Questions for the oral or written part of the examination, credit-test, differentiated credit-test DIFFERENTIAL DIAGNOSTICS 1. Differential diagnosis of edema syndrome. 2. Differential diagnosis of rheumatism and bacterial endocarditis. 3. Differential diagnosis of pain in myocardial infarction and aortic stenosis. 4. Differential diagnosis of pain in myocardial infarction and aortic valve insufficiency. 5. Differential diagnosis of typical and atypical forms of myocardial infarction. 6. Differential diagnosis of pain syndrome in angina pectoris and vertebral cardialgia. 7. Differential diagnosis of pain in chronic pancreatitis. 8. Differential diagnosis of angina and focal myocardial infarction. 9. Differential diagnosis of cardiac and bronchial asthma. 10. Differential diagnosis of endocrine arterial hypertension. 11. Differential diagnosis of the syndrome of inflammatory infiltration of the lung tissue. 12. Differential diagnosis of purulent-obstructive bronchitis and bronchiectasis. 13. Differential diagnosis of cavities in the lungs. 14. Differential diagnosis of obstructive bronchitis and bronchial asthma. 15. Differential diagnosis of pneumonia, taking into account the etiological factor. 16. Differential diagnosis of pain in gastric ulcer and duodenal ulcer. 17. Differential diagnosis of chronic gastritis type "a" and "b". 18. Differential diagnosis of intestinal dyspepsia. 19. Differential diagnosis of pneumonia and lung abscess according to clinical data. 20. Differential diagnosis of gastric secretion according to clinical data. 21. Differential diagnosis of unstable angina. 22. Differential diagnosis of focal and lobar pneumonia. 23. Differential diagnosis of hypertensive crises. 24. Differential diagnosis of constipation. 25. Differential diagnosis of jaundice. 26. Differential diagnosis of pain in chronic cholecestitis. 27. Differential diagnosis of hemodynamic arterial hypertension. 28. Differential diagnosis of renal arterial hypertension. 29. Differential diagnosis of chronic hepatitis. 30. Differential diagnosis of liver cirrhosis. URGENT CARE 1. Emergency care for pulmonary hemorrhage. Localized pulmonary bleeding usually requires local treatment, like bronchoscopic therapy, bronchial artery embolization or surgery. Diffuse alveolar haemorrhage must be treated systemically, i. e. by immunosuppressive therapy in cases of vasculitis or by medical treatment of coagulation disorders. Tracheal suction, oxygen, positive pressure ventilation, and correction of underlying abnormalities such as disorders of coagulation. A blood transfusion may be necessary. 2. Gastroduodenal bleeding. Causes, clinic. Therapist tactics in emergency care CAUSE: in DU bcoz of high vasculature,GU, Hemorrhagic gastropathy & erosions, MalloryWeiss syndrome, Gastric varices, reflux oesophagitis. Mallory-Weiss syndrome: Laceration of the distal esophagus and proximal stomach during vomiting, retching, or hiccups. CLINICAL: o constipation, then melena, vomiting with coffee ground mass o Melena shows chronic relapse of bleeding o After bleeding, pain disspear bcoz of its alkaline rXn that neutralizes stomach’s acid. o Presence of weakness, vertigo, pale skin, tachycardia, dyspnea. TACTIC: o Place cold compression on GI region or per os (can put pieces of ice) o Transfusion of crystalloids, colloids RBC mass o Stop bleeding by – vicasol (vit K), detsonone (aggregation of thrombocyte), epsilone amino caproic acid. o Surgical- Fibrogastroduodenoscopy: coagulation of vessels & tamponade of vessels. Resection of stomach & Bilroth 1@ 2 or gastrostomy 3. Asthmatic status. Emergency care at stage i. 4. Asthmatic status. Emergency care at stage ii. 5. Asthmatic status. Emergency care at stage iii. Rehydration eg glucose solution 3-4L daily Correction of electrolyte balance Heparin: improve rheological blood and sputum Euphyllines 6mg/kg Glucocort: depending on stages 1mg/kg Oxygen therapy In 2nd stage, do artificial lung ventilation with bronchial lavage Mechanical ventilation: correct hypoxemia, avoid