Page 634 - Clinical Application of Mechanical Ventilation

600 Chapter 18

TABLE 18-8 Use of Noninvasive Cardiopulmonary Monitoring Devices in a Hyperbaric Chamber

Noninvasive Cardiopulmonary
Monitoring Device Special Consideration

ECG ECG signals are transferred outside the
hyperbaric chamber for monitoring

Pulse oximetry Use is limited to pulse rate only because HBO usually
results in full oxygen saturation for patients without
cardiovascular deficits

Blood pressure Manual method is preferred as automated (electrical)
method may pose fire hazards

Temperature Electrical thermistors should be safe
Mercury-based device should not be used due to
toxicity of mercury under pressure

TcPO and TcPCO Suitable for use in hyperbaric chamber to monitor
2
2
oxygenation and ventilation
P CO 2 Mainstream device may provide false high results due to
ET
increase in gas density
Sidestream device is preferred to monitor end-tidal PCO
2
outside the hyperbaric chamber using decompressed
expiratory tubing
Spirometry and airway pressure Electric spirometer (e.g., Ohmeda 5420) may be used to
monitor airway pressure and exhaled tidal volume
Mechanical respirometer (e.g., Wright) can be used to
monitor exhaled tidal volume

Reference: Kot, 2005.
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Figure 18-4 Monoplace hyperbaric chamber.

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