GI Flashcards
What are the signs/symptoms of acute peritonitis ?
- Generalised, severe abdominal pain
- Guarding when palpated
- Rigidity (persistent tightness)
- Rebound tenderness
- Cough will result in pain
- Percussion tenderness.
- Fever
- Vomiting
- Tachycardia
- Hypotension
What is localised peritonitis ?
Localised peritonitis can be caused by an underlying organ inflammation like appendicitis or cholecystitis
What is generalised peritonitis ?
Can be caused by perforation of an organ releasing contents into the abdomen and hence causing inflammation.
What is spontaneous bacterial peritonitis ?
Associated with spontaneous infection of ascities in patients with liver disease. Treated with BSA and has a poor prognosis.
What is the first line of treatment of spontaneous bacterial peritonitis ?
Piperacillin/Tazobam.
Cefotaxamine can also be used
Levofloxacin and metronidazole can be used in penicillin allergy
How is peritonitis diagnosed ?
Clinical features and sample of fluid from the abdomen
What are the Common causative organisms in intra-abdominal infection ?
- Anaerobes (clostridium and bacteroides)
- E.coli
- Klebsiella
- Enterococcus
- Streptococcus.
When are erect CXR indicated in suspected peritonitis?
When looking for signs of perforation like due to a perforated gastric ulcer and pneumoperitenum.
May also have Abdo x ray to look for bowel perforation.
How is peritonitis treated ?
Treatment of underlying cause
IV antibiotics
Morphine
What is acute cholangitis ?
Infection and inflammation of the bile ducts. Surgical emergency and has a high mortality due to sepsis and septicaemia.
What are the two main causes of acute cholangitis ?
- Obstruction in the bile ducts stopping bile flow like gallstones in the common bile duct
- Infection introduced during an ERCP procedure (x ray and endoscopy procedure)
What are the most common bacterial causes of acute cholangitis ?
- Escherichia coli
- Klebsiella species
- Enterococcus species.
What are the components of Charcots triad (acute cholangitis)
- Right upper quadrant pain
- Fever
- Jaundice (raised billirubin)
How is acute cholangitis managed initially ?
- Emergency admission
Need management of sepsis and acute abdomen pain and prep for surgical admission
- NBM
- IV fluids
- Blood cultures
- IV antibiotics
- Seniors
What are the best imaging modalities in imaging acute cholangitis ?
- Abdominal USS scan
- CT scan
- MRCP (most important) this is viewing not diagnostic !!
- Endoscopic USS
Patient will have deranged LFT and raised CRP
How is acute cholangitis managed internationally ?
ERCP can be used to remove stones that are blocking the bile duct. Procedures that can be done with an ERCP are ….
- ERCP can be used to remove stones that are blocking the bile duct. Procedures that can be done with an ERCP are ….
- Cholangio-pancreatography: retrograde injection of contrast into the duct through the sphincter of Oddi and x-ray images to visualise biliary system
- Sphincterotomy: making a cut in the sphincter to dilate it and allow stone removal
- Stone removal: a basket can be inserted and pulled through thecommon bile ductto remove stones
- Balloon dilatation: a balloon can be inserted and inflated to treat strictures
- Biliary stenting: a stent can be inserted to maintain a patent bile duct (for strictures or tumours)
- Biopsy: a small biopsy can be taken to diagnose obstructing lesions
- Treat underlying cause - like in gallstones may need a cholecystectomy.
What can be used in patients with acute cholangitis but ERCP not suitable/unsuccessful ?
In patients where ERCP is not suitable or where ERCP has failed, a percutaneous transhepatic cholangiogram involves insertion of a drain into the bile ducts and relieves immediate obstruction. A stent can be inserted to give longer lasting relief.
What is an ERCP ?
Endoscopic retrograde cholangiopancreatography. Combines USS and endoscopy to remove gallstones.
What is acute cholecystitis ?
Inflammation of the gallbladder, often caused by the blockage of the cystic duct preventing the gallbladder from draining.
