congenital diaphragmatic herniareferences • keijzer r, puri p. congenital diaphragmatic hernia....
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Management of Congenital Diaphragmatic Hernia
Volodymyr Labinskyy, MD Richmond Medical Center
5/15/13
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• 5 month old BB admitted for several days of non-bilious, non projectale vomiting
• PMH: None • PSH: None • Allergies: NKDA • Second child, vaginal delivery, normal pregnancy, Apgar 8 • Family Hx: Inguinal hernias in mother & sibling.
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• VS: T 98.3; BP 108/66, HR 144, RR 44, sat 100% on RA • Labs:
– CBC: 6.5<9.6/29.6>190 – BMP: 139/4.9/102.2/21.3/9.2/0.3/61 – AST/ALT: 33/21; Alk phos 245; Albumin 4.1
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UGI series: right-sided diaphragmatic hernia.
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CXR: Retrocardiac and right basilar opacity with lucency. Suspicious for diaphragmatic hernia. The left lung is clear.
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Postop day #1 www.downstatesurgery.org
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Postop day #1 (2nd procedure) www.downstatesurgery.org
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Postop day #3 (2nd procedure) www.downstatesurgery.org
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Postop day #1 (third procedure) www.downstatesurgery.org
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Congenital Diaphragmatic Hernia
A Short Review
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1 in 2000 - 3000 live births Failure of complete closure of pleuroperitoneal canal leading to herniation of the abdominal viscera into the thorax, at about 8th week of gestation
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Herniation of abdominal contents: inhibit normal lung growth ipsilateral lung hypoplasia decreased lung weight decreased number of bronchi, alveoli and in cross section of pulmonary arterial branches • The hypoplasia may be bilateral • The degree of hypoplasia is related to the time of gestation when herniation occurred
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Three types of CDH:
Posterolateral Bohdaleck-type (approximately 70%) Anterior Morgagni-type (approximately 27%) Central septum transversum-type (approximately 2-3%)
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Fetal development of the diaphragm: (A) Fusion of pleuroperitoneal membrane, (B) embryological origin of different parts of the diaphragm, (C) central tendon obliterating
pleuroperitoneal canal, and (D) fully developed diaphragm
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Diagnosis of CDH Up to two thirds of CDH cases are diagnosed routinely during antenatal US testing in the second or third trimester
MRI rarely needed to definitively diagnose CDH when US is equivocal; can also assess fetal lung volumes
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Differential Diagnosis
• Antenatal - Extralobular sequestration - Congenital cystic adenomatoid malformation - Congenital lobar emphysema - Diffuse pulmonary cysts - Pulmonary agenesis
• Postnatal - Pneumothorax - True dextrocardia - Laryngotracheal obstruction
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Prognostic Indicators
• Fetal lung to head ratio • Liver position • Left- or right-sided defects • Large defects • Patch repair vs. primary repair • The pressure of the pulmonary circulation • Coexisting anomalies • The duration of ECMO
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• Cardiovascular anomalies in 23% of patients with CDH
• Increase in pulmonary vascular resistance may lead to right-to-left shunting
• The increase in intra-thoracic components may lead to obstruction of the IVC and decrease in venous return and cardiac output
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Signs and symptoms of lung hypoplasia:
• Severe respiratory distress, tachypnea and cyanosis
• Scaphoid abdomen • Mediastinal contents
are shifted • 5% may present with
little respiratory symptoms and may presents with bowl obstruction
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Management
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Ventilation Strategies • Intubation immediately after delivery • Preductal saturation 80% to 95% and a
postductal saturation greater then 70% • Low peak inspiratory pressures (less than 20-25 cm H2O) • Minimal positive end expiratory pressures (2-5 cm H2O) • Permissive hypercapnia • Incorporation of high-frequency oscillation
ventilation
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Management of Pulmonary Hypertension
• Inhaled nitric oxide (iNO), particularly when there is either an oxygenation index of 20 or higher and/or a preductal–postductal saturation difference of 10% or higher.
