14
Important Information — Please Read Before Use
HIGH FLOW INSUFFLATION UNIT UHI-4
• To avoid complications, monitor patient parameters such as
endotidal CO
2
, electrocardiogram, body temperature, etc.
while using the UHI-4.
• Metabolic Acidosis and resultant cardiac irregularity.
Prolonged cavity pressures greater than 20 mmHg should be
avoided. This can cause any of the following:
Decreased respiration with compromised
diaphragmatic excursion
Decreased venous return
Decreased cardiac output
Acidosis
• Excessive flow rates and/or pressures may result in an
excessive absorption of CO
2
and/or gas embolism. The
cavity can be adequately distended using a maximum
pressure of 20 mmHg. It is seldom necessary to use a cavity
pressure greater than 20 mmHg. Little intravasation should
occur at these levels. Pressures over 20 mmHg are rarely
necessary and will increase the amount and the rapidity of
intravasation of gas. Adequate respiration helps avoid
problems related to CO
2
.
– Reference
1) Norman J, Atkinson SA: The effect of cardiac
sympathetic blockade on the relationship between
cardiac output and carbon dioxide tension in the
anesthetized dog. Br J Anaesth 42: 592 – 602, 1970
2) Scott, D. B. and Julian, D. G.: Observations on
cardiac arrhythmias during laparoscopy.
Br. Med. J.,1: 411 – 413, 1972.
3) Smith, I., Benzie, R. J., Gordon, N. L. M., et al.:
Cardiovascular effects of peritoneal insufflation of
carbon dioxide for laparoscopy. Br. Med. J., 3: 410 –
411, 1971.
4) Lenz, R. J., Thomas, T. A. and Wilkins, D. G.:
Cardiovascular changes during laparoscopy: Studies
of stroke volume and cardiac output using impedance
cardiography. Anaesthesia, 31: 4 – 12, 1976.
5) Ishizaki, Y., Bandai, Y., Shimomura, K., et al.: Safe
intra-abdominal pressure of carbon dioxide
pneumoperitoneum during laparoscopic surgery.
Surgery, 114: 549 – 554, 1993.
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