What is one of the key complications of gallstones ?
Acute cholecystitis
Apart from gallstones, what are some of the other possible causes of acute cholecystitis ?
TPN or ICU admission, as gallbladder is not being stimulated by food regularly and emptying hence resulting in a build up of pressure.
How does acute cholecystitis present ?
- RUQ pain that may radiate to the right shoulder.
- Fever
- Nausea
- vomiting
- Tachycardia/tachypnoea
- RUQ tenderness
- Murphys sign
- Raised IFLM and WCC
What is murphys sign suggestive of ?
Acute cholecystitis
How is Murphys sign tested ?
- Hand on RUQ and apply pressure
- Ask the patient to take a deep breath in
- Gallbladder will move downwards and come into contact with the hand on inspiration and this will result in pain and stoppage of inspiration
A positive sign is if this elicits pain
What imaging modalities are used in diagnosing acute cholecystitis ?
- 1st step (abdominal USS)
- 2nd MRCP if the stone is not detected on the bilary tree on USS but is suspected due to signs like raised bilirubin or bile duct dilation.
What are the signs of acute cholecystitis on abdominal USS ?
- Gallbladder wall thickening
- Stones or sludge in the bladder
- Fluid around the gallbladder.
How is a patient with acute cholecystis managed initially ?
Patients firstly need emergency admission for investigations and management. Conservative ….
- Conservative - NBM, IV fluids, Antibiotics, NG tube if needed for vomiting.
How are patients with acute cholecystitis managed ?
Cholecystectomy (removal of the gallbladder), usually performed during acute admission, within 72 hours of symptoms. Sometimes may be delayed to allow the acute inflammation to settle.
What are some of the possible complications of acute cholecystitis ?
- Sepsis
- Gallbladder empyema
- Gangrenous gallbladder
- Perforation.
What is gallbladder emphyema ?
Gallbladder empyema is infected tissue and pus collecting in the gallbladder.
Managed with IV antibiotics and cholecystectomy/cholecystostomy.
What is the definitive management of acute cholecystitis ?
according to NICE guidelines, a laproscopic cholecystectomy should be offered within one week. All patients with an acute flair of cholecystitis should have this
Untill then IV analgesia, antibiotics and fluids should be given to the patient.
What is the most common bacterial cause of acute cholecystitis ?
E.coli
What are the three most common causes of acute pancreatitis ?
- Gallstones
- Alcohol
- Post ECRP
Why does alcohol cause pancreatitis ?
Alcohol is directly toxic to pancreatic cells and this results in inflammation.
Why do gallstones cause pancreatitis ?
Caused by gallstones getting trapped at the end of the bilary system and blocking the flow of bile and pancreatic juice into the duodenum.
What are some of the other causes of pancreatitis (apart from the key 3 ) _ I GET SMASHED.
- Idiopathic
- Gallstones
- Ethanol
- Trauma
- Steroids
- Mumps
- Autoimmune
- Scorpion sting
- Hyperlipidaemia
- ERCP
- Drugs ( diuretics like furosemide, thiazide and Asathioprine)
How does acute pancreatitis present ?
- Acute onset of pain
- Severe epigastric pain that radiates to the back.
- Vomiting
- Abdominal tenderness
- Systemically unwell (low grade fever and tachycardia)
What marker will be raised a lot in acute pancreatitis ?
amylase 3x the upper limit and lipase.
CRP will also be rised
What scoring system is used to monitor the severity of acute pancreatitis and what are the three divisions ?
The modified Glasgow criteria
- 0 or 1– mild pancreatitis
- 2– moderate pancreatitis
- 3 or more– severe pancreatitis
What are the different divisions of the modified glasgow score (used in pancreatitis assessment)
?
Can be remembered by PANCREAS pneumonic
- P–Pa0< 8 KPa
- A–Age > 55
- N–Neutrophils (WBC > 15)
- C–Calcium < 2
- R– uRea >16
- E–Enzymes (LDH > 600 or AST/ALT >200)
- A–Albumin < 32
- S–Sugar (Glucose >10)
What should happen to all patients that are admitted with pancreatitis ?
