2015.1 Flashcards
Young man has removed his buprenorphine patch on the morning of surgery. What time till PLASMA reaches half original level
A. 12 hours
B. 18 hours
C. 24 hours
D. 30 hours
E. 36 hours
D. 30 hours
A 58yo with solitary hepatic metastasis from coloncancer scheduled for resection of R lobe of liver. Inorder to manage the risk of intra-operative haemorrhage, it is most important to maintain:
A. High CVP in anticipation of heavy blood loss
B. Decreased MAP to reduce arterial bleeding
C. Decreased CVP to reduce venous bleeding
D. Normal MAP in anticipation of heavy blood loss
E. Normal CVP to ensure adequate filling of the heart.
C. Decreased CVP to reduce venous bleeding
An 80yo man is having a transuretheral bladder resection, the surgeon is using diathermy close to the lateral bladder wall which results in patient thigh adduction. The nerve involved is:
A. Inferior gluteal
B. Obturator
C. Pudendal
D. Scaitic
E. Superior gluteal
B. Obturator
In Conn’s syndrome, the usual derangement is:
A. Hypoglycaemia, hypokalaemia and hypernatraemia
B. Hypoglycaemia, hyperkalaemia and hyponatraemia
C. Normoglycaemia, hypokalaemia and hypernatraemia
D. Normoglycaemia, hyperkalaemia and hyponatraemia
E. Hyperglycaemia, hyperkalaemia and hyponatraemia
C. Normoglycaemia, hypokalaemia and hypernatraemia
A 60 year old woman is admitted to hospital with subarachnoid haemorrhage. Her GCS is 11, and her blood pressure is 175/110mmHg. She is administered oral nimodipine. The main reason for this treatment is:
A. Control her blood pressure
B. Manage acute hydrocephalus
C. Prevent delayed cerebral ischaemia
D. Reduce the risk of rebleeding
E. Treat angiographically-proven cerebral vasospasm
C. Prevent delayed cerebral ischaemia
You are the anaesthetist at a Caesarean Section for a 36/40 gestation pregnancy. The baby at birth is floppy and apnoeic. You decide that positive pressure ventilation via mask is necessary. The recommended FiO2is:
A. 0.21
B. 0.4
C. 0.6
D. 0.8
E. 1.0
A. 0.21
You are inducing a 20-year-old female who has an IV cannula in her antecubital fossa which was inserted in the emergency department. She complains of pain after 10mL of propofol and it becomes clear that cannula is intra-arterial. The best management option is:
A. Intra-arterial injection of 5mL 1% lignocaine
B. Intra-arterial injection of 30mL Normal Saline
C. Intra-arterial injection of 50mg paperverine
D. Intra-arterial injection of 500u heparin
E. Observation
E. Observation
When is it necessary to use glycine as irrigation fluid for TURP?
A: For monopolar diathermy
B: For bipolar diathermy
C: For Nd:Yag laser
D: Greenlight laser
A. For monopolar diathermy
A 69 yo man is brought into ED by ambulance with a compound fracture of his forearm from an unwitnessed fall. Has a history of schizophrenia and depression with uncertain medication compliance. He is confused and agitated with generalised rigidity but no hyperreflexia. Obs - HR 120, BP 160/90, RR 18, Sats 98 Temp 38.8. Likely Dx?
A. Heat stress from anticholinergic therapy
B. Hypoxic ischaemic encephalopathy
C. Neuroleptic malignant syndrome
D. Serotonin syndrome
E. Pain from the compound fracture
C. Neuroleptic malignant syndrome
With surgical bleeding, the first clotting factor to reach a critical level is
A. I
B. II
C. VII
D. X
E. XIII
A. I (fibrinogen)
Anaesthetic and respirable gas supplies to wall outlets in the operating theatre is at pressures of
A. 200kPa
B. 400kPa
C. 500kPa
D. 750kPa
E. 1200kPa
B. 400 kPa
The most useful sign to distinguish between severe serotonin syndrome and malignant hyperthermia is
A. Clonus
B. Hyperthermia
C. Metabolic acidosis
D. Muscle rigidity
E. Wheeze
C. Metabolic acidosis
Patient having a laparotomy. On prednisolone for 6/12, 10mg/day. What is the equivalent dose of dexamethasone?
A) 2mg
B) 4mg
C) 6mg
D) 8mg
E) 10mg
A. 2 mg
Axillary arm block U/S presented. Nerves marked with numbers 1-4 but not otherwise identified.
Patient having an operation of a lacerated index finger under regional anaesthesia. Which combination will provide adequate cover?
A) 1 and 2 (radial and median)
B) 1 and 3 (radial and ulnar)
C) 2 and 3 (median and ulnar)
D) 2 and 4 (median and musculocutaneous)
E) 3 and 4 (ulnar and musculocutaneous)
A. Radial and median
Child 20kg having a caudal. Has a VF arrest post, non-responsive to usual treatments. What dose of intralipid 20% would you give?
