misc

Question 1

when to discontinue renal replacement therapy

Answer 1

urine output more than 450 ml per day

Question 2

are trauma or burn patients sufferring from alcohol intoxication more likely to hav worse prognosis?

Answer 2

although intoxicated trauma patients do not hav worse prognosis intoxicated burn patients hav a 6 times worse prognosis

Question 3

normal lactate pyruvate ratio

Answer 3

10:1

Question 4

daily lactate production

Answer 4

1500 moles

Question 5

sites of lctate production

Answer 5

skeletal musc
skin
rbc brain
itestine

Question 6

sites of lactate clearance

Answer 6

liver
kidneys
heart

Question 7

energy generated by anaerobic glycolysis

Answer 7

32

Question 8

energy generated from lactate metabolism

Answer 8

each glucose molecule generates 2 moolecules lactate which yields 326 kcal each

Question 9

some uncommon causes of hyperlactataemia in the icu

Answer 9

hepatic insuffiency
acute asthma
haematological malignancy

Question 10

what is alkalosis elated hyperlactataemia

Answer 10

alkalosis leads to upregulation of the glycolytic enzymes which will lead to upregulation of lactate production

Question 11

what is carbicarb

Answer 11

bicarbonate is an ineffective buffer at the physiological ph.also it has a co2n content of almost 200 mm hg.carbicarb is a comerciallly available buffer that is a 1;1 ixture of sodi bicarb and disodium carbonate.it has much less co2 content

Question 12

what is the source of ketones in the body

Answer 12

in the absence of carbs lipolysis leads to the formation of fatty acids which are broken down into ketones in the liver

Question 13

what is the predominant ketoacid in blood

Answer 13

beta hydroxy butyrate

acatoacetate reacts with NADH to form betahydroxybutyrate which is the pre doinant ketone body in blood
the ratio of beta hydroxy is upto 3 times in diabetic keto acidosis and 8 tyms in alcoholic ketoacidosis

Question 14

short comung of the nitro prusside reaction

Answer 14

it detects only acetoacetate and not beta hydroxy butyrate which is the pre dominant ketne.hence it is poorly sensitive

Question 15

cut off for positive nitroprusside reaxn

Answer 15

acetoacettefor 3 mmol/l

Question 16

regarding stress ulcer prophylaxis..vap is caused more by h2ra or PPI ?

Answer 16

no difference in vap rates betweeen the two

Question 17

ain is assosciated with

Answer 17

ppi

Question 18

regarding pericardiocentesis,what are the indications

Answer 18

1. any effusion causing haemodynamic compromise
2. large effusions (> 20 mm measured in diastole by echocardiography) without compromise, or for diagnostic reasons.

(Page 241).

Question 19

what are the aqpproaches? what is the most common approach ?

Answer 19

The safest and most common approach is subxiphoid, which avoids the pleural space and the coronary and internal mammary arteries. Other possible approaches include parasternal and apical.

(Page 241).

Question 20

should pericardiocentesis always be image guarded

Answer 20

Fluoroscopic guidance requires the transfer of the patient to the cardiac catheterisation laboratory but has the highest success rate, particularly for small or posterior effusions.

(Page 241).

Question 21

what are the monitoring required during pericardiocentesis

Answer 21

haemodynamic monitoring, ecg to rule out cardiac puncture

Question 22

common inflammatory mediators implicated in septic shock

Answer 22

Pro-inflammatory cytokines commonly implicated in septic shock are IL-1, IL-6 and TNF-.

(Page 136).

Question 23

can intraosseous access be used for giagnostic purposes

Answer 23

it can be used to draw sampples for electrolytes as well as haemoglobin estimation

Question 24

role of amiodarone during cpr in a patient with vf

Answer 24

Amiodarone alone will not cardiovert VF. Its membrane-stabilizing effects will increase the efficacy of subsequent defibrillation.

(Page 19).

Question 25

dose of adrenaline delivered by epipen

Answer 25

.3 mg of 1:1000

Question 26

is the ventricular fibrillation waveform entirely random ?

