Ultrasonic self-cleaning catheter system for indwelling drains a

Details Ultrasonic self-cleaning catheter system for indwelling drains a Ultrasonic self-cleaning catheter system for indwelling drains a

1985-10-15

1987-10-06

Pellegrino, Stephen C.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604 22, 128 24A, 128328, A61M 2500

Patent

active

046980580

ABSTRACT:
Vibration is conveyed to the proximal orifices of an indwelling catheter to disintegrate accumulated clogging deposits, large suspended particles and contaminating bacteria, viruses, fungi, etc. Orifices may be recessed, hooded or enclosed, and in some cases the catheter tip should be of absorptive material, to deter propagation of the vibration to the parts of the patient's body outside the catheter. Vibration may be conveyed to the orifices by (1) a solid fiber embedded in the catheter walls or positioned in an auxiliary lumen of the catheter; or (2) by a liquid in an auxiliary lumen--which may be formed as an annular space surrounding the main lumen. Preferably the apparatus measures the amount of vibration absorbed by the deposits or bacteria, etc., as a function of frequency, and automatically concentrates the vibration at frequencies where absorption is particularly high, to maximize the disintegration of deposits, particles, bacteria or other bioactive objects. Ultrasonic shear waves are thought more effective than compressional waves, but both may be used.

REFERENCES:
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patent: 3941122 (1976-03-01), Jones
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patent: 4136700 (1979-01-01), Broadwin et al.
patent: 4192294 (1980-03-01), Vasilevsky et al.
patent: 4474180 (1984-10-01), Angulo
patent: 4509947 (1985-04-01), Lattin
patent: 4516398 (1985-05-01), Wuchimich

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