A) 10mL
B) 20mL
C) 30mL
D) 40mL
E) 50mL
C. 30 mL (1.5 mL/kg)
Labour epidural placed. Headache postpartum. Which ofthe following is inconsistent with post partum dural puncture headache.
(a) Headache located frontal only
(b) Presents > 24 hrs post partum
(c) presents immediately post partum
(d) associated with auditory symptoms
(e) associated with neck stiffness
C. Presents immediately postpartum
Eclamptic patient. Given Magnesium intravenously. Which of these symptoms is often associated with magnesium administration?
(a) Bradyarrhythmia
(b) Cardiac arrest
(c) Hypotension
(d) Depressed respiratory effort
C. Hypotension
The clinical sign that a lay person should use to decide whether to start CPR is:
(a) absence of breathing
(b) loss of central pulse
(c) loss of peripheral pulse
(d) loss of consciousness
(e) obvious airway obstruction
A. Absence of breathing
What is the maintenance fluid rate for a 15kg child?
a) 50ml/hr
A. 50 mL/h ( [4 x 10] + [2 x 5])
Patient’s K+ is 7.0 what is the best initial management?
a) give Ca
b) give insulin/ dextrose
A. Give calcium to stabilise the myocardium
Which patients require antibiotic prophylaxis?
a) Previous Mitral valve ring annuloplasty
b) Previous patch repair of vsd
Probably A best answer.
Antibiotic prophylaxis is still recommended (in certain situations) in high-risk patients, such as:
- Prosthetic cardiac valve (or valve repaired with prosthetic material)
- Previous IE
- Congenital heart defect, but only if it involves:
o Unrepaired cyanotic defects (including palliative shunts and conduits)
o Completely repaired defects with prosthetic material or devices during the first 6/12 after the procedure (after which the prosthetic material is likely to have been endothelialised)
o Repaired defects w/ residual defects at or adjacent to the site of a prosthetic patch or device (which inhibit endothelialisation)
- RHD in high risk groups (Aboriginal, or non-Indigenous from low socioeconomic background)
- (Consider for post-cardiac transplant pts)
A 63 yo lady has a difficult thyroidectomy for cancer. Immediately post extubation she develops stridor and respiratory distress. The most likely cause is
A) Hypocalcaemia
B) recurrent laryngeal nerve palsies
c) tracheomalacia
d) Neck oedema and haematoma
e) Vocal cord oedema
Tracheomalacia best answer? (given the stridor occurs immediately after extubation)
Tracheomalacia is rare but is more common with malignant processes
Most common cause of delayed stridor would be neck oedema/haematoma
A 23 yo has a traumatic brain injury. Which fluid isrelatively contraindicated?
a) Albumin
b) Normal saline
c) CSL
d) Colloid
e) Something else
A. Albumin (SAFE study)
CSL also relatively contraindicated due to low sodium content.
50 something yr old smoker presents for laparotomy. RFTs given, what is the cause? FEV1, FVC both reduced, FEV1/FVC 98%. TLC, RV, DLCO 8 (pred = 30)
(a) PE
(b) Obesity
(c) Bilateral phrenic nerve palsies
(d) Pulmonary fibrosis
(e) COPD
D. Pulmonary fibrosis
Traumatic brain injury patient. Cerebral angiogram shows Cerebral perfusion = 15mL/100g/min, cerebral oxygen consumption 3.5mL/100g/min. This is consistent with:
(a) Cerebral hyperperfusion
(b) Reperfusion injury
(c) Cerebral ischaemia
(d) Appropriate autoregulation
(e) Cereberal vasoconstriction
E. Cerebral vasoconstriction (Ganong: normal CBF 54 mL/100 g/min, normal CMRO2 3.3 mL/100g/min).
There is not enough information in the stem to infer ischaemia (need to know DO2, not just CBF), although this situation probably represents brain ischaemia (assuming Hb concentration of 15 g/dL and PaO2 100 –> O2 content = 20.4 mL/100 mL = 3.06 mL/15 mL)
Absolute contraindication to ECT:
A. Cochlear implants
B. Epilepsy
C. Pregnancy
D. Raised intracranial pressure
E. Recent myocardial infarction
E. Recent myocardial infarction (and phaechromocytoma - only absolute, raised ICP - relative)
FFP is given to a patient to treathypofibrinogenaemia. The volume required to raise the fibrinogen by 1g/L is
A 1mL/kg
B 5mL/kg
C 10mL/kg
D 20mL/kg
E 30mL/kg
E. 30 mL/kg
The diluted thrombin time measures the anticoagulant activity of
A apixaban
B rivaroxaban
C dabigatran
D warfarin
E heparin
C. Dabigatran
In a trauma patient the main mechanism by which hypothermia exacerbates bleeding is by
A altered blood viscosity
B causing DIC
C inhibition of clotting factors
D potentiation of anticoagulant effect of drugs used to treat DVT
E decreases platelet number and function
C. Inhibition of clotting factors
A patient having a liver resection suffers a haemodynamically significant venous air embolism. During resuscitation how do you best position the patient?