Answer 26

The VF waveform is not entirely random, having a degree of predictability. (Page 20).

Question 27

whyich is more likely to be cardioverted coarse or fine vf ?

Answer 27

A coarse rhythm is more likely to be cardioverted successfully. (Page 20).

Question 28

what is the primary determinant of successful defibrillation of vf ?

Answer 28

duratiuon of vf

Question 29

most common cause of pea

Answer 29

respiratory arrest

Question 30

when does pulmonary embolism lead to pea

Answer 30

when more thgan 50 % opf the pulmonary vascular tyree

Question 31

dose for paediatric defibrilklation

Answer 31

In children, the current AHA guidelines recommend an initial dose of 2 J/kg, and escalating to 4 J/kg if the first one to two shocks are unsuccessful, while the ERC does not recommend escalation beyond the initial dose of 4 J/kg

Question 32

pad size for defibrillation

Answer 32

The AHA currently recommends the largest paddle or pad size that can be placed on a child’s chest that should be used.[46] In small children, care must be taken to ensure that the pads do not overlap.

Question 33

while using paddles in the apical position should they be aligned horizontally or vertically

Answer 33

if using a paddle in the apical position, there was a lower transthoracic impedance when the paddle was positioned longitudinally rather than horizontally.

Question 34

DEFIBRILLATION GUIDELINES IN INFANTS

Answer 34

For infants, a manual defibrillator is preferred to an AED for defibrillation. If a manual defibrillator is not available, an AED equipped with a pediatric dose attenuator is preferred. If neither is available, an AED without a pediatric dose attenuator may be used.

Question 35

how does therapeutic hypothermia affect potassium

Answer 35

hypokalaemia

Question 36

Question 20 During external chest compression: a. myocardial blood flow only occurs during the relaxation phase (diastole) b. defibrillation is likely to be more successful if delivered during the relaxation phase (diastole) c. a heart that is still beating is unlikely to be harmed d. it is recommended that in pregnant women at term, hand position should be slightly higher on the sternum e. tracheal intubation should not be performed because of risk of trauma to the airway

Answer 36

a. False. Unlike the beating heart, myocardial blood flow occurs during both systole and diastole. b. True. c. True. Although some studies have suggested a greater risk of inducing VF. d. True. e. False. When possible, tracheal intubation should be performed without interruption to external chest compression. (Page 21).

Question 37

defibrillatrion considerations for aicd

Answer 37

Defibrillation pads or paddles should be placed at least 8 cm away from this device to avoid escape current damaging the device or being transmitted down the defibrillation electrode to damage the myocardium. (Page 22).

Question 38

preferred paddle position for pacing

Answer 38

The preferred paddle position is right pectoral–apical, but anterior–posterior placement is also effective. The current should be gradually increased until there is electrical and mechanical capture. (Page 148).

Question 39

current rtequired for trans cutaneous pacing

Answer 39

50 to 100 mohm

Question 40

initial cardiovascular response to hypothermia

Answer 40

Initially peripheral vasoconstriction and tachycardia is seen. (Page 150).

Question 41

what are the other cardiovascular changes seen inhypothermia

Answer 41

As the temperature falls, a progressive bradycardia occurs, due to reduced spontaneous depolarisation of the pacemaker cells. Increased systemic vascular resistance may maintain the blood pressure. Repolarisation abnormalities are also seen, and this is the cause of Osborn waves (also known as J waves), usually best observed in the lateral leads on the ECG. Progressive changes include broadening of the QRS complex, ST changes, T-wave inversion, increased PR interval, second- or third-degree heart block and prolonged QT interval. At temperatures below 24 °C there is a high risk of asystole. (Page 150).

Question 42

what is dcd ?

Answer 42

DCD should be considered for all patients who have no hope of recovery, for whom withdrawal of life-sustaining therapy is under consideration, but who do not meet the criteria for DBD. The decision to withdraw life-sustaining treatment must be entirely divorced from the consideration of DCD. (Page 194).