hyperinflation, decrease VE and tidal volume Manual compression of chest: for hyperinflation Anesthetics, Leukotrien inhibitors 6. Emergency care for paroxysmal arrhythmias in patients with myocardial infarction. If adenosine does not work, atrioventricular (AV) nodal blocking agents like calcium channel blockers or beta-blockers should be used. Patients with symptomatic Wolff-Parkinson-White (WPW) syndrome should not be treated with calcium channel blockers or digoxin 7. Emergency help with hypoglycemic coma. - Quick-acting carbohydrate 15-20 g is given by mouth, either in liquid form (eg, 150-200 ml pure fruit juice - but don't use fruit juice if there is renal failure) or as granulated sugar (two teaspoons) or sugar lumps. - 5-7 Dextrosol® tablets or 4-5 Glucotabs® Gel - may be used. Repeat capillary blood glucose after 10-15 minutes; if the patient is still hypoglycaemic then the above can be repeated (probably up to 3 times). 8. Emergency care for ketoacid coma. Fluid and electrolyte replacement (potassium) Insulin therapy: When your blood sugar level falls to about 200 mg/dL (11.1 mmol/L) and your blood is no longer acidic, you may be able to stop intravenous insulin therapy and resume your normal subcutaneous insulin therapy. Hydration and education 9. The attack of bronchial asthma. Clinic. Relief of attack. CLINICAL SYMPTOMS Divided into 3 stages: 1st: Beginning/Initial Nasal raining Emotional changes Cough Itching Changes of smell/taste 2nd: During attack Expiratory dyspnea Orthopnea/Tripod posture (for easier usage of additional resp mm) Central cyanosis Distant rales 3rd: Stop of attack: Enlargement of sputum volume Stop of dyspnea Weakness Patient wants to sleep EMERGENCY CARE (Oxford 795) Inhalation short activating beta-2 symphatomimetics 10ml, 2.4% solution theophylline IV glucort eg prednisalone 60mg Inhalation glucocort 10. Emergency care for reflex cardiogenic shock. 11. Emergency care for true cardiogenic shock. Emergency care 1. General measure : Complete rest, continuous 60% O2 therapy and analgesics, antianxiety drugs are given. 2. Normal Pulmonary Arterial(or capillary) Wedge Pressure is 15 – 20mmHg. If less than 18mmHg, infusion therapt of fluid is necessary. If more than 25mmHg, Short-acting venous dilator (Glyceryl trinitrate / sodium nitroprusside) is administered IV. 3. if excessive elevation of PAWP inotropic drugs should be administered to reduce it. The goal is to increase contractility (inotropic drug is used) without increased heart rate (Chronotropic drugs not used). Dopamine & Norepinephrine give inotropic and vasoconstriction action that is useful in persistence hypotension. Dobutamine give inotropic and venodilator action may substitute previous drugs once arterial blood pressure is return to normal. 4. if pulmonary congestion occurs, IV frusemide is used. 5. inadequate response to above measure, Myocardial pumping function can be restored by intraaortic balloon counterpulsation to permit recovery of Myocardial function. 6. Last measures are, Myocardial revascularization , lastly, Urgent Heart transplantation. 12. Emergency care for uncomplicated hypertensive crisis. The drugs of choice in treating patients with a hypertensive crisis and eclampsia or preeclampsia are hydralazine, labetalol, and nicardipine (5,6). Angiotensin-converting enzyme inhibitors, angiotensin receptor blockers, direct renin inhibitors, and sodium nitroprusside are contraindicated in treating these patients. 