LIVER Flashcards
HEPATIC INSUFFICIENCY SYNDROME: Definition
impairment of the liver f(x) as a result of severe aggression afecting 70 - 80% of the hepatic functional area
- F(x) of liver
- Role of liver in Carbohydrate Metab
- In lipid metab
- Fat volatile acids
- In proteic metab
HEPATIC INSUFFICIENCY SYNDROME: F(x) of liver
- Metab regulation: glu, lip, prot
- In metab of hmnes
- Urea synthesis, uric acid
- Biliary secretion
- Detox of various metabolites
- Blood reservoir
- Deposit for vitamins and minerals
HEPATIC INSUFFICIENCY SYNDROME: Carb Metab
- Glicogen transformation
- Krebs cycle -> pyruvic ac -> lactic ac_ CO2 + H20+ ATP
- Penthose pathway -> lipid converting pathway
- Uronic ac pathways
HEPATIC INSUFFICIENCY SYNDROME: FVA
- acetic ac: energy resource
- propionic ac: gluconeogenesis
- ac butiric: transforms at the mucosa levels in the rumen in betahidroxibutirate
HEPATIC INSUFFICIENCY SYNDROME: lipid metab
Lipid -> port vein -> liver -> betaoxidation -> acetyl coa -> acetato acetate -> energy prod -> netahidroxibutirate
2acetylcoa …. cumulative energy-> betahid= ketone bodies
HEPATIC INSUFFICIENCY SYNDROME: prot metab
- Sinthesize plasmic prot: albumin, globulin, fibrinogen, prothrombin
- NH3 resulting from the deamination from aa and the absorbed from colon / rumen are transformated into urea/uric ac in birds in the liver
- Permanent exchange of aa w blood and tissues
HEPATIC INSUFFICIENCY SYNDROME: ETIOLOGY
Toxic:
- wasp/bee venom, carbon tetrachloride, metals (Cu, Zn, P, Fe), organochlorine pesticides
- paracetamol, aspirin, ketocolazole (dog/cat), just cat glucocorticosteroids, big animals are alcohol and isoflurane and ALL halotane
Biotic agents:
- Viral (PIF, Parvo, Calicivirus, Infectious Anemia…)
- Bact (Salmonelisos, Lepto, Tularemia)
- Parasites (babesia, fasciola, dirofilaria, erlichia)
Others:
- Shock, insomnia, hepaic traumas, organopathies, neoplasm, adquired/genetic portosystemic
COWS: assoc w hepatocellular osteoarthritis due to fatty hepatosis (en dof pregnancty of immediately postp) w fatty cow sdr and lipod mobilization sdr
HEPATIC INSUFFICIENCY SYNDROME: Pathogenesis
Causal factors act on the vascular and parechimatose systems-> tissue and cel chnges + infiltration + necrosis + dystrophy and lately; a conjuctival reaction characteristic of fibrosis/cirrhosis
SMALL HEPATIC INSUFFICIENCY SYNDROME: Clinical Signs
F(x) disturb w/out visible lesions macroscopically and detectable by means of usual examination
Symptoms:
- Reduced voice: weak apetite, weakening, asyhenia
- Low productive capacity
- Increased irritability
BIG HEPATIC INSUFFICIENCY SYNDROME: Clinical signs
Major clinical disorders w dramatic evol expressed by exitation crises
General : tachy/bradi cardia Digestive: vomiting, diarrhea , melen Neurological: disorientation, coma syncope, phtialism in cats, irritability Renal: PDPU, bilirrubinuria Hematological: petechia, bruising, hematoma Hepato/Splenomgaly´ Jaundie, microhepatitis Pruritus
HEPATIC INSUFFICIENCY SYNDROME: Species symptoms
Horse: sleepingness/excitatiability (empty mastications), constipation, jauncice, fotodermatosis
Bov: Cortical deprrssion (ataxia, astenia, bruxism, icteric mucosa, coma ,even death), Hepatic coma may be due hepatic steatosis, assoc w ketosis + parturition + fatty cow sdr
Ov: Cortical depression, tightening teeth, paresis of preestomach, photodermatosis, jaundice
Car: Dig (vomiting, diarrhea, anorexia), nerve disorders, epileptiform seizures
HEPATIC INSUFFICIENCY SYNDROME: Treatment
Dietetic
- Proteins that contaic essential aa
- No indicated FAT
- Carbs to protect their metab
- Fermentable fibers can reduce signs of portal encephalopaty
- Non fermentable for constipation avoidance
- Zn , Vit E (antioxidants)+ K (antihemorrag)
- Vit C assoc w Fe and Cu + Vit B complex
Medicaments
- Restore biliary f(x) Na Bicarb NaMg
- Restore electrolytes KCl
- Restore lipids (lipotrotoc factors)
- For accum of Cu -> penicillamine
Antiinf therapy: NOT for chronic hepatitis, Yes for autoinmune hepatitis, PREDNISON + DEXAMETHASONE ( if E ascitis / edema)
Antifibrotic tto: corticosteroids, interferon , interlukins (immunomodulator), Vit E (antioxidant)
Tto of ascitis and hemorrag cond: Furosemid, Vit K, prepared w Ca
JAUNDICE SDR: Definition
Morbid state: coloring in various yellow shades of the mucus mbs and or the skin as a result of excessivie acumulation of bile pigments in plasma and tissues.
