Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
  • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
  • A61M5/142—Pressure infusion, e.g. using pumps
  • A61M5/14244—Pressure infusion, e.g. using pumps adapted to be carried by the patient, e.g. portable on the body
  • A61M5/14276—Pressure infusion, e.g. using pumps adapted to be carried by the patient, e.g. portable on the body specially adapted for implantation
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
  • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
  • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
  • A61M5/16877—Adjusting flow; Devices for setting a flow rate
  • A61M5/16881—Regulating valves
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
  • A61M2205/00—General characteristics of the apparatus
  • A61M2205/35—Communication
  • A61M2205/3507—Communication with implanted devices, e.g. external control

Definitions

• Implantable infusion pump with an adjustable valve is an adjustable valve
• the invention relates to an implantable infusion pump according to the preamble of the main claim.
• Implantable infusion pumps are used for the continuous administration of medication, e.g. B. morphine, used in a constant dose over long periods. Compared to ordinary injections, they have the advantage that a dose no longer has to be overdosed to such an extent that, despite the fact that the medication has been broken down, a certain minimum dose is not undercut by the next time of administration, but instead a uniform and overall substantially reduced Supply of the drug can verwirkli ⁇ chen.
• medication e.g. B. morphine
• Such an infusion pump is known, for example, from DE 37 13 061 AI, the special construction of which, however, only solves a problem of the clogging delivery opening for the medicament in the body.
• the patient must first be adjusted to a new dose. This is usually done with a port system.
• the invention was therefore based on the object of providing an implantable infusion pump in which the flow rate can still be changed after the implantation.
• a preferred embodiment of the infusion pump is characterized in that the adjusting device consists of a valve with a valve body with a thread, which is mounted in a valve cylinder with a corresponding mating thread in such a way that a stroke of the valve body is achieved by turning the valve body . It is particularly recommended that a membrane is attached to the valve cylinder, on which the valve body acts during its stroke. The membrane forms a flexible closure without the need for special seals on the valve body.
• valve body instead of a membrane and the provision of a total closure, it is alternatively also possible to provide the valve body with a central shoulder at its inner end, so that it seals a correspondingly shaped inflow in one position and in at least one other position due to the stroke that has taken place, a precisely defined passage between the inflow and the valve body is present.
• the extension is a conical taper and the inflow is funnel-shaped.
• the membrane seals the inflow of the medicinal liquid in the bottom of the valve cylinder when the valve body is lowered before it seals the outflow. This prevents a further compression of the medication, should the outflow be closed first, convey it back into its storage chamber. Such reverse currents can be detrimental to the shelf life and sterility of certain drugs.
• the entire adjusting device is actuated via an engagement device on the head of the valve body, which is set up to connect with a tool for rotation.
• Such a possibility of operating the valves which is expediently to be provided on the side of the infusion pump facing the skin surface, can be made easily accessible to a person adjusting the pump, for example a doctor, by means of a small incision.
• the provision of a projection on the valve body, which is received by a corresponding arcuate recess in the valve cylinder, the dimensions of the recess limiting the rotatability of the valve body, has the further advantage that a person operating the valve cannot turn it over.
• the two positions of the valve are marked at the same time by the two clear stops.
• the rotation path is expediently chosen so that the two positions can be clearly distinguished.
• the membrane can have a thickened membrane edge, which runs in an intermediate space remaining between the valve cylinder and the bottom, and fixes the membrane at the edge. Such a membrane edge is easy to manufacture and permits strong mechanical stress on the edge of the membrane.
• the capillaries will be set up for 0.5 or 1.0 ml flow rate per 24 h.
• FIG. 1 shows the valve of an implantable infusion pump in a first embodiment in a sectional view, in the open position.
• FIG. 2 shows the valve from FIG. 1 in a top view, in the opened position
• 3 shows the valve from FIG. 1 in a sectional view, in the closed position
• FIG. 4 shows the valve from FIG. 1 in plan view, in the closed position
• FIG. 5 shows the valve of an implantable infusion pump in a second embodiment in a sectional view, in the open position.
• FIG. 6 shows the valve of an implantable infusion pump in a third embodiment with an attachment on the valve body in a sectional view, in the open position.
• valve device which consists of a valve body 10 with a thread, which is mounted in a valve cylinder 20 with a corresponding counter-thread in such a way that a turn of the valve is achieved by rotating the valve body 10 Til body 10 reached.
• valve body 10 Below the valve body 10, a membrane 12 with thickened edges 28 can be seen, on which the valve body acts during its stroke. In the course of its downward stroke, the valve body 10 reaches a position in which it blocks the inflow 14 through the pressure on the membrane 12 to a valve volume from which an outflow 16 ultimately leads into the body.
• FIG. 5 An alternative membrane fastening is shown in FIG. 5, in which the membrane 12 has no thickened edges 28 needed. There, in a second embodiment of the invention, the membrane 12 is clamped by the valve cylinder 20 within an outer valve cylinder 32.
• a bottom plate is attached to the valve cylinder 20, which has two channels 14, 16 for the inflow and outflow of the medicament liquid.
• the pump in the patient will first have to be uncovered regularly, but this is a very small operation in comparison to the previous exchange of the pump with a new connection of the catheter and sewing of the pump.
• the projection 24 has been realized in that a hole has been drilled through the valve cylinder 20 in the valve body 10 already inserted into the valve cylinder 20, into which a pin has been inserted in such a way that a projection 24 protrudes from the valve body 10. The resulting hole in the valve cylinder 20 is then welded again.
• the two capillaries now provided are set up for 0.5 or 1.0 ml flow rate per 24 h.
• the flow rates can thus be set to 0, 0.5, 1 and 1.5 ml.
• valve body 10 which can also partially shut off a correspondingly shaped inflow 14, in which case only one defined passage between the inflow 14 and the valve body 10 for the Flow of medication remains by twisting of the valve body 10 can be adjusted in size and closed.
• FIG. 6 A corresponding embodiment is shown in FIG. 6 with a valve body 10 with a conical extension which can be screwed into a funnel-shaped inflow 14.

Landscapes

• Health & Medical Sciences (AREA)
• Biomedical Technology (AREA)
• Hematology (AREA)
• Vascular Medicine (AREA)
• Engineering & Computer Science (AREA)
• Anesthesiology (AREA)
• Veterinary Medicine (AREA)
• Heart & Thoracic Surgery (AREA)
• Public Health (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Fluid Mechanics (AREA)
• Physics & Mathematics (AREA)
• Infusion, Injection, And Reservoir Apparatuses (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6419200

Family Applications (1)

Country Status (2)

Cited By (1)

Families Citing this family (3)

Citations (6)

Family Cites Families (4)

• 1990
  • 1990-11-29 DE DE19904038050 patent/DE4038050A1/de active Granted
• 1991
  • 1991-11-29 WO PCT/DE1991/000946 patent/WO1992009318A1/de not_active Ceased

Patent Citations (6)

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