4-active crystal probes for the ascending aorta and pulmonary artery in large animal models
 Transonic Systems' PAX-Series perivascular flowprobes are designed to measure cardiac output on the great vessels with a higher level of accuracy. Turbulent flow profiles in the ascending aorta and pulmonary artery necessitated a probe with uniform sensitivity. The lightweight, narrow probe body provides low impact instrumentation for vessel sites with non-uniform flow profiles or limited anatomical access.

• Aorta
• Pulmonary Artery
• Portal Vein

Choice of Size
8 mm, 10 mm, 12 mm, 14 mm, 16 mm, 20 mm, 24 mm, 28 mm, 32 mm, 36 mm. An exact fit on the vessel is not required, but the vessel should fill at least 80% of the probe opening. Probes implanted forA  measurements at a later date should fit loosely and not constrict the vessel.

PDFs Using PAX Probes Probe Validation Accuracy Specs Physical Specs Connectors Accessories Ordering Key

PAX-Series Flowprobe

Acute Use
mm	Series	Cat #
8	PAX	MA8 PAX
10	PAX	MA10 PAX
12	PAX	MA12 PAX
14	PAX	MA14 PAX
16	PAX	MA16 PAX
20	PAX	MA20 PAX
24	PAX	MA24 PAX
28	PAX	MA28 PAX
32	PAX	MA32 PAX
36	PAX	MA36 PAX

Chronic Use
mm	Series	Cat #
8	PAX	MC8 PAX
10	PAX	MC10 PAX
12	PAX	MC12 PAX
14	PAX	MC14 PAX
16	PAX	MC16 PAX
20	PAX	MC20 PAX
24	PAX	MC24 PAX
28	PAX	MC28 PAX
32	PAX	MC32 PAX
36	PAX	MC36 PAX

Chronic probe configuration must be specified. See chronic probe options to construct complete part numbers.

Validated In Vivo

Dean, D.A., Cabreriza, S.E., Jia, C-X, D'Alessandro, D.A., Sardo, M.J., Chalik, N., Soto, P.F., Dickstein, M.L., Spotnitz, H.M., "Validation Study of a New Transit-Time Ultrasonic Flow Probe for Continuous Measurements on the Great Vessels," ASAIO Journal Abstracts, Vol. 42, No. 2,  p. 26, 1996. (pig, ascending aorta, CO probe, right heart bypass model, calibrated roller pump)  (29V)

Remond, D., Ostigues, M.I., Isserty, A., Lefaivere, J., "Technical Note: Measuring Portal Blood Flow in Sheep Using An  Ultrasonic Transit Time Flow Probe," Journal of Animal  Science, Vol. 76,  No. 10, p. 2712-1216, 1998. (sheep,  portal vein) (39V)

A-Probe Accessories

	Product	Description	Effect on Probe Performance	Product Source
Vessel Padding	Ultracell	Soft, biodegradable, surgical wipe	Attenuates signal at implant; air absorded longterm: 20A 10% signal loss 10A: 15% signal loss	Transonic Cat # Apsponge
	Mersilene Mesh	Soft,A  interlocked, polyester fiber; nonabsorbable	Attenuates signal at: 20A 4% signal loss no offset change 10A: 25% signal loss, offset noisy	Transonic Cat # Apmersilene Ethicon RM-L
	Prolene Mesh	Stiff, polpropylene mesh; Nonabsorable	Attenuates signal at: 20A 30% signal loss no offset change 10A: 82% signal loss, offset noisy	Transonic Cat # Approlene Ethicon PMH
Probe Patch	Polyester Felt (Medical Grade)	Soft felt, nonabsorable	CS10	Sold by Impra C.R. Bard #008972
Clip Fixation	Bone Wax	Medical grade for orthopedic surgery	none	Ethicon W-31
	A-probe clips	Closure piece	Size dependent	Transonic Cat # FAC(probe size)A