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13
Device Implantation
Site Selection
The PhysioTel®Digital device can be implanted
either
intramuscularly, subcutaneously,
intraperitoneally or subperitoneally in animals
weighing
at least 2.5 kilograms. Possible
locations for placement of the device body vary with the species and size of animal that is
implanted and the physiologic parameters that will be measured.
If core body temperature measurements are desired, the device must be placed in the
peritoneal cavity or subperitoneally (between the peritoneum and the abdominal muscle).
Direct placement of the device body in the abdomen of swine is not recommended due to
rare cases of engulfment and ingestion of the device by the swin
e’s gastrointestinal tract
,.
Tt
herefore subperitoneal placement is recommended
in this species
.
Other possible locations for placement of the device body include intramuscularly along the
animal’s flank or subcutaneously along the dorsum or the flank. Subcutaneous placement
is not generally recommended in pigs and NHPs since they are prone to picking and
rubbing the device when it is placed in this location.
For subcutaneous and intramuscular locations, the animal must be large enough to allow
the antennae to lie perpendicular to the device body to preserve signal quality and in
location that is not directly over bone since this can lead to skin necrosis and irritation. The
device must lie flat under the skin in a pocket
that
is large enough to accommodate the
device comfortably. However excessive pocket size predisposes to seroma formation.
Device Body
Location
Dog
NHPs
Swine
Peritoneal cavity;
sutured to the inner
abdominal wall
Acceptable location Acceptable location
(NHP must be > 2.5
kg)
Not recommended
Peritoneal cavity;
sutured between
the peritoneum and
the abdominal wall
muscles
Acceptable location Acceptable location
(NHP must be > 2.5
kg)
Acceptable location
Intramuscularly
along the animal
’
s
flank
Acceptable location Acceptable location Acceptable location
Subcutaneously
along the dorsum or
flank
Acceptable location
Not recommended
Not recommended