Pseudoicter in case of caroteinemia
Jaundiec of Newborn: mechanical, hepatocelular, helotitic, and newborns or congenitall
Source of bilirrubin: destruction of (mature) erytrocytes in the resticuloendotelial system of bone marrow
JAUNDICE SDR: Bile Components
The bile is produced by the liver and contains a SECRETION product (BILIARY ACID) and an excretion product (BILIARY PIGMENTS)
BILIARY PIGMENTS result from the degradation of Hb in the reticulo-endothelial system (bilirubin and biliverdin) which in the intestine are degraded by the bacterial flora into stercobilin and urobilin which are eliminated by feces
BILIARY ACID derives from Colanic ac. and is represented by COLIC AC. which by CONJUGATION with TAURINE AND GLYCOCOL determines the synthesis of TAUROCHOLIC AND GLYCOLIC AC which forms the basis of the production of BILIARY SALTS
COLESTEROL- is a precursor for ac biliary
Bilirubin is transported in the blood to the liver bound to ALBUMIN and in the liver cell it detaches from this protein and is conjugated with AC GLUCURONIC causing the appearance of hepatic bilirubin
JAUNDICE SDR: Mecanic Icter
Reduction or suppression of bile transit in the extrahepatic bile ducts: obstructions;
- Biliary calculus or stones
- Intrahepatic and intestinal parasitic infestations, fasciola hepatica (gigantica most of the herbivores) or dicrocoelium in swines
- Extrahepatic biliary tract spasms
- Pancreatitis, duodenitis
- Scars, tumors, abdominal adenopathies
Clinical Manifestation
- Yellowing of mucous membranes and tegument
- Disorexy/selective appetite
- Tendency to constipation
- Uncoloured feces , bad smell
- Colurie
- Colalurie
HUMORAL: bilirubin ↑, PA ↑, VSH ↓ , normal transaminases
JAUNDICE SDR: Hepatocelular Icter
Hepatocyte lesions caused by infectious (bacterial, virals) and toxic etiological agents, letting so the bile go into the blood and causing icter
In other cases, blocking intrahepatic bile ducts occurs, in which case the sub pressure-accumulated ,the bile passes through the hepatocytes causing jaundice by “burglary”
Clinical Manifestation
- Mucous coloration in reddish-orange /yellow
- Inappetence to anorexia, asthenia, vomiting
- The sensitive and enlarged liver area
- Initially fever, then hypothermia
- Due to the passage of pigments and bile salts into bradycardia.
- Nervous disorders manifested by excitation or depression, even going to hepatic coma
- Feces are of normal color
- Coluria, collauria, proteinuria
- Liver tests are positive
JAUNDICE SDR: Hemolitic Icter
Hemolytic intensive process with excess of bilirubin formation. It occurs after the destruction of erythrocytes in the vascular bed
Causes
- Poisoning with copper, phenothiazine, arsenic, saponin-rich plants
- Due to the resorption of large hematomas after hemotherapy
- Phosphorus deficiency (postpartum hemoglobinuria at bovines)
- water intoxication
- Hemosporidiosis, infectious processes with leptospira, streptococcus, staphylococcus, clostridium
(Clostridium haemoliticus) infections.
Clinical Manifestations
- Anemia of mucous membranes and skin in white-yellow nuance
- Feces and urine are a more intensely colored, big functions are accelerated
- Hematologic: decrease in hematocrit, hemoglobin, erythrocytes and VEM and VSH increase
- In the case of microscopic hemosporidiosis endo globular parasites and Joly corpuscles (chromatin
residues = regenerative anemia)
JAUNDICE SDR: Neonatal Icter
Can be mechanically due to meconium that it expands at the intestinal level, umbilical infections that can spread in to the bile ducts Toxic (cuprum, plumb) and infectious hepatocellular (viral hepatitis, leptospirosis)
Hemolytic jaundice is the result of incompatibility of the blood group with the fetus by isomic factors derived from the male reproductive system.
In pigs this jaundice can appear in case of repeating too much sexual acts with the same male, for reproduction purpouses .
JAUNDICE SDR: TTO
Higienic:
- Avoiding altered food, moldy, high fat qanitat
- In large animals: feeding of green fodder in summer, good quality winter hay
- In pet: administering low fat soups, sweet cow’s cheese, avoiding spicy foods.
- Administration of sugar beet or fodder beet to large animals and carrots in small animals
Biliary function: stimulates cholagogue and choleretic drugs: Colebil
Glyco-regulating function: stimulate with iso- or hypertonic glucose solutions, calcium chloride, vitamin complex B (B1, B6, B2) and vitamin C
Lipido regulator function : preparations containing lipotropic factors (choline, methionine)
Function proteine reglatoare: arginine, tryptophan, sorbitol,
Combating hemorrhagic conditions : Vitamins K and C. Calcium therapy will also be done
Combating nervous and agitation status : administration of sedatives and tranquilizer
Combating dehydration: Fluid therapy
ACTIVE HEPATIC CONGESTION: DEFINITION
Increased blood flow in the liver, being physiological in intensive efforts / digestion and pathology in poisoning, overheating, direct trauma, infections and at low temperatures
Blood flow causes irritation to the hepatocyte by activating various functions, and when a certain limit is exceeded, it can cause bleeding or leukocyte infiltration, edema, hepatitis, or hepatosis.