27 questions match your search.


In a 5-kg child, the end-tidal carbon dioxide tension is 35 mmHg during spontaneous ventilation through a Mapleson D system. Which single change is most likely to increase this value?

ADVANCED Equipment & Physics Pediatric

An arterial blood sample is obtained from a patient undergoing hypothermic cardiopulmonary bypass at 28 C. Analysis at 37 C shows a pH of 7.40 and PaCO2 of 40 mmHg. Which of the following values are most likely if the analysis is corrected to 28 C?

ADVANCED Equipment & Physics Cardiac

A 32-year-old woman is anesthetized for suboccipital craniotomy. During positioning, the capnograph shows an abrupt decrease in the slope of the expiratory upstroke. Which of the following is the most likely cause?

ADVANCED Equipment & Physics Neuro

A healthy 57-year-old man with a ureteral calculus is scheduled for immersion extracorporeal shock wave lithotripsy. Which of the following statements is true?

ADVANCED Equipment & Physics General

During laser excision of vocal cord polyps in a 5-year-old boy, dark smoke suddenly appears in the surgical field. The trachea is intubated and anesthesia is being maintained with halothane, nitrous oxide, and oxygen. The most appropriate initial step is to

ADVANCED Equipment & Physics General Pediatric

A 5-year-old boy is to undergo microlaryngeal carbon dioxide laser vaporization of laryngotracheal papillomas under halothane administered through a small polyvinylchloride (PVC) endotracheal tube. The diluent gas mixture LEAST likely to support laser combustion of the PVC tube is

ADVANCED Equipment & Physics Pediatric

The most sensitive means of detecting venous air embolism is

ADVANCED Equipment & Physics Neuro

After the bronchial and tracheal cuffs of a right endobronchial tube are inflated, ventilation through the tracheal lumen is not possible. This finding is most consistent with

ADVANCED Equipment & Physics Respiratory & Critical Care

A 46-year-old patient who abuses intravenous drugs develops acute aortic valvular insufficiency from bacterial endocarditis. Which of the following statements concerning pressures measured through a pulmonary artery catheter is true?

ADVANCED Equipment & Physics Cardiac

Pulmonary artery occlusion pressure

ADVANCED Equipment & Physics General Cardiac

Which of the following detects the smallest volume of venous air embolization?

ADVANCED Equipment & Physics Neuro

A 75-year-old man with a left bundle branch block is undergoing placement of a pulmonary artery catheter through the right internal jugular vein. He becomes pale and his heart rate decreases to 40 bpm when the catheter tip enters the right ventricle. The most likely cause is

ADVANCED Equipment & Physics Cardiac

Reduction of fire hazards during laser surgery of the airway is best accomplished by use of

ADVANCED Equipment & Physics General

The principal rationale for the use of warmed humidified inspired anesthetic gases in children is to

ADVANCED Equipment & Physics Pediatric

During induction of general anesthesia in a patient with a supraglottic tumor, both intubation and subsequent ventilation via a face mask are impossible. A cricothyroidotomy is performed with a 16-gauge intravenous catheter. Which of the following statements is true?

ADVANCED Equipment & Physics Respiratory & Critical Care General

A pulmonary artery catheter is placed in an awake patient breathing room air. Typical right ventricular and pulmonary artery pressure tracings are obtained. With the catheter balloon inflated, blood drawn from the distal port has a PaO2 of 100 mmHg, while a simultaneous radial artery sample has a PaO2 of 90 mmHg. These data indicate that the

ADVANCED Equipment & Physics Respiratory & Critical Care

A multi-orifices right heart catheter is being positioned by EKG control prior to sitting craniotomy. The EKG tracing is obtained between the distal tip of the catheter and the right arm lead. The most appropriate next step is to

ADVANCED Equipment & Physics Neuro

A child undergoing general anesthesia is breathing spontaneously using the Jackson-Rees modification of the Ayres T-piece. Respiratory rate is 20/min and tidal volume is 75 ml. What is the minimum fresh gas flow required to prevent rebreathing?

ADVANCED Equipment & Physics Pediatric

The jet ventilation technique using an injector during laryngobronchoscopy relies on

ADVANCED Equipment & Physics

During laser excision of a vocal cord polyp, the tracheal tube ignites. Which of the following is the most appropriate next step?

ADVANCED Equipment & Physics General

A neurologically intact 48-year-old woman is scheduled for removal of a parietal lobe arteriovenous malformation. The relative risk for complete resection is to be determined by a test occlusion of the feeding artery. Which of the following intraoperative monitoring techniques is most appropriate for this test?

ADVANCED Equipment & Physics Neuro

Intraoperatively, the occurrence of prominent "a" waves on the central venous pressure waveform can be explained by each of the following EXCEPT

ADVANCED Equipment & Physics Cardiac

The risk for airway fire during laser resection of a tracheal tumor is decreased by use of

ADVANCED Equipment & Physics

A 2-year-old child has cardiac arrest during an inguinal herniorrhaphy under general anesthesia administered during a Jackson-Rees system. The graph shows end-tidal PCO2 monitored from the tip of the endotracheal tube during cardiopulmonary resuscitation; minute ventilation is unchanged. Which of the following is the most likely cause of the change beginning at the arrow?

ADVANCED Equipment & Physics Pediatric

Cardiac output measured by thermodilution with a pulmonary artery catheter most accurately reflects systemic blood flow in a patient with

ADVANCED Equipment & Physics Cardiac

Pulmonary artery diastolic pressure is an unreliable indicator of left ventricular end-diastolic pressure in patients with

ADVANCED Equipment & Physics Cardiac

An otherwise healthy 16-year-old girl is undergoing posterior spinal fusion for thoracolumbar scoliosis. During the procedure, the most likely cause of a marked decrease in the amplitude of the somatosensory evoked potentials after stimulation of the posterior tibial nerve is

ADVANCED Equipment & Physics Pediatric Neuro