Page 446 - Handbook of Biomechatronics

440 Graham Brooker

Fig. 19 Cross section of an implantable infusion pump. Reprinted with permission from
the Journal of the American College of Surgeons, formerly Surgery Gynecology & Obstetrics.

Fig. 20 Schematic representation of the operation of the implantable infusion pump.
(Reprinted with permission from the Journal of the American College of Surgeons, formerly
Surgery Gynecology & Obstetrics.)

However, IV insulin delivery was associated with a high incidence of catheter
obstructions and thus the intraperitoneal (IP) option was promoted as a better
option.
A completely different design for an implantable pump using a peristaltic
pump driven by rotary solenoid motor was developed in 1980 in a cooper-
ative effort between the researchers at the University of New Mexico
(UNM) and Sandia Laboratories (Spencer et al., 1980).
Details of the UNM/Sandia pump design are shown in Fig. 21.
The pump was not limited to a single basal flow rate and could be
programmed following implantation to deliver any of 15 different basal