13. Hepatic coma. Clinic. Urgent care. CLINICAL PICTURE Metabolic hepatic coma Jaundice, small liver, encephalopathy, deterioration of consciousness from drowsiness, confusion and disoreientation to unresponsive coma with convulsations, fetor hepaticus, spasticity and extension of arms and legs, plantar response remain flexed, cerebral oedema, infections, GIT bleeding, respiratory arrest, renal failure and pancreatitis Portocaval coma Signs before coma: Patient becomes increasingly drowsy and comatose, fetor hepaticus, constructional apraxia ptt can’t draw or write, decreased mental function, convulsions, nausea, vomiting and weakness, hyperreflexia and ↑ tone TREATMENT Metabolic hepatic coma Ptt in reanimation room Identify and remove possible precipitating cause e.g. drugs, protein diet, infection s etc. Symptomatic therapy Bleeding – vit K, platelets, blood, fresh frozen plasma Infection – antibiotics Respiratory failure – artificial respiration Renal failure – hemodialysis Infusion therapy - correct electrolyte imbalance and detoxification Portocaval coma Ptt in reanimation room Evacuation of bowels, restrict protein intake Identify and remove possible precipitating cause e.g. drugs, protein diet, infection s etc. Give purgation and enemas to empty bowels from nitrogenous substances Infusion therapy – correct electrolyte imbalance and detoxification Give antibiotics 14. Emergency care for complicated hypertensive crisis (pulmonary edema). Diuretics are indicated for patients with fluid overload. Furosemide (frusemide) should be given by slow intravenous injection. Routine use of morphine is not recommended because of its adverse effects. Oxygen should only be administered in cases of hypoxaemia. Inotropic drugs should only be started when there is hypotension and evidence of reduced organ perfusion. In these cases, dobutamine is usually first-line treatment. 15. Emergency care for cardiac asthma. Supplemental oxygen, noninvasive ventilation (NIV), and proper positioning of the patient also are important. Proper positioning, in which the patient stands erect or sits upright with feet hanging off the side of the bed, will result in decreased venous return. Symptomatic improvement in patients with pulmonary congestion is seen with an initial recommended furosemide dosage of 40 mg IV. Some patients may exhibit persistent pulmonary congestion despite aggressive diuresis. In these instances, an IV nitrate (e.g., nitroglycerin) may be used adjunctively in both hypertensive and normotensive patients. 16. Emergency care for pulmonary edema. Diuretics are indicated for patients with fluid overload. Furosemide (frusemide) should be given by slow intravenous injection. Routine use of morphine is not recommended because of its adverse effects. Oxygen should only be administered in cases of hypoxaemia. Inotropic drugs should only be started when there is hypotension and evidence of reduced organ perfusion. In these cases, dobutamine is usually first-line treatment. 17. Emergency care for arrhythmic cardiogenic shock. Anti-arrhythmic drug options for ventricular and atrial arrhythmia suppression, in the setting of cardiogenic shock, are relatively limited. Common class I agents are excluded due to the inherent abnormal cardiac structure and function in the setting of cardiogenic shock. Class III drug options include dofetilide and amiodarone. The other Class III agents, sotalol and dronedarone, are excluded 18. Tactics of treating patients with atrial fibrillation for the first time. The first step is to try to find the cause of the atrial fibrillation. If a cause can be identified, you may only need treatment for this. * Anti-arrhythmics * Beta blocker * Ca channel blocker * Nifedipine 19. Tactics of treating patients with bradyarrhythmias in myocardial infarction. 20. The main indications for thrombolytic and anticoagulant therapy of patients with myocardial infarction. Indications Clinical history and presentation strongly suggestive of myocardial infarction within 6 hours plus one or more of:1 mm ST elevation in two or more contiguous limb leads2 mm ST elevation in two or more contiguous chest leadsNew left bundle branch block2 mm ST depression in V1-4 suggestive of true posterior myocardial infarction Patients presenting with above within 7-12 hours of onset with persisting chest pains and ST segment elevation Patients aged <75 years presenting within 6 hours of anterior wall myocardial infarction should be considered for recombinant tissue plasminogen activator 21. Principles of treatment of patients with bronchial asthma. EMERGENCY CARE (Oxford 795) Inhalation short