Peritoneal dialysis apparatus

• US RE32,303 E
• Filed: 03/24/1977
• Issued: 12/09/1986
• Est. Priority Date: 07/31/1973
• Status: Expired due to Term

• Current Assignee: American Medical Products Incorporated
• Original Assignee: American Medical Products Incorporated
• Inventors: Jarrell, Bruce E., Lasker, Norman
• Primary Examiner(s): Truluck, Dalton L.
• Application Number:
  US05/781,031
• Time in Patent Office: 3,547 Days
• Field of Search: 128/213, 128/214 R, 128/214 E, 128/214 Z, 128/227, 128/230, 128/273, 128/274
• US Class Current: 604/29
• CPC Class Codes: A61M 1/1643 with weighing of fresh and used dialysis fluid
• CPC Class Codes: A61M 1/28 Peritoneal dialysis ; Other peritoneal treatment, e.g. oxygenation

Abstract

A peritoneal dialysis apparatus comprising a plurality of components including a catheter, a fluid heater, a fluid weighing means and a control device. The components are interconnected by conduits so that fluid can flow from the heater to the peritoneal cavity by way of the catheter, and then from the peritoneal cavity to the weighing means. The weighing means measures the quantity of discharged fluid as a result of the introduction of the dialysis fluid to check that the dialysis fluid is causing fluid to drain from the peritoneal cavity. The flow of fluid between the components of the system is controlled by valves which are selectively opened and closed.

Claims

1. A dialysis apparatus comprising first means for supplying dialysis fluid, second means for measuring a predetermined quantity of dialysis fluid, a catheter, third means for detecting a minimum quantity of dialysis fluid, means for supporting said first means above said second means, said second means above said catheter, and said third means below said catheter so that dialysis fluid moves through said apparatus under the force of gravity, fluid flow conduits interconnected between said first and second means.[.,.]. .Iadd.and between .Iaddend.said second means and said catheter and .Iadd.between .Iaddend.said catheter .[.in.]. .Iadd.and .Iaddend.said third means, fourth means .Iadd.including a single actuator for plural valves .Iaddend.for .Iadd.simultaneously .Iaddend.regulating the flow of dialysis fluid .[.and.]. .Iadd.in .Iaddend.said .[.conduits.]. .Iadd.conduit .Iaddend.between said first and second means and .Iadd.the conduit between .Iaddend.said catheter and said third means .Iadd.in a manner so that flow is simultaneously on or off.Iaddend., fifth means .Iadd.including a single actuator for plural valves .Iaddend.for .Iadd.simultaneously .Iaddend.regulating the flow of dialysis fluid .Iadd.in the conduit .Iaddend.between said second means and said catheter.[.,.]. and .Iadd.a conduit .Iaddend.from said third means .Iadd.in a manner so that flow is simultaneously on or off.Iaddend., and means for controlling said .Iadd.actuators for said .Iaddend.fourth and fifth means to alternately permit flow of dialysis fluid in the conduits regulated thereby so that the dialysis fluid is permitted to flow through said apparatus and a patient and then from said third means.

2. A dialysis apparatus as defined in claim 1 including an alarm, means coupling said third means to said alarm, and means for enabling said alarm if said third means fails to detect a minimum quantity of dialysis fluid.

3. A dialysis apparatus as defined in claim 2 wherein said third means comprises a frame, an arm, said arm being pivotally supported by said frame intermediate its ends, a fluid receptacle coupled to said arm on one side of said pivot, means comprising a counterweight coupled to said arm on the other side of said pivot, and said means for enabling said alarm is disposed adjacent said arm for actuation thereby if the weight of dialysis fluid in said fluid receptacle is insufficient to overcome the force of said counterweight means.

4. A dialysis apparatus as defined in claim 1 wherein said second means .[.includes.]. .Iadd.is removably mounted in a housing .Iaddend.means for heating dialysis liquid .[.therein.]. .Iadd.in said second means .Iaddend.to a predetermined temperature.

5. A dialysis apparatus as defined in claim 1 including a fluid flow conduit extending from said third means, and a discharge receptacle connected to said last named fluid flow conduit to receive dialysis fluid from said third means.

6. A dialysis apparatus as defined in claim 1 wherein said control means comprises a shaft, first and second cams mounted on said shaft, one of said cams controlling said fourth means .Iadd.actuator.Iaddend., the other cam controlling said fifth means .Iadd.actuator.Iaddend., energizable means for rotating said shaft, and means for selectively energizing and de-energizing said energizable means to selectively rotate said shaft.

7. A dialysis apparatus comprising first means for supplying dialysis fluid, second means for measuring a predetermined quantity of dialysis fluid, a catheter, third means for detecting a minimum quantity of dialysis fluid, said third means comprises a frame, an arm, said arm being pivotedly supported by said frame intermediate its ends, a .Iadd.removable .Iaddend.fluid receptacle coupled to said arm on one side of said pivot, means comprising a counter weight coupled to said arm on the other side of said pivot, and said means for enabling said alarm is disposed adjacent said alarm for actuation thereby if the weight of dialysis fluid on said fluid receptacle is insufficient to overcome the force of said counter weight means, fluid flow conduits interconnected between said first and second means, said second means and said catheter, and said catheter and said third means, fourth means for .Iadd.simultaneously .Iaddend.regulating the flow of dialysis fluid in said conduits between said first and second