A head up, right side down
B head up, left side down
C head up, no lateral tilt
D head down, right side down
E head down, left side down
E. Head down, left side down
to relieve RVOT obstruction
In a normal adult what amount of IV potassium chlorideis needed to raise the serum potassium from 2.8 to 3.8mmol/L?
A 10mmol/L
B 20mmol/L
C 50mmol/L
D 100mmol/L
E 200mmol/L
??? these answers are concentrations, not amounts
In a haemodynamically stable 20 year old man with blunt chest trauma, the best screening test to diagnose cardiac injury requiring treatment is:
A CXR
B serum CK-MB
C serum troponin
D 12 lead ECG
E Transthoracic Echocardiogram
D. 12-lead ECG
With regards to medical ethics, the concept of fidelity involves:
A equitable distribution of resources
B following a professional code of conduct
C promoting well being
D wise use of resources
E witholding of futile treatments
B. Following a professional code of conduct
What is the correct position for the tip of a PICC in a child
a) Carina
b) Below right tracheobronchial angle
c) Above right heart border
d) Sternoclavicular junction
B. Below right tracheobronchial angle
RCH website:
The most reliable anatomical landmark for the lower SVC in children is one vertebral body below the carina (consensus from RCH Interventional Radiology Department and available paediatric literature)
Less reliable landmarks of lower SVC include where the right superior cardiac shadow meets the mediastinal edge (the drawback is that this is obscured by the thymus in young children) and the T6 thoracic vertebrae (count down from the T1 Vertebrae which is joined by first rib)
Image of a lateral C-spine Xray. Asked what the diagnosis was.
Seemed to have anterior atlantodental interval >9mm.
a) Atlantoaxial instability
b) Retropharyngeal haematoma (?or abscess)
c) Tear drop fracture
d) Epiglottitis
e) unilateral facet joint dislocation
A. Atlantoaxial instability
According to the ANZCA endorsed guidelines, what is the correct colour for the label for a subcutaneous ketamine infusion
a) Pink
b) Red
c) Beige
d) Blue
e) Yellow
C. Beige
Prior to nasal intubation you spray Lignocaine/Phenylephrine preparation (CoPhenylcaine) into the nose. Some lands in the eye. What happens?
a) Ecchymosis
b) Myosis
c) Midriasis
d) Proptosis
e) Nystagmus
C. Midriasis
You trial a new drug to prevent PONV. It is 50% more effective than the current drug. Four percent of people still experience PONV with the new drug. How many people need to receive the new drug in place of the current drug to have one person less suffering from PONV?
a) 2
b) 8
c) 15
d) 25
e) 33
D. 25 (NNT = 1/ARR)
What does a white cylinder with a Grey coloured shoulders/neck contain?
a) Medical air
b) Carbon Dioxide
c) Helium
d) Oxygen
e) Argon
B. CO2
The best solution to ensure asepsis prior to neuraxial anaesthesia is
A. 0.5% Chlorhexidine
B. 0.5% Chlorhexidine with 70% alcohol
C. 5% Povidine Iodine
D. 5% Povidine Iodine with 70% alcohol
E. 10% Povidine Iodine
B. 0.5% chlorhexidine with 70% alcohol
You are anaesthetising a 25 year male for an open appendicectomy. He has a Fontans circulation on a background of tricuspid atresia. The best strategy to manage his ventilation intraoperatively would be:
A. Ensure adequate PEEP
B. Decrease Inspiratory time
C. Shorten I:E Ratio from 1:3 to 1:1.2
D. Increase Inspiratory time but with reduced inspiratory pressures
E. Ensure adequate spontaneous ventilation
B. Decrease inspiratory time (to minimise RV afterload)
CEACCP 2008:
- For relatively short procedures, Fontan patients are probably better off breathing spontaneously, as long as severe hypercarbia is avoided.
- For major surgery, or when prolonged anaesthesia is required, control of ventilation and active prevention of atelectasis is usually advisable.
- Potential disadvantages of mechanical ventilation in Fontan patients relate to the inevitable increase in mean intrathoracic pressure. This causes decreased venous return, decreased pulmonary blood flow, and hence, decreased cardiac output.
- Low respiratory rates, short inspiratory times, low PEEP, and tidal volumes of 5-6 mL/kg usually allow adequate pulmonary blood flow, normocarbia, and a low PVR.
