acute liver failure
DESCRIPTION
ACUTE LIVER FAILURE. JM. JM male 10yrs referred from Kanyama health centre for further management of a patient with gen body swelliing and abd distension Presented with Headache 3/52 Yellow discoloration of eyes 3/52 Fever 2/52 Diarrhea (yellow stool) 3/7 and vomiting 5/7 ago - PowerPoint PPT PresentationTRANSCRIPT
ACUTE LIVER FAILURE
JM JM male 10yrs referred from Kanyama health
centre for further management of a patient with gen body swelliing and abd distension
Presented with Headache 3/52 Yellow discoloration of eyes 3/52 Fever 2/52 Diarrhea (yellow stool) 3/7 and vomiting 5/7 ago Abd pains+ Appetite +- Swelling of feet 2/7 NO H/O TRAVEL
Review of Systems
GUT – frequencyo, dysuriao
CNS – seizureso, personality changeso
Resp – cougho, difficulties breathingo
CVS – palpitations Skin – no h/o itchy skin
PMHx and Drug Hx
Past hx unremarkable – DMo, asthmao, TBo, RVDo, epilepsyo
Treated with tricholine citrate syrup and ampicillin capsules
No known drug allergies
Family and Social Hx
1st born in a family of 3. No h/o paed death.
No FHx of DMo, asthmao, TBo, RVDo, epilepsyo
Child is in grade 3 Mom is a domestic worker and dad
is a bus-driver.
Physical exam
Generally ill-looking, with a puffy face Severely jaundiced, pale, not cyanosed Afebrile Not in Resp distress Vitals: temp: 36.4 HR: 80bpm. RR: 20/min RBS 3.9mmol/l Chest: clear CVS: S1S2 normal P/A: distended, soft, non-tender, fluid-
thrill positive. Lo So
Urinalysis – bilirubin +++, glucose neg, SG 1020, pH 6.0
U/S from local clinic suggested cholecystitis, fatty liver and ascites
RDT – (for malaria) negative
IMPRESSION: Typhoid fever r/o SCD r/o EPTB
Plan
ADMIT FBC/DC, solubility test, LFTs, lipid
profile, group & save, HBsAg Repeat U/S scan CXRay Urine M/C/S Stool M/C/S Antibiotics- xpen, ciprobid Mebendazole, multivit, FA
Day 2 - 6
Fevers +++ Stools not pale but quite bulky Xmatched and received BT on day 4 Ciprobid continued
Day 7
UTH u/s done: incompletely done Patient noted to be in shock in the
afternoon. Responded to normal saline and dextrose
??hypoglycaemia….Noted absence of glucostix on the ward
Day 8
Noted conjugated hyperbilibunaemia and rise in hepatic enzymes > 5 times
∆∆ r/o malignancy: lymphoma or hepatoma
Suspected hepatic failure and encephalopathy
Ordered: 10% dextrose infusion, low protein diet, oral gentamycin, peripheral smear, clotting profile, α-feto protein, repeat LFTs, CT scan abd, surgical input after CT.
Day 10 – consultant’s notes Noted poor improvement in clinical
condition Patient responding to name No hepatic flap Heard a grade 4 murmur loudest
ULSB with lod P2 Impression: Hepatitis with CHD
with ?SABE Ordered repeat U/s, f/up HBsAg,
HCV, LFTs. To do ECG and Echo
Day 9 - 10
On day 9 Patient sent back from CT because was not prepared. Condition noted to be bad too – restless, irritable and not able to communicate verbally
Day 10: Patient started bleeding early hours of the morning
Certified dead at 07:55hrs
Lab results15/12/2014
18/12/201
23/12/2014
27/12/2014
Hb 12.7 10.6 9.8Plt 152 85 101WCC 6.30 9.40 6.80
HBsAg NRBS No MPS
seen
Urea 2.3Creatinine
25
Bilirubin (D)
281
Bilirubin (T)
382 95
Enzymes AST/ALT
658/502 396/253
Albumin 30 25
ACUTE LIVER FAILURE
DEFINITION
Acute liver failure is defined as "the rapid development of hepatocellular dysfunction, specifically coagulopathy and mental status changes (encephalopathy) in a patient without known prior liver disease".
