Up to the chest in bowels: case of strangulated right diaphragmatic hernia with paraesophageal hernia in a non-trauma patient.

A Bochdalek hernia is a rare congenital diaphragmatic hernia often diagnosed in infancy and classically occurring on the left side. We report a case of a 78-year-old female who presented with a right-sided posterolateral diaphragmatic hernia containing multiple loops of bowel with evidence of ischemia as well as a type 4 paraesophageal hernia. The stomach was rotated on the organoaxial plane, and the duodenum was within the mediastinum. The patient was taken emergently for an exploratory laparotomy. A posterolateral hernia defect containing 50 cm of strangulated small bowel was identified and resected, a primary stapled enteroenterostomy was performed and the hernia defect was repaired primarily. The stomach was reduced, a primary crura repair was performed, and gastropexy was performed with a gastrojejunostomy tube. The patient was transferred to the intensive care unit, and subsequently extubated, enteral feeds were initiated, and had anticipated discharge to a skilled nursing facility. This case highlights an uncommon atraumatic presentation of an adult with a congenital diaphragmatic hernia. Its rarity is further denoted due to its right-sided laterality and strangulated small bowel as the usual herniated abdominal organs are the liver or colon.

When more is more: Utilizing finite element analysis to assess chest wall injury stability after surgical stabilization of all rib fractures versus only a portion of the rib fractures.

BACKGROUND: Surgical stabilization of rib fractures (SSRF) continues to gain acceptance. Controversary exists around the number of rib fractures needing stabilization. We sought to analyze chest wall stability (CWS) after SSRF using finite element analysis (FEA) modeling in various rib fracture patterns, hypothesizing not stabilizing all fractures leaves the chest wall unstable. METHODS: FEA thoracic model development was described previously. Two fracture patterns with three case scenarios each were defined for right ribs 4 to 9. Fracture Pattern 1; Case 1-all 6 ribs with lateral fractures and no stabilization; Case 2-all six fractures stabilized; Case 3-only fractures 5 to 7 were stabilized. Fracture Pattern 2; Case 4-all six ribs fractured in a flail pattern (anterior-lateral and posterior-lateral) and no stabilization; Case 5-all 12 fractures stabilized; Case 6-only six anterior-lateral fractures were stabilized. Three assessment criteria were used to quantify thoracic motion: normalized mean absolute error (NMAE), normalized root mean square error (NRMSE), and normalized interfragmentary motion (NIFM). RESULTS: Fracture Pattern 1: Case 1-NMAE and NRMSE analysis demonstrated significant loss of CWS up to 50% with left axial rotation; Case 2-CWS almost completely returned to nonfractured state; Case 3-CWS loss up to 37%. Fracture Pattern 2: Case 4-up to 49% of CWS lost with right axial rotation; Case 5-less than 3% CWS lost; Case 6-over 40% CWS lost. For both fracture patterns, when stabilizing all fractures, NIFM decreased by 95%. In Case 3, NIFM decreased by 56% and in Case 6, NIFM increased by 1% at the non-stabilized fracture line. CONCLUSION: Stabilizing all rib fractures significantly improves CWS. Not stabilizing both fractures of a flail segment worsens motion at the non-stabilized fractures. LEVEL OF EVIDENCE: Therapeutic/Care Management; Level IV.