Misc Page

Misc Page

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The <Misc> page of the supervisory application is used to make adjustments to various 'Miscellaneous' parameters of the patient.

 

SupervisorMisc

 

The values set on this page are all nominal - ie they represent the value of the parameter before any intervention or therapy has occurred.

 

The <BIS> slider is used to set the nominal BIS score of the patient. A fully-conscious person has a score of 98 - 100 (Glass et al).

 

According to Glass et al, typical values for BIS are:

 

BIS range

Hypnotic State



70 - 100

Awake / Light to moderate sedation

60 - 70

Light hypnotic state. Low probability of recall

40 - 60

Moderate hypnotic state. Unconscious

0 -40

Deep hypnotic state

 

The <BMR> slider is used to set the nominal Basal Metabolic Rate (VO2 at 37C) for the patient.  A typical value for an anaesthetised, 70 kg patient undergoing cardiac surgery is in the range 180 - 220 ml/Min (Kirklin and Barratt-Boyes ).

 

The <CO2 SP> slider is used to set the carbon dioxide set-point for the patient. A typical value for an awake patient is 38 - 42 mm Hg. Adjusting it to a higher value will depress the patient's spontaneous respiration, whereas lowering it will increase respiratory drive.

 

The <Temp> slider is used to set the starting temperature of the patient. The temperature should not be changed markedly over a short time period as it will produce unexpected blood gas results until re-equilibration of the respiratory gases has had time to occur in all body pools.

 

The <K SP> slider is used to set the potassium set-point for the patient. A typical value for a patient with normal renal function is 4.0 - 5.0.

 

The <Hct> slider is used to set the starting haematocrit for the patient. The typical value for a  normal male is ~ 45. The haematocrit should not be changed markedly over a short time period as it will produce unexpected blood gas results until re-equilibration of the respiratory gases has had time to occur in all body pools.

 

The <HCO3> slider is used to set the bicarbonate set-point for the patient.