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