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Anesthesiology > CVP tracing > Flashcards

CVP tracing Flashcards

1
Q

What does the a wave mean?

A

Right atrial contraction

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2
Q

What does the c wave mean?

A

Bulging of the tricuspid valve

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3
Q

What does the x descent mean?

A

Atrial relaxation

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4
Q

What does v wave rise mean?

A

Rise in atrial pressure before tricuspid valve opens

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5
Q

What does y descent mean?

A

Right atrial emptying into right ventricles

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6
Q

What does CVP provide?

A

Info about preload, can be a marker of LV preload if there is no cardiopulm. disease

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7
Q

What can a PA catheter measure?

A

CO, SvO2, PA and Right atrial pressure

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8
Q

What can be calculated from a PA Cather?

A

SVR, PVR, SV

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9
Q

What is used as an estimate of LV EDP?

A

PAOP (pulmonary artery occlusive pressure)

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10
Q

What are the indications for a PA catheter?

A

MI, valvular disease, massive trauma, major vascular surgery, ARDS, LVF

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11
Q

How does an echo work?

A

Uses a piezoelectric crystal to emit US waves that penetrate tissue and then bounce back to the crystal to give info about velocity, distance, and density.

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12
Q

What are the category 1 indications for echocardiography?

A

Valvular disease, congenital heart surgery, HOCM, TAA/AAA, pericardial window procedures, unstable patients, thromboembolic disease

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13
Q

What are the signs of light anesthesia?

A

SNS responses: high HR, grimace, sweating, tearing, high BP

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14
Q

What is the bispectral index?

A

Selected EEG waves that are reduced to a number

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15
Q

What do somatosensory evoked potentials monitor?

A

The integrity of the dorsal columns of the spinal cord

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16
Q

How do you perform SSEPs?

A

Put electrodes by median or ulnar nerves of the arms and posterior tibial nerves of the legs

17
Q

What do motor evoked potentials monitor?

A

Corticospinal tracts

18
Q

How do you perform MEPs?

A

Put electrode on scalp and the recording electrode on the contracting muscle.

19
Q

What are the standards for basic anesthetic monitoring?

A
  1. The anesthesiologist shall be present in the room the whole time
  2. The patients oxygenation, ventilation, circulation, and temperature are continually evaluated
20
Q

How do you monitor the patient’s oxygenation?

A

Pulse oximeter

21
Q

How does a pulse ox work?

A

Illuminates tissue with 2 wavelengths of light, the plethysmography is used to differentiate the pulsatile arterial waveform from background tissue. Oxygen diffuses through a polymeric membrane and reacts with water to form hydroxide which produces a current change proportional to the amount of oxygen molecules present.

22
Q

What 2 things dose a pulse ox rely on?

A

Color of the arterial flow and pulsatile flow

23
Q

How do you monitor ventilation?

A

ETCO2

24
Q

How do you monitor circulation?

A

Pulse, BP, ECG

Anesthesiology (19 decks)

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