Urodynamic Catheters & Transducers Solar Blue User Manual
47
Figure 3.4
Example reusable solid-state catheter
The procedure to prepare the catheters is as follows:
▪
Premoisten the catheter in distilled sterile water as described in manual of
the manufacturer (the minimum period is two minutes).
▪
Connect the premoistened catheter to the Solar Blue module as follows:
o
Connect P
ves
(vesical/bladder pressure) to P1
o
Connect P
abd
(abdominal pressure) to P2
o
Connect P
ura
(urethral pressure) to P3
▪
Press the
Zero
all
button to zero all pressures to atmospheric pressure.
▪
Disinfect the genital area.
▪
Insert the bladder catheter and position the vesical pressure sensor (P
ves
) in
the bladder. If applicable, position the urethral pressure sensor (P
ura
) at the
maximum urethral pressure and fix the catheter.
▪
Insert the rectal catheter into the rectum and fix the catheter.
▪
Ask the patient to cough to check the registration of all pressures. The
spikes of P
ves,
P
abd
and P
ura
should rise equally in response to the cough,
and the detrusor pressure (P
det
) should remain relatively flat.
▪
Start the investigation (cystometry, pressure-flow study, UPP, or
gynecology study, see chapters 5 to 8).
3.4
Air-charged Catheters
Air-charged catheters (Figure 3.5) can be used to perform pressure
measurements in the bladder, urethra, and rectum. The bladder catheter has
one or two pressure sensors with one filling lumen. One sensor is for
measuring pressures in the bladder (P
ves
), the second sensor is for measuring
pressures in the urethra (P
ura
). The rectal catheter has one sensor for
measuring the abdominal pressure (P
abd
).