- Hyperventilation tends to impair pulmonary blood flow, despite the induced respiratory alkalosis, because of the increased mean intrathoracic pressure.
You are anaesthetising a 70 year old woman for CABG with a pulmonary artery catheter in situ. After separation from bypass you notice frank, copious blood rising in the endotracheal tube. Your immediate action should be to:
A. Check ACT
B. Insert a double lumen tube
C. Reinstate bypass
D. Administer protamine
E. Pull back the pulmonary arterycatheter several centimetres
B. Insert a DLT
Miller:
- Position pt with bleeding lung dependent
- Perform endotracheal intubation, oxygenation, airway toilet
- Isolate lung by endobronchial DLT or SLT or bronchial blocker
- Withdraw PAC several centimetres, leaving it in the main PA. Do not inflate the balloon (except with fluoroscopic guidance)
- Position pt with isolated bleeding lung nondependent. Administer PEEP to the bleeding lung if possible
- Transport the patient to medical imaging for diagnosis and embolisation if feasible
Penetrating injury to chest. What part of the heart most likely injured?
A. RV
B. LV
C. RCA
D. LA
E. RA
A. RV
General anaesthesia is preferred for endoluminal AAA stenting because:
A. Ischaemic renal pain
B. Prolonged periods of apnoea required
C. Painful aorta
D. Major risk of haemorrhage
E. Trash foot pain
D. Major risk of haemorrhage
Which volatile agent has got minimum effect on ICP at 1 MAC
a) isoflurane
b) sevoflurane
c) desflurane
d) enflurane
e) halothane
Iso, sevo and des have minimal effect
You are inserting a right internal jugular vein CVC. Why is it important to avoid turning the patient’s head extremely to the left?
a) Uncomfortable for the patient
b) Increases risk of internal carotid artery puncture
c) Compresses internal jugular vein and makes it more difficult to puncture
d) Distorts the anatomy, making the vein more difficult to correctly identify
e) Increases risk of external jugular vein puncture
D. Distorts anatomy, making vein more difficult to correctly identify.
Anaesthesia UK - TOTW: Central venous cannulation (2009)
The patient is supine, arms by their sides with a head down tilt to distend the veins and reduce the risk of air embolism. The head should be slightly turned away from the side of cannulation for better access (excessive turning should be avoided as it changes the relationship of the vein and artery and can collapse the vein). The patients neck can be extended by removing the pillow and putting a small towel under the shoulders.
Patient two hours after bilateral crush injuries to lower limbs. What would you expect to see?
a) Hypocalcaemia
b) Hypokalaemia
c) Hypophosphataemia
d) Hypouricaemia
e) Metabolic alkalosis
A. Hypocalcaemia
Wiki - crush syndrome:
‘…These systemic effects are caused by a traumatic rhabdomyolysis. As muscle cells die, they absorb sodium, water and calcium; the rhabdomyolysis releases potassium, myoglobin, phosphate, thromboplastin, creatine and creatine kinase…
…The clinician must protect the patient against hypotension, renal failure, acidosis, hyperkalemia and hypocalcemia.’j
ACEP - crush injury and crush syndrome:
‘Crush syndrome can cause local tissue injury, organ dysfunction, and metabolic abnormalities, including acidosis, hyperkalemia, and hypocalcemia.’
Delivery of neonate. Meconium liqour. Baby floppy, blue, apnoeic, pulse rate 90bpm. What is the next step in managment?
a) Commence PPV
b) Suction the trachea
c) Commence CPR
d) Dry and stimulate
B. Suction trachea (intubate trachea immediately and suction down ETT, then remove ETT; only do this once and only if neonate is apnoeic - if it’s making spontaneous respiratory efforts, better to assist ventilation with PPV).
You inject 10ml ropivicaine into a T5 paravertebral block. Patient becomes bradycardic, hypotensive and apnoeic. What is the cause.
A. Contralateral spread
B. Intrathecal spread
C. Inadvertent intravascular injection
D. Local anaesthetic toxicity
B. Intrathecal spread
Medical therapy vs TAVI in inoperable patients. At 30 days, decreased risk of:
A
B Myocardial infact
C Death
D Stroke
E Atrial fibrillation
D. Decreased risk of stroke with medical therapy
TAVI (vs medical therapy):
Death – reduced but not statistically significant (not at 30 days)
Stroke – TAVI increased risk, also increased risk vascular complications
Atrial fibrillation – reduced but not statistically significant
Glycine used during urology case. Osm is:
A.
B. 200
C. 250
D. 300
B. 200 (220 mosmol/kg: CEACCP Anaesthesia for TURP)
Volatile analysis in most anaesthetic machines is done via which method?
A Gas chromatography
B Infrared analyser
C Raman spectometry
B. Infrared analyser