Question 43

what is controlled and uncontrolled DCD

Answer 43

controlled dcd : withdrawal of treatment should occur at a time when the organ-retrieval team is available. (Page 194). uncontrolled DCD Uncontrolled DCD is a term describing organ retrieval organised after the death 194 of a patient, following unsuccessful resuscitation in the community or in hospital. (Page 194).

Question 44

what is warm ischaemia time ?

Answer 44

WIT is the period of time for which organs are at body temperature with inadequate oxygen delivery, defined as systolic BP < 50 mmHg, SpO2 < 70%, or both. WITs are organ-specific, as follows: liver: 30 minutes pancreas: 30 minutes lung: 60 minutes kidneys: 2 hours ( LIP LocK ) (Page 195).

Question 45

define SIRS

Answer 45

HEART RATE > 90 respiratory rate > 20/minute or PaCO2 < 32 mmHg (4.3 kPa) temp < 36 and > 38 WBC < 4000 and > 12000 or greater than 10 % immature band form

Question 46

what are primary and secondary spontaneous pneumothorax

Answer 46

primary spontaneous pneumothorax are those which hav no underlying lung disorder vand secondary are those with underlying lung disorder Any pneumothorax in a patient over 50 with significant smoking history should be treated as an SSP. (Page 31).

Question 47

radiologically what is a large pneumothorax

Answer 47

A large pneumothorax is diagnosed by a finding of a rim of air exceeding 2 cm at the level of the hilum on a PA chest radiograph. (Page 31).

Question 48

role of suction inchesty drains

Answer 48

Chest drains should not be placed under suction in the first instance, because of the risk of re-expansion pulmonary oedema, but suction may be appropriate in patients with a persistent air leak after 48 hours or so. Such cases should be discussed with respiratory physicians or thoracic surgeons. (Page 31).

Question 49

management of primaryt spontaneous pneumothorax

Answer 49

Management of a PSP should be conservative (discharge with follow-up in respiratory clinic) if it is small and the patient is not breathless. Large PSPs should be aspirated with a 16G cannula, as should smaller PSPs in breathless patients. If the pneumothorax resolves, the patient may be discharged and followed up in clinic. If the pneumothorax fails to resolve, a chest drain should be placed and the patient admitted to hospital. Bilateral or tension pneumothoraces should always be treated with chest drains and hospital admission. (Page 31).

Question 50

management of secondary pneumothorax

Answer 50

Patients with SSP should always be admitted to hospital. If the pneumothorax is small and the patient is not breathless, aspiration with a 16G cannula may be suffi- cient treatment, but the patient should be admitted for 24 hours of oxygen therapy and observation. Larger or non-resolving pneumothoraces should be treated with a chest drain and admission, as should breathless patients with small SSPs. (Page 31). (Page 31).

Question 51

what are the contraundications of a chest drain

Answer 51

1. any coagulopathy should be corrected prior to chest drain insertion.however routine coagulation screening is not warranred. 2. Lung densely adherent to the chest wall throughout the hemithorax is an absolute contraindication to chest drain insertion. (Page 1).

Question 52

how to decide the site of insertio n

Answer 52

A chest tube should not be inserted without further image guidance if free air or fluid cannot be aspirated with a needle at the time of anaesthesia. [C] • Imaging should be used to select the appropriate site for chest tube placement. (Page 3).

Question 53

what is the triangle of safety

Answer 53

the triangle oif safety is bound below by the fifth ics and anteriorly by the anterior axdillary fold andd posteriorly by the anterior borfer of lattisim us dorsi

Question 54

which should be preferred large or small bore tubes

Answer 54

small bore tubes should be preferred as they are more comfortable to the partient large botre tubrs are preferred in case of ghaemothoraces.

Question 55

type of xray film reqwuired for diagnosis of pneumothorax

Answer 55

traditionally standing expoiratopry films have been recommended but recent guidelines state that they predovide no additional information

Question 56

should chest dsrains be clamped during transfer

Answer 56

A bubbling chest drain should never be clamped, but post-pneumonectomy patients or cases of large pleural effusions may need intermittent clamping to prevent mediastinal shifts and re-expansion pulmonary oedema, (Page 202).