Schofield surgery SAQs Flashcards
What is a diverticulum?
An outpouching of mucosa through the muscle wall.
Which section of colon are diverticula most common in?
Sigmoid colon
Higher intraluminal pressure as the majority of water has been reabsorbed from the faeces.
Define diverticulosis, diverticular disease and diverticulitis.
Diverticulosis - presence of diverticula in the GI, asymptomatic (usually found incidentally on imaging)
Diverticular disease - symptomatic diverticula
Diverticulitis - inflammation of diverticula
Investigations in diverticulitis?
FBC
CRP
Blood cultures
CT scan
Mainstay treatment of diverticulitis?
Analgesia
Abx
Adequate hydration
Complications of diverticulitis?
Perforation
Bleeding
Abscess
Strictures
Fistulas
Hernia definition
Protrusion of a structure through the wall of a cavity in which it is usually contained.
Location of inguinal vs femoral hernia?
Inguinal - superior and medial to pubic tubercle
Femoral - inferior and lateral to pubic tubercle
How do indirect inguinal hernias occur?
During foetal development, the testes descend following the processus vaginalis (attached by the gubernaculum).
If the connection to the peritoneal cavity fails to close, then a patent processus vaginalis is present through which indirect inguinal hernias can occur.
Complications post inguinal herniotomy? (open mesh repairs and laparoscopic mesh repairs)
Recurrence
Wound site infection
Mesh infection
Damage to intestines/bladder/spermatic cord
Hydrocele
Symptoms of haemorrhoids?
Bright red PR bleed
Anal itching
Mucous
Rectal fullness
Pain
Soiling
Investigations for haemorrhoids?
FBC
Proctoscopy
Sigmoidoscopy
Two procedures to manage haemorrhoids?
Rubber band ligation
Haemorrhoidectomy
Complication of haemorrhoids?
Ulceration
Stricture
Thrombosis
Infection
Anaemia
Skin tags
Acid-base disturbance associated with acute mesenteric ischaemia?
Metabolic acidosis
Acid-base disturbance in vomiting
Metabolic alkalosis with normal anion gap
Acid-base disturbance in diarrhoea
Hyperchloremic metabolic acidosis
Blood test abnormalities in acute mesenteric ischaemia?
Raised wcc
Raised lactate
Raised Hb
Raised amylase
Definitive imaging in Acute Mesenteric ischaemia?
CT abode with IV contrast
Aims of surgery for Acute Mesenteric ischaemia?
Resection of necrotic bowel
Revascularisation
Initial management of Acute Mesenteric ischaemia prior to surgery?
IV fluids
Antibiotics
Analgesia
Function of red pulp of spleen?
Acts as the filter and destroyed defunct red blood cells
Function of white pulp of the spleen?
White pulp is lymphoid tissue which acts as part of the body’s immune system.
Indications for splenectomy?
Trauma
Spontaneous rupture
Hypersplenism
Neoplasia
Cysts
Splenic abscess
Long term management post-splenectomy?
Lifelong prophylactic antibiotics
Vaccinations (pneumococcal and annual influenza)
Blood film post-splenectomy will show?
Howell-Jolly bodies
Target cells
What are Howell-Jolly bodies?
RBC in which the nuclear remnant is still seen
Causes of acute pancreatitis?
Alcohol
Gallstones
Trauma
Steroids
Scorpion sting
ECRP
Hypercalcaemia
Early complications of pancreatitis?
Shock
ARDS
Sepsis
DIC
Renal failure
Late complications of pancreatitis?
Pancreatic pseudocyst
Pancreatic necrosis
Abscess
Chronic pancreatitis
Acute pancreatitis management?
IV fluids
Analgesia
NG tube
Catheterisation
4 main features of SBO?
Constipation
Vomit
Colicky abdo pain
Distension
4 common causes of SBO?
Adhesions
Hernias
Tumour
Volvulus
Types of gallstones?
Pigment stones
Cholesterol stones
Mixed stones
Risk factors for gall stones?
Fair (Caucasian)
Forty
Fertile
Fat
Female
Acute cholecystitis investigations?
FBC
CRP
LFTs
Amylase
Trans-abdo USS
Acute cholecystitis management?
NBM
IV Fluids
Analgesia
Abx
Laparoscopic cholecystectomy <72hours
4 lobes of the liver?
Right
Left
Caudate
Quadrate
Which ligament divides the anterior of the liver into the two anterior lobes?
Falciform ligament
Cancers that commonly metastasise to the liver?
GI tract
Breast
Lung
Uterus
Causes of hepatocellular carcinoma?
Viral hepatitis
Cirrhosis
COCP
Tumour marker raised in hepatocellular carcinoma?
AFP
Causes of acute urinary retention?
UTI
BPH
Constipation
Drugs (anticholinergics, opiates, antidepressants)
Post-anaesthesia
Alcohol
In acute urinary retention, apart from abdo exam what other exam should be performed?
Peripheral nervous system
Assess for CES
Important things to undertake with regards to post-catheterisation care? (acute urinary retention)
Document residual volume
Take specimen for CSU
How does the catheter drainage vol help distinguish between acute and chronic urinary retention?
Chronic is more likely to hold higher vol and be painless 1.5L+
Following catheter drainage of patient with acute urinary retention if lots of urine produced what is this called?
Post-obstructive diuresis
> 200ml per hour for 2 consecutive hours OR 3L in 24 hours
Monitor urine output hourly and replace losses with IV fluids.
Drugs used in BPH?
Tamsulosin: alpha-1 receptor antagonist. Relaxes prostatic smooth muscle
Finasteride: 5-alpha reductase inhibitor. Reduces prostate size.
Causes of macroscopic haematuria?
UTI
Renal tract trauma
Renal tract tumour
Renal stone
Schistosomiasis
Nephritic syndrome
Investigations for macroscopic haematuria (non-infective)?
Renal tract USS
Flexible cystoscopy
Urine cytology
Risk factors for bladder cancer?
Smoking
Aromatic amines
Schistosomiasis
Cyclophosphamide
Management of bladder cancers?
TURBT - transurethral resection of bladder tumour
Radical cystectomy
Where may bladder tumour metastasise?
Local (pelvic structures):
Uterus
Rectum
Pelvic side wall
Haematogenous:
Liver
Lungs
Bone
Lymphatic: Iliac and paraaortic lymph nodes.
What is the definition of sensitivity vs positive predictive value?
Sensitivity - number of people who have the disease who test positive
Positive predictive value - number of positive tests who actually have the disease.
What effect does low PPV have on patients?
More patients would have to undergo unnecessary secondary (possibly invasive) investigations for a disease that they don’t have.
Criteria for a screening programme?
- Course of the disease should be known
- Early symptoms should be present in the individual
- Treatment for the condition should be available to all patients
- Prompt treatment should be of more benefit than delayed treatment
Score to evaluate prostate cancer prognosis?
Gleason
Active surveillance meaning in prostate cancer?
Regular monitoring of PSA to assess if disease has progressed.
Layers of the scrotum?
Skin
Dartos fascia (scarpa)
External spermatic fascia
Cremaster muscle
Internal spermatic fascia (tunica vaginalis)
Tunica albuginea
Why is it BILATERAL orchidopexy for testicular torsion?
Protect the other testis from later episode of torsion.
Why might someone have raised Hb in renal tumours?
Some renal tumours are associated with increased EPO release that causes a raise in Hb.
Risk factors for renal cell carcinoma?
Smoking
Dialysis
Hypertension
Obesity
Polycystic kidneys
Von Hippel-Lindau disease