• Intravenous prostaglandin E1 or oral sildenafil (a phosphodiesterase inhibitor) may be used
• No clear benefit has yet been shown in studies conducted to evaluate the efficacy of either iNO or phosphodiesterase inhibitors
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Surgical Management
Surgical candidates are expected to fulfill the following criteria:
• Mean arterial blood pressure is normal for gestational age
• Preductal saturation level is between 85% and 95% on FiO2 <50%
• Serum lactate is <3 mmol/L • Urine production is >2 mL/kg/h
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Advantages of the open repair:
• easier reduction of intra-abdominal viscera • ability to mobilize the posterior rim of the
diaphragm for closure • easier manipulation of the intestines in cases of
rotational abnormalities • avoidance of thoracotomy-associated
musculoskeletal abnormalities
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Lap Hernia Repair www.downstatesurgery.org
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Advantages of minimally invasive surgical approaches:
• advantages of smaller incisions • decreased risk of incisional hernias • decreased chest deformity • reduced postoperative pain • possibly better postoperative pulmonary
compliance
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Indicators of successful thoracoscopic surgery:
• liver and stomach located in their normal anatomic position
• absence of significant cardiac anomalies • absence of preoperative ECMO • peak inspiratory pressure ≤26 cm H2O • no clinical evidence of PHTN
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Disadvantages of thoracoscopic approach:
• higher recurrence rate • greater operative time and • the inability to perform a prophylactic Nissen
fundoplication for gastroesophageal reflux disease (GERD) in those at high risk
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Patch Repair
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• Various synthetic (polytetrafuoroethylene) and bioprosthetic (porcine small intestine– or dermis-derived matrices) materials have been used in patch repairs
• Synthetic patches have been associated with
recurrence rates of up to 50%, which occur in a bimodal fashion as either early (2-7 months) or late (20-51 months)
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Fetal endoscopic tracheal occlusion (FETO) has been shown to improve both LHR and pulmonary blood flow.
Whether FETO affects survival is still under considerable debate
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References • Keijzer R, Puri P. Congenital diaphragmatic hernia. Semin Pediatr Surg. 2010;19:180-185. • Logan JW, Rice HE, Goldberg RN, Cotten CM. Congenital diaphragmatic hernia: a
systematic review and summary of best-evidence practice strategies. J Perinatol. 2007;27:535-549.
• Jesudason EC, Connell MG, Fernig DG, Lloyd DA, Losty PD. Early lung malformations in congenital diaphragmatic hernia. J Pediatr Surg. 2000;35:124-127.
• Mullassery D, Ba’ath ME, Jesudason EC, Losty PD. Value of liver herniation in prediction of outcome in fetal congenital diaphragmatic hernia: a systematic review and meta-analysis. Ultrasound Obstet Gynecol. 2010;35:609-614.
• Reiss I, Schaible T, van den Hout L, et al; CDH EURO Consortium. Standardized postnatal management of infants with congenital diaphragmatic hernia in Europe: the CDH EURO Consortium consensus. Neonatology. 2010;98:354-364.
• Clark RH, Hardin WD Jr, Hirschl RB, et al. Current surgical management of congenital diaphragmatic hernia: a report from the Congenital Diaphragmatic Hernia Study Group. J Pediatr Surg. 1998;33:1004-1009.
• Mitchell IC, Garcia NM, Barber R, Ahmad N, Hicks BA, Fischer AC. Permacol: a potential biologic patch alternative in congenital diaphragmatic hernia repair. J Pediatr Surg. 2008;43:2161-2164.
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Conclusions
• CDH is a rare congenital defect associated with poor postnatal outcomes
• A recent transition in ventilation strategies has helped improve survival
• Surgical correction with delayed repair remains the gold standard,
• Fetal intervention is a rapidly developing field that may result in improved outcomes
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Thank you !
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