activating beta-2 symphatomimetics 10ml, 2.4% solution theophylline IV glucort eg prednisalone 60mg Inhalation glucocort BASIC TREATMENT ACCORDING TO STEPS 1st step: Stop contact with origin, and use inhalants of beta-2 agonists (eg ventalin no more than 4x a day) and NSAIDS (intal, keto) 2nd step: Inhalation of beta-2 agonists (short activating) for every day and also antiinflammatory drugs eg intal, tyled 3rd step: All drugs in 2nd step + inhalation of glucocorticosteroids 200-300 microgram daily eg becodisk + bronchodilators (long activating) eg salmetarol 4th step: All drugs in 3rd step + inhalation of glucocorticosteroids 800-1200 micrograms daily + bronchodilators (long activating) + systemic/parallel glucocort. 22. Tactics of treating patients with myocardial infarction without st-segment elevation. Consists of two components: to alleviate the patient's complaints of pain and anxiety and to prevent recurrences of ischemia and progression to (or to limit) myocardial infarction Drug treatment routinely includes β blockers, which reduce myocardial oxygen demand by reducing heart rate and blood pressure and reduce the risk of arrhythmias and recurrent ischaemia. Sedatives and analgesics may be used with the same goals, by reducing anxiety and pain. Vasodilators, such as nitrates and calcium channel blockers, are used to reduce the dynamic (spastic) component of coronary obstruction, and to lower blood pressure 22. Tactics of treating patients with myocardial infarction with st segment elevation. Antianginal drugs i.) Nitrates should be given 1st sublingually or by buccal spay (0.3-0.6mg). If pain persists after 3doses given 5minutes apart, IV nitroglycerine (5-10microgram/min) given. The rate of infusion can be increased to 10microgram/min every 3-5minit until symptoms are relieved. ii.) Beta adregernic blockers : IV beta blockers (Metoprolol/Esmolol) followed by oral beta blockers targeted to heart rate of 50-60beats/min. Analgesics If pain persist, morphine sulfate 1-5mg IV can be given every 5-30minutes. Antithrombotics Anticoagulant i.) Heparin (unfractioned heparin) – Bolus 60-70 U/kg (max 5000 U) IV followed by infusion of 12-15 U/kg/hour. Antiplatelet - Example : Aspirin, Dipyridamole - These could be combined together with beta-blockers & ACEinhibitors. 23. Tactics of relief of pain in myocardial infarction. LOOK ABOVE ANALGESIC AND ANTIANGINAL 24. Pulmonary embolism. Algorithm urgent action. 25. Principles of treatment of patients with pneumonia. Pathogenetic Treatment 1. Mild community acquired Amoxicillin 500mg, 3 times daily 2. Severe community acquired Cefuroxime 1.5g, 3 times daily Erythromycin 1.0g, 4 times daily 3. Atypical pneumonia Erythroycin 500mg, 4 times daily 4. Hospital acquired Cefuroxime 1.5g 3 times daily 26. Emergency aid in case of sudden death (asystole, ventricular fibrillation, tampon-de-heart) 27. Intoxication with cardiac glycosides. Urgent care. DIGOXIN IMMUNE FAB, OXYGEN THERAPY, FLUIDS 28. Tactics of management of patients with complications of peptic ulcer disease (perforation, penetration, pyloric stenosis) 30. Treatment of ascites in patients with liver cirrhosis. Tense ascites is treated by paracentesis, followed by albumin infusion and diuretic therapy. Treatment options for refractory ascites include repeated paracentesis and transjugular intrahepatic portosystemic shunt placement in patients with a preserved liver function LABORATORY-TOOL DIAGNOSTICS 1. Laboratory syndromes in chronic hepatitis. - CYTOLISIS, SPLENOMEGALY, HEPATODEPRESSION. 