Pumps – Expansible chamber type – Elongated flexible chamber wall progressively deformed
Patent
1983-10-24
1985-09-10
Gluck, Richard E.
Pumps
Expansible chamber type
Elongated flexible chamber wall progressively deformed
418 45, 604153, F04B 4312, F04B 4508
Patent
active
045403511
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD AND PRIOR ART
In PCT International Publication No.W082/03254, entitled "MINIATURE ROTARY INFUSION PUMP WITH SLIDE LATCH AND DETACHABLE POWER SOURCE", (corresponding to Cremie U.S. Pat. No. 4,416,595) wearable pumps for continuous medicament administration are disclosed. As one type of use for such pumps, a chemotherapeutic agent or the like may be continuously administered to a tumor site of a patient, for example in the liver or pancreas, through an implanted catheter, while the infusion pump, being small enough to be carried or worn, continuously pumps a predetermined dose of chemotherapeutic agent on a continuous 24 hour a day basis. Excellent clinical results have been achieved by this type of treatment. Alternatively, medicines or other solutions having higher dosage requirements may also be applied by the pump.
It is, of course, most desirable for the patient to be able to load new supplies of solution into such a pump for controlled 24 hour delivery thereof. However, since the pump may be small to be wearable and since the patient may be elderly or debilitated, it is desirable for the loading technique to be as simple and as foolproof as possible. While the cited PCT publication represents an improvement in this respect over the devices of respectively U.S. Pat. No. 3,908,657, and Belgian Pat. No. 886,687 entitled "MINIATURE INFUSION PUMP", this present application in turn provides an improvement in the ease and foolproof characteristic of loading of a tiny solution bag into a small, wearable pump in which the tubing is properly positioned for the desired reliable pumping which can be provided by the pump of this invention. Thus by this invention the therapy which is available through a miniature pump capable of administering medication on a 24 hour basis becomes available to even more people despite visual handicaps, age, and state of debilitation, to open up this promising therapy to such people without the need of as frequent medical supervision, permitting the people to live at home and to go about daily activities while being treated. This pump can be used to pump a self-contained, small bag of solution, and it can be also used to pump larger volumes of parenteral and other solution as desired.
DESCRIPTION OF THE INVENTION
In accordance with this invention a pressure pump for fluids through flexible tubing is provided which comprises a pressure member of generally circular periphery and means for moving the pressure member in orbital motion about an axis of rotation. A sleeve member is also positioned about the pressure member and spaced for receiving and retaining the flexible tubing in an annular space between the pressure member and the sleeve member, with the tubing surrounding the pressure member for pumping of fluids through the tubing.
The sleeve member is divided into a pair of jaws attached together at one end in hinged relation to permit opening and closing of the jaws about the pressure member to facilitate installation of the tubing.
In accordance with this invention, the jaws define end surfaces which abut together in the closed position, and slots defined through the end surfaces communicating between the annular space and the area outside the pressure pump to receive lengths of the flexible tubing occupying the annular space and extending into and out of the annular space through the slots.
The slots are preferably proportioned to cause the lengths of tubing in the slots to abut together while the jaws are closed, to reduce the possibility of fluid leakage through the tubing when the pressure member is displaced in its orbital motion toward the abutting lengths of tubing in the slots. Thus it becomes possible for no leakage to take place through the tubing when the pressure pump is stopped, irrespective of the orbital position of the pressure member, since the tubing will be compressed, blocking flow, by the orbital member in any of its orbital positions.
It may also be preferable for the slots to permit the lengths of tubing therein to each be folded about an
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Baxter Travenol Laboratories Inc.
Ellis Garrettson
Flattery Paul C.
Gluck Richard E.
Ryan Daniel D.
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