Surg: Small Bowel Obstruction: Free MSRA Podcast

🎧Deep Dive: SmallBowel Obstruction – MSRA Surgery EssentialsYou know that stuckfeeling in the gut? That’s our jumping-off point for today’s topic: small bowel obstruction – a surgical emergencyyou absolutely need to know inside out for the MSRA. 🔎What Is It?A blockage in the small intestine that stopsfood, fluid, and gas from moving normally.Two types:• Mechanical – physical blockage (adhesions,hernias, tumours)• Functional – bowel motility failure (e.g.paralytic ileus) ⚠️Causes & RiskFactors✅ Adhesions (from prior surgery – most common)✅ Hernias (can strangulate)✅ Tumours✅ Crohn’s disease (strictures)✅ Volvulus, intussusception, gallstone ileus✅ Post-op ileus, opioid use✅ Bowel malrotation in children 🧠Pathophysiology• Blockage → fluid +gas build up• Bowel stretches →pressure rises• Blood flow iscompromised → ischaemia, necrosis, perforationMnemonic: Blockage → Buildup → Bowel distension → Blood flowcompromise → Bad outcome 🧬Differentials🌀 Large bowel obstruction🦠 Gastroenteritis🔥 Pancreatitis, appendicitis🩺 Mesenteric ischaemia🧪 Perforated ulcer or tumour🧒 In kids: Intussusception, malrotation👩 Women: Ovarian torsion, ectopic 📊Epidemiology• Very common inemergency surgery• Most frequent inolder adults• Recurrence risk ishigh after previous SBO 🩺Clinical Features• Crampy abdominal pain (colicky → constant ifischaemia)• Distension and bloating• Vomiting (early: bile, late: feculent)• Absolute constipation – no flatus/stool• Hyperactive bowel sounds early → absent late 🩻DiagnosisExamination – scars, distension, hernias, soundsX-ray – dilated loops + air-fluid levelsCT with contrast – gold standard for location, cause, complicationsBloods – FBC, U&Es, lactate, group & saveFluids – monitor urine output, correct dehydration 💉Management Overview🔹Drip & suck (NBM, IV fluids, NG tube)🔹Conservative (if partial, no red flags)🔹Surgical (if complete, strangulated, or fails to resolve)🔹Stenting – for malignancy🔹Volvulus – endoscopic decompression (sigmoid), surgery ifneeded🔹Pseudo-obstruction – neostigmine, decompression 🧬Complications❌ Bowel ischaemia → necrosis → perforation → sepsis❌ Shock, AKI, malnutrition❌ Short bowel syndrome (if large resection)❌ High recurrence risk (especially adhesions) ✅MSRA Key Takeaways✔️ Think adhesions, hernias, tumours✔️ SBO = emergency → CT critical✔️ Key symptoms: pain, distension, vomiting, no stool✔️ Early treatment = better outcomes✔️ Red flag signs = prompt surgery 📚Revision Links📝 Notes: https://www.passthemsra.com/topic/small-bowel-obstruction-revision-notes/🧠 Flashcards: https://www.passthemsra.com/topic/small-bowel-obstruction-flashcards/❓ Accordion Q&A: https://www.passthemsra.com/topic/small-bowel-obstruction-accordion-qa-notes/🔥 Rapid Quiz: https://www.passthemsra.com/topic/small-bowel-obstruction-rapid-quiz/🧪 Quiz Bank: https://www.passthemsra.com/quizzes/small-bowel-obstruction/ 🎓 For more high-yield MSRA content, visit:🌐https://passthemsra.com🌐https://freemsra.com