Patients can become unwell rapidly. In patients who are moderate or severe, they should be considered for management on the high dependency unit or the ICU.
How is acute pancreatitis managed ?
- Bedside symptomatic management - ABCDE, IV fluids, NBM, analgesia.
- Invasive treatments - ERCP/cholecystectomy in patients who have gallstone pancreatitis.
- Treatment of complications like endoscopic or percutanous drainage of large collections
- ABx if evidence of infection like abscess or infected necrotic area.
- Most patients will improve within a week.
What are some of the possible complications of acute pancreatitis ?
- Necrosis of the pancreas
- Infection in a necrotic area
- Abscess formation
- Acute peripancreatic fluid collections
- Pseudocysts (collections of pancreatic juice) can develop 4 weeks after acute pancreatitis
- Chronic pancreatitis
What would be the typical exam presentation of a patient with acute pancreatitis ?
Patient presenting tachycardic and hypotensive with severe epigastric pain radiating to the back. Associated vomiting. Raised amylase/lipase and CRP
What is the most common cause of chronic pancreatitis ?
Alcohol
What type of DM develops as a consequence of chronic pancreatitis ?
Type 3c
How do patients with chronic pancreatitis present ?
Patients usually have weight loss, loss of appetite, in advanced cases jaundice, symptoms of diabetes and ongoing nausea and vomiting.
What are some of the common complications of chronic pancreatitis ?
- Chronic epigastric pain
- Loss of exocrine funcion (reduced lipase)
- Loss of endocrine function, lack of insulin leading to diabetes.
- Damage and strictures to the duct system leading to obstruction
- Formation of pseudo-cysts and abscesses.
why do patients with chronic pancreatitis get steorrhoea ?
Lack of lipase enzymes can lead to malabdorbtion of fat, greasy stool and deficiency in fat soluble vitamins.
What can be given to patients with chronic pancreatitis to replace pancreatic lipase ?
Creon
How is chronic pancreatitis managed ?
- Abstinence from alcohol and smoking
- Analgesia
- Replacement pancreatic enzymes like creon (lipase). Lack of enzymes due to an obstruction can lead to malabsorbtion of fat, greasy stool (steatorrhoea) and deficiency in fat soluable vitamins
- SC insulin if diabetic
- ERCP with stenting to treat strictures and obstructions.
- Surgery may be required to treat chronic pain, obstruction, psudocysts and abscesses.
- Bilary decompression - Roux - en - Y cholecystectomy.
What is third spacing ?
loss of fluid from the GI tract into the intravascular space. The higher up the intestine the obstruction, the greater the fluid loss.
what type of bowel obstruction is most common ?
Small bowel
What are the three most common causes of bowel obstruction ?
- Adhesions (small) - RF endo and surgery
- Hernias (small)
- Malignancy (lg)
Apart from the big three, what are the other common causes of bowel obstruction ?
Volvulus (lg), diverticular disease, strictures (young person with chrones) and intussusception in young children.
What is the initial imaging investigation in bowel obstruction ?
XRay abdo and chest.
What is a diagnostic investigation for bowel obstruction ?
Ct abdo and pelvis
What are adhesions ?
Scar tissue that bind the abdominal contents together. They can cause kinking or squeezing of the bowel, leading to obstruction in the small bowel typically
What are the main causes of adhesions ?
- Abdominal or pelvic surgery
- Peritonitis
- Abdominal or pelvic infections
- Endometriosis
What is a closed loop obstruction ?
Two points of obstruction along the bowel, meaning there is a middle section sandwiched between the two points of obstruction.
What are the main causes of close loop obstruction ?
- Adhesions - compress two sections of bowel
- Hernias
- Volvulus
- Competent ileocaecal valve (does not allow any movement back into the ileum from the caecum). When there is a lg bowel obstruction and this valve, a section of the bowel becomes isolated
What are the main causes of close loop obstruction ?
