A 44-year-old woman receiving home hyperalimetation with an implanted
port catheter, was scheduled to undergo resection of
ovarian cyst and adhesiotomy. For the induction of
anesthesia,
fentanyl 0.05 mg,
thiopental sodium 200 mg, saline 5 ml and
vecuronium 10 mg were given through the
port catheter. Although she fell asleep, she kept breathing spontaneouly. It was not possible to give any further drugs through this
port catheter, suggesting obstruction of the
catheter. The endotracheal intubation was assisted with
sevoflurane 5% and
suxamethonium 80 mg
chloride given through the peripheral vein. Five ml of saline used to flash out
thiopental sodium before the administration of
vecuronium blomide was not considered to be adequate. An experiment was conducted to investigate how much saline is necessary to wash out completely the
drug given previously. The results suggest that more than 10 ml of saline should be given through the
port catheter. Various types of
central venous catheters are being used. Precise knowledge of each
catheter is necessary to use this indispensable central vein route, especially at the crucial timing, such as the induction of
anesthesia.