Acute Abdomen Flashcards
What are the differences in presentation between mesenteric ischaemia and ischaemic colitis?
Mesenteric ischaemia = sudden onset of severe pain due to total loss of blood supply, caused by thromboembolism. Managed operatively.
Ischaemic colitis = gradual onset of diarrhoea, PR bleeding and pain due to transient loss of blood supply (due to collateralisation). Managed conservatively or operatively.
What is cholecystitis?
When a gallstone becomes impacted in Hartmann’s pouch –> inflammation + oedema –> infected.
Increased pressure causes distension + pain
What are the symptoms of cholangitis?
Charcot’s triad: jaundice + RUQ pain + fever/ rigors
What is Reynold’s Pentad?
Charcot’s triad (jaundice, RUQ pain, fever/ rigors) + confusion + hypotension
What happens when a stone gets stuck in the CBD?
Initially, causes biliary colic (pain).
Then, with complete obstruction, causes obstructive jaundice.
Then, with inflammation, causes cholangitis (pain + jaundice + fever/ rigors)
What is the pattern of pain in appendicitis?
Initially localised to umbilical region, then migrates to RIF
What are the UNMISSABLE diagnoses of acute abdomen?
AI PUPPET:
-AAA
-Ischaemia - mesenteric or MI
-Perforation
-Ulcer
-Pancreatitis
-Pneumonia
-Ectopic
-Torsion - ovarian or testicular)
What are the systems/ diagnoses to consider depending on area of pain in the abdomen?
RUQ = HPB system
LUQ = stomach + spleen
Epigastric = pancreas + ulcer
Lower abdomen = bowel, pelvic organs + kidneys
RIF = appendix
LIF = bowel (diverticulitis)
Which diagnoses typically cause RLQ?
Appendicitis
Mesenteric adenitis (due to inflammation of lymph nodes)
Meckel’s diverticulitis (congenital outpouching of lower intestine, leftover umbilical cord)
What is Rovsing’s sign?
Indicative of appendicitis:
slowly pressing into LLQ and gradually releasing causing pain in RLQ
What is Murphy’s sign?
Indicative of cholecystitis:
inhaling whilst applying pressure to RUQ causing pain (hand comes into contact with inflamed gallbladder)
What is McBurney’s point?
Indicative of appendicitis:
maximal pain 2/3rd of way from navel to right ASIS
Which scores can be used to quantify likelihood of appendicitis?
Alvarado and AIR (on MDCalc)
What is the Psoas test?
Indicative of appendicitis for retrocaecal appendix
= actively flexing hip causing pain (as appendix sits on psoas muscle)
What is the Obturator sign/test?
Indicative of appendicitis
= flexing hip, passively internally rotating the hip to cause pain
What are the risk factors associated with peptic ulceration?
H. Pylori
Smoking, alcohol
NSAID’s + steroids
How is bowel obstruction classified by time?
Acute = short-term, in a patient who has not previously had abdominal surgery, therefore less likely to settle with conservative Mx
Sub-acute = short-term, in a patient who HAS previously had abdominal surgery, therefore more likely to settle with conservative Mx as more likely to be incomplete/ due to adhesions
Chronic = long term; typically seen in patients with incompetent ileo-caecal valve
What are the cardinal features of bowel obstruction?
- Vomiting - as an early sign, indicative of SMALL BO. Worrying if ++ or faeculent
- Colicky abdominal pain - upper = small; lower = large
- Abdominal distension
- Absolute constipation - passing no stool or flatus
What are the causes of bowel obstruction?
Commonest for SBO: hernias, adhesions, cancer
Commonest for LBO: neoplasm, volvulus, diverticular disease
Others: intussusception, IBD
What are the potential complications of bowel obstruction?
Bowel ischaemia
Bowel perforation –> faecal peritonitis
Strangulation –> necrosis
Dehydration + renal impairment
What is the conservative management in bowel obstruction?
‘Drip + suck’ = NGT to decompress + IVI inc. KCl
Analgesia, anti-emetics, VTE prophylaxis
Urinary catheter + fluid balance chart
Where are inguinal and femoral hernias sited?
Femoral = below and lateral to pubic tubercle (through femoral canal/ ring)
Inguinal = above and medial to pubic tubercle
What is an incarcerated or strangulated hernia?
Incarcerated = becomes trapped in the hernia sac and is irreducible, but still viable
Strangulated = vascular supply becomes compromised
What is an indirect inguinal hernia?
The most common inguinal hernia, usually in young males.
When fatty tissue or bowel passes through the deep ring, down the canal, and out the superficial ring. Neck of hernia lateral to inferior epigastric vessels. Usually descends into the scrotum (‘complete’ if it does)
What is a direct inguinal hernia?
Usually in older population, who have weaker abdominal walls
When fatty tissue or bowel passes through the weakness in the abdominal wall (Hesselbach’s triangle) to bulge through the superficial ring. Neck of hernia medial to inferior epigastric vessels.
What is a pantaloon inguinal hernia?
When a direct and indirect inguinal hernia occur on same side of the groin. Two hernia sacs divided by inferior epigastric vessels, so looks like a pair of pantaloons
What is a Lichtenstein procedure?
Open mesh repair of hernias (usually for inguinal)
How are haemorrhoids classified?
1st degree = symptomatic
2nd degree = prolapse but returns spontaneously
3rd degree = prolapse requiring manual reduction
4th degree = prolapse that cannot be reduced
What are the management options for haemorrhoids?
1st degree = conservative - high-fibre diet, good hydration, bulking agents (ispaghula husk), stool softeners (docusate, senna)
2nd degree = para-surgical - injection sclerotherapy, band ligation, topical cryotherapy
3rd-4th degree = surgical - haemorrhoidectomy, stapled haemorrhoidopexy/ PPH, trans-anal haemorrhoidal de-arterialisation,
What is an anal fissure?
A tear or open sore (ulcer) that develops in the lining of the large intestine, near to the anus