ALF indicates that the liver has sustained severe damage (loss of function of 80-90% of liver cells).
One scheme defines "acute hepatic failure" as the development of encephalopathy within 26 weeks of the onset of any hepatic symptoms.
This is sub-divided into: “fulminant hepatic failure", which requires
onset of encephalopathy within 8 weeks "subfulminant", which describes onset of
encephalopathy after 8 weeks but before 26 weeks.
Another scheme defines "hyperacute" as onset within 7 days, "acute" as onset between 7 and 28 days, "subacute" as onset between 28 days
and 24 weeks
Functions of the liver
Is the largest gland in the body Produces bile that enters the
duodenum via bile duct Synthesize Proteins and clotting factors Synthesizes cholesterol Regulates blood glucose level in body Metabolic function- glycogenesis,
glycogenolysis, gluconeogenesis)
Deamination of amino acids and converts ammonia to urea
Detoxifying chemical agents and poisons
Conjugates bilirubin Immunological function
AETIOLOGY
parac
etamol
drugs
hep b
hep a
autoi
mm
ischa
emia
wilsons
budd
-chiar
i
pregn
ancy
other
unkn
own
050
100150200250300 262
7647
22 35 29 15 8 4 22
90
USA registry N=610
Clinical features Recent viral hepatitis or recent drug/toxic
ingestion Lethargy, nausea, vomiting, fever, abd pains,
anorexia Jaundice Hepatic encephalopathy (minor beh, motor
problems then confused, slurred speech then deep coma
Episodes of bleeding Cardiac arrhythmias and hypotension Rapidly decreasing hepatic size is ominous
PATHOGENESIS
Impaired hepatocyte regeneration, altered parenchymal perfusion, endotoxemia, and decresed hepatic reticuloendothelial function
Hepatocyte necrosis is the common pathway with effects on hepatic synthetic function, excretory and detoxifying functions
Hepatic encepalopathy – multifactorial…. Ammonia theory Synergism theory False neurotransmitter theory GABA (gamma-amino butyric acid )
neurotransmission theory
Labs….
Elevation of both conjugated and unconjugated bilirubin
Aminotransferases raised Indices of hepatic function are
altered (PT>50 secs or INR>4 have been assoc with poor prognosis)
Thrombocytopaenia
Treatment
Mainly supportive Coagulopathy: vit k, platelets, ffp, blood
and H2-receptor blockers Prophylax against bacterial and fungal
infections Electrolyte imbalance Dextrose reducing ammonia load (reduce protein
load, sterilize the gut) Reducing increased ICP
Treating hepatic coma
ICU care Endotracheal intubation and mech
ventilation Electrolytes and glucose by IV
Liver transplant
Indications Acute liver disease Chronic liver disease Primary biliary cirrhosis Autoimmune hepatitis Alcoholic liver disease Primary metabolic conditions (wilsons,
haemochromatosis, a antitrypsin deficiency
Contraindications to liver transplant… Active sepsis Malignancies spread beyond the liver Patient not psychologically ready Metabolic condition
Relative contraindications Age>65yrs Anatomical considerations Hepatocellular carcinoma:
PROGNOSIS Without liver transplant, mortality is greater than 80%, but
with transplant some series reporting a survival rate of approximately 60%.
The risk of mortality increases with complications, which include cerebral edema, renal failure, adult respiratory distress syndrome (ARDS), coagulopathy, and infection.
The etiologic factor and the development of complications are the main determinants of outcome in acute liver failure.
ALF caused by acetaminophen has a better prognosis
Patients with stage 3 or 4 encephalopathy have a poor prognosis.