- Adhesions - compress two sections of bowel
- Hernias
- Volvulus
- Competent ileocaecal valve (does not allow any movement back into the ileum from the caecum). When there is a lg bowel obstruction and this valve, a section of the bowel becomes isolated
What is there an increased risk of in closed loop obstruction ?
Due to the nature of this obstruction, there is an increased risk of ischaemia and perforation.
How does bowel obstruction present ?
- Vomiting (green bilious vomiting)
- Abdominal distention
- Diffuse abdominal pain
- Rebound tenderness and rigid tenderness - Sign of peritonitis and indication for urgent surgical intervention as risk of perforation
- Absolute constipation and lack of flatulence
- Tinkling bowel sounds in early bowel obstruction.
What is rebound tenderness and rigid tenderness a sign of in bowel obstruction and what does it indicate ?
- Peritonitis (perforation)
- Immediate surgical intervention
How do you distinguish between small and large bowel on abdominal x ray ?
- Valvulae conniventes - small bowel and form lines that extend the full width of the bowel.
- Haustra - Lg bowel, do not extend the whole length of the bowel.
What will be present in CXR, AXR in bowel obstruction ?
Dilated bowel
Pneumoperitoneum in perforation
How is bowel obstruction managed before surgical intervention ?
NG tube with free drainage to allow stomach contents to freely drain
Drip and suck
- ABCDE
- Patients may develop - Sepsis, bowel perforation, bowel ischaemia and hypovolaemic shock.
- NBM
- IV fluids
What will be present on investigation (bloods and imaging) in bowel obstruction ?
- Metabolic alkalosis
- Bowel ischaemia - raised lactate
- Electrolyte imbalance
- Pneumoperiteneium.
- Dilated bowel loops
How are patients managed surgically in bowel obstruction ?
- Exploratory surgeryin patients with an unclear underlying cause
- Adhesiolysisto treat adhesions
- Hernia repair
- Emergency resectionof the obstructing tumour
Stents can also be inserted in patients with obstruction due to tumour.
CAN BE MANAGED CONSERVATIVE
What is hereditary haemochomatosis ?
Disorder of iron metabolism, where excessive iron accumulates in the body and is deposited (liver, heart, joints, pituitary, pancreas and skin).
Where is the gene mutation in hereditary haemochromatosis ?
HFE gene
What are some of the possible complications of hereditary haemochromatosis ?
- Liver fibrosis
- Liver cirrhosis
- Hepatocellular carcinoma
- Myocardial siderosis
- Cardiomyopathy (improves in response to venesection)
- DM
- Skin hyperpigmentation ( improves in response to venesection)
- Arthropathy.
What are the clinical features of hereditary haemochromatosis ?
- Bronze skin
- Type 2 DM
- Fatigue
- Joint pain
- Testicular atrophy (due to liver cirrhosis)
- Hepatomegaly.
- Liver cirrhosis
- Adrenal insufficiency
What is the characteristic skin change in hereditary haemochromatosis ?
Bronze skin
What tests can be used to aid diagnosis in hereditary haemochromatosis ?
-Raised serum ferritin
- Raised transferrin saturation
-Deranged LFTs
What investigation (GENE) gives a definitive diagnosis of hereditary haemochromatosis ?
HFE gene defects
How is hereditary haemochromatosis managed ?
Primary therapy - Phlebotomy/venesection. Stimulates erythropoiesis and mobilises iron from parenchymal cells and other storage sites.
How is hereditary haemochromatosis managed ?
Primary therapy - Phlebotomy/venesection. Stimulates erythropoiesis and mobilises iron from parenchymal cells and other storage sites.
How can hereditary haemochromatosis managed with medication ?
Desferrioxamine - iron chelating agent
Why should vitamin C be avoided in hereditary haemochromatosis ?
It increases the body rate of absorbtion of iron