2. Laboratory diagnosis of ketoacidotic coma. - HIGH PCO2, BLOOD PH <7.3, INCREASED SERUM OSMOLARITY 3. Peptic ulcer disease. Direct and indirect radiological signs. - ULCER CRATER, SMOOTH ULCER MOUND WITH FOLDS THAT REACH THE MARGIN, HAMPTOM’S LINE. - IRREGULAR/SHALLOW CRATER, NODULAR/ANGULAR ULCER MOUND, GASTRIC FOLDS DO NOT REACH ULCER MARGIN, CARMAN MENISCUS SIGN 4. Treatment of instrumental methods of research in peptic ulcer disease. - X-RAY, Ba SWALLOING, ENDOSCOPY, TISSUE BIOPSY 5. Basic laboratory data for pneumonia. - SPUTUM SAMPLE, CULTURE TEST, BLOOD ANALYSIS/COUNT, FEV-FVC (total capacity), THROAT/NASAL SWAB TEST, URINE TEST, PLEURA FLUID TEST 6. Radiological methods of research in pneumonia. - PLANE CHEST X-RAY, CT SCAN, MRI 7. Laboratory and instrumental diagnosis of chronic pancreatitis. U/sound - ∆ in size(enlargement),form,density,calcification - edematous,fibrosis,cyst(stones) X-ray : direct-stones, wit contrast – disorders of duodenum ass wit pancreas. a) enlargement of duodenum, ↑duodenal papilla,dislocation&deformation due to enlarge pancreas b)calcification(stones) c) ↑ retrogastric space d)dilated ducts,central loop of small bowel,dilatation of transverse colon Fibroduodenogastroscopy – stones, ∆in Sphincter Odi Endoscopic-pancreato-cholangiography- stones,stenosis in diff levels of tracts Angiography- deformn+dilatation of arteries, abnorm distribution,disappearance of atrteries CT scan- size of organ,edema,calcification of pancreas,cyst, fibrosis,(obstructn of biliary tract:stones),dilated vessels, differentiate wit tumor LAB INVESTIGATION: 1) Blood & biochem analysis – Leucocytosis wit shift to the L,↑ESR,hypochromic anemia, ↑enz:amylase, tripsin, lipase, ↑transaminase,hypercalcemia,∆in tolerance to glucose(glucosuria)in 2’ DM, bilirubin in blood if affectn of the head of pancreas 1) Corprology : Steatorrhea(lipid),Amylorrhea(glu),Creatorrhea (prot) 2) Pancreatic juice Xm 8. Laboratory and instrumental diagnosis of chronic cholecystitis. Instrumental: 1) U/sound : thickening of GB wall >3cm - Shape&size,presence of stones, dislocation,deformation of GB,↓mobility,presence of crystals of cholesterol 2) X-ray:a) Plain - stones b) wit contrast – done thru per os,IV,SC,retrograde pancreato-cholangiography, percutaneous transhepatic cholangiography - winding,narrowing of ducts,deformation of shadow/absence of GB,presence of stones, functional disorder(emptying) 3) CT 4) hepatobiliary scintigraphy 5) thermography wit Tc( ↑isotopes) Lab :1)Blood analysis – leucocytosis,shift to the L,↑ESR,↑acute phase prot,↑α2& γglobulin,↑fibrinogen,↑bilirubin, if present liver prob: ∆in ALT,AST 2) urine analysis unchanged 3) Bile aspiration – 3 portions taken : 1st frm duodenum,2nd frm GB,3rd frm bile duct In the 2nd portion-leucocytosis,mucus,cylinder epithelium,cholesterol crystals, pathological no of bact.,spec. pigmented cells 9. Laboratory and instrumental diagnosis of chronic enterocolitis. 1) X-ray :distension of bowel, abnorm position of plica, fast/slow evacuation of barium, signs of hypotonia, feather-like pattern of mucosa, presence of gas&liquid, info abt motor func, length,position,shape,tone,haustration 2) fibrocolonoscopy :can find atrophic mucosa, could be pale/inflamed wit visible vessels - presence of oedema & mucus covering the mucosa, polyps, ulcers, erosions, diverticula - can take specimens of intestinal mucosa - can diagnose cancer tumor 10. Laboratory and instrumental diagnosis of chronic bronchitis. 1) General blood analysis : leucocytosis shift to the left, ↑ ESR 2) Urine analysis : no changes 3) Sputum examination : vol, character, colour, √ epithelium & neutrophiles in sputum 4) ECG : hypertrophy of the left ventricle and atrium 5) X-ray : enlargement root of the lung & diffusion pneumosclerosis : if develop emphysema, present features of emphysema 6) Fibrobronchoscopy: used for differential diagnosis in cancer & bronchoectatic disease 7) U/S : changes in right heart in case of lung hypertension dev : changes in gas level of blood → decrease O2 level 11. Laboratory and instrumental diagnosis of renal arterial hypertension. Initial identification with ultrasonography, magnetic resonance angiography, or radionuclide imaging Confirmation with renal angiography (also may be therapeutic) Creatinine, GFR 12. Laboratory and instrumental diagnosis of endocrine arterial hypertension. 13. Diagnostic tests for the detection of coronary insufficiency. ECG- signs of LV hypertrophy & sometimes coronary insufficiency. ST changes ( doen sloping ST segment & T inversion), LBBB. ECG can be normal even in severe stenosis. X ray- aortic configuration of heart with LV hypertrophy & post stenotic dilatation of ascending aorta. Auscultation- at apex, dimished S1 due to over filling of LV & prolongation of systole. S2 diminished over aorta & can be inaudible of aortic cusps adhere & are immobile. Rough systolic murmur over aorta & is heard when patients sit in 2nd ICS. Murmur is conducted by blood into carotids & can be heard in the interscapular space & in the neck. This murmur is an ejection systolic murmur that is of crescendo-decrescendo type. US- in US we measure the diameter of the aortic valve orifice. In soft degree it’s 1.2-2cm square, moderate it’s 0.75-1.2 cm square & severe is less than 0.75 cm square. PCG 14. Differential diagnosis of angina pectoris and myocardial infarction according to laboratory data. 15. Basic diagnostic methods in pulmonology. - Spirometry, bronchoscopy, x-ray, US, MRI, FEV-FVC. - Blood count, bacterial culture 16. The main diagnostic methods in cardiology. - ECG, EKG, Holster test, angiography, x-ray 17. Treatment of instrumental data in mitral valve insufficiency (electrocardiography, x-ray, doppler echocardiography). X-ray: LA AND LV ENLARGEMENT, VALVE CALCIFICATION ECG: BIFID P WAVE, LV HYPERTROPHY, ATRIAL FIBRILATION EKG: SHOWS DILATED VALVES, DOPPLER DETERMINE THE VELOCITY OF REGURGITATION 18. Treatment of instrumental data in mitral stenosis (electrocardiography, x-ray, doppler echocardiography). ECG: BIFID P WAVE, P MITRALE, P PULMONALE, RETROGRADE P, ATRIAL FIBRILATION, RV HYPERTROPHY X-RAY: MITRAL CONFIGURATION EKG: EXTENT OF DESTRUCTION, THICKNESS, SIZE OF CHAMBER 19. Ecg recording technique. 20. Treatment of instrumental data for aortic valve insufficiency (electrocardiography, x-ray, doppler echocardiography). ECG: LV HYPERTROPHY, LV OVERLOAD, VETRICULAR ARRHYTHMIA X-RAY: ATRIAL CONFIGURATION, CALCIFICATION, LV HYPERTROPHY EKG: VIGOROUS CONTRACTIONS, DILATED LV, AORTIC ROOT ENLARGEMENT, DYASTOLIC FLUTTERING, REGURGITATION DEGREE 21. Treatment of instrumental data for tricuspid valve insufficiency (electrocardiography, x-ray, doppler echocardiography). 22. Interpretation of instrumental data for stenosis of the aortic orifice (electrocardiography, x-ray, doppler echocardiography). 23. Methods of studying respiratory function, the main groups of indicators. FEV-FVC, spirometry, bronchoscopy, sputum analysis 24. Algorithm of reading ecg 9 STEPS TO ECG INTERPRETATION IS THE RHYTHM REGULAR? CHECK THE QRS SEGMENT OF THE ECG TO DETERMINE IF THE DEPOLARIZATION WITHIN THE VENTRICLES IS REGULAR. ... CALCULATE HEART RATE. ... DIAGNOSE THE P WAVES. ... MEASURE THE P-R INTERVAL. ... MEASURE THE QRS SEGMENT. ... CHECK THE T WAVE. ... NOTE ANY ECTOPIC BEATS. ... DETERMINE THE ORIGIN. 25. Treatment of doppler echocardiography data. EKG: SHOWS DILATED VALVES, DOPPLER DETERMINE THE VELOCITY OF REGURGITATION DOPPLER DETERMINE THE VELOCITY OF REGURGITATION 26. Treatment of fibrogastroduodenoscopy data. Fibrogastroduodenoscopy : 1)Location,size,shape 2)condition of gastric mucosa( ∆ in colour,surface,growths) 3) presence of bile in gastric juice ( if reflux present) 4) height,width,density of folds 5) reveal tumor/ulcers and coagulation of vessels & tamponade of vessels. 27. Interpretation of research data of the pleural fluid. Some pleural fluid and serum markers have shown extremely high diagnostic accuracy in patients with PE; for instance, interleukin-27 (IL-27),12 interferon-gamma13 and adenosine deaminase (ADA)14 pleural fluid levels for tuberculous PE and serum N-terminal pro-brain natriuretic peptide (NT-proBNP) for CHF 28. Additional research methods in hepatology. X-ray, angiography, pancreatic enzymes, 29. Laboratory data for abscess and gangrene of the lungs. 1. Blood pic : ↑ ESR, leukocytosis shift to the left 2. Biochem : ↑ inflmtory prots (C-reactive prots) 3. Sputum exam : 1st stage – not specific 2nd stage – presence of 3 layers (mucous, serous, purulent) 30. Physical and instrumental methods of research vessels