContent = q.id < 10 ? 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'correct' : 'wrong');\n\n if (qid > 1) {\n pl = gid('pl' + qid);\n if (pl) { pl.className = 'mr-pip-line done'; }\n }\n }\n\n function showScore() {\n var c, w, s, net, pct, disp, verdicts, vi, sc;\n if (done) return;\n done = true;\n\n c = countVal('c');\n w = countVal('w');\n s = TOTAL - answered;\n net = (c * 4) - w;\n pct = Math.max(0, Math.round((net \/ MAX) * 100));\n disp = Math.min(100, Math.max(0, pct));\n\n gid('ring').style.background =\n 'conic-gradient(#8B3A3A ' + disp + '%, #EDD8D8 0%)';\n\n gid('pct').textContent = pct + '%';\n gid('net').textContent = 'Net Score: ' + net + ' \/ ' + MAX;\n\n verdicts = [\n [5, 'Perfect round. Exceptional clinical reasoning.'],\n [4, 'Strong \\u2014 one nuance to revisit.'],\n [3, 'Solid base \\u2014 consolidate the finer distinctions.'],\n [2, 'Halfway there \\u2014 review the missed cases carefully.'],\n [0, 'These cases repay close reading. Come back tomorrow.']\n ];\n gid('verdict').textContent = verdicts[4][1];\n for (vi = 0; vi < verdicts.length; vi++) {\n if (c >= verdicts[vi][0]) {\n gid('verdict').textContent = verdicts[vi][1];\n break;\n }\n }\n\n gid('ct-c').textContent = '\\u2705 ' + c + ' Correct';\n gid('ct-w').textContent = '\\u274C ' + w + ' Wrong';\n gid('ct-s').textContent = '\\u23ED ' + s + ' Skipped';\n\n sc = gid('score');\n sc.style.display = 'block';\n sc.scrollIntoView({ behavior: 'smooth', block: 'center' });\n }\n\n function initObserver() {\n var sentinel = gid('sentinel'), bar = gid('progress');\n if (!sentinel || !bar || !window.IntersectionObserver) return;\n new IntersectionObserver(function (entries) {\n if (!entries[0].isIntersecting) {\n bar.className = 'mr-progress visible';\n } else {\n bar.className = 'mr-progress';\n }\n }, { threshold: 0 }).observe(sentinel);\n }\n\n function init() {\n gid('submit').addEventListener('click', showScore);\n gid('retry').addEventListener('click', function () {\n build();\n window.scrollTo(0, 0);\n });\n initObserver();\n build();\n }\n\n if (document.readyState === 'loading') {\n document.addEventListener('DOMContentLoaded', init);\n } else {\n init();\n }\n\n}());\n<\/script>\n<\/body>\n<\/html>\n\n\n\n<p class=\"has-text-align-right wp-block-paragraph\"><a href=\"\/index.php\/morning-rounds\/neonatology-clinical\/\" type=\"link\" id=\"\/index.php\/morning-rounds\/neonatology-clinical\/\">Round 1: Neonatology Clinical<\/a><\/p>\n\n\n","protected":false},"excerpt":{"rendered":"<p>Morning Rounds \u00b7 Neonatal Respiratory Distress RDS TTN MAS Pneumothorax Gestation Onset CXR clue Mechanism Treatment Course Preterm <34 wk Birth \u2192 4 h Ground-glass + air bronchogram \u2193 Surfactant Surfactant + CPAP Worsens 48\u201372 h Near\/full term Birth \u2192 6 h Perihilar streaking, fluid in fissures Delayed fluid resorption Supportive only Resolves 24\u201348 h… <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"categories":[74,24,20],"tags":[],"class_list":["post-36981","post","type-post","status-publish","format-standard","hentry","category-morning-rounds","category-neet-pg","category-pediatrics"],"yoast_head":"\n<title>Neonatal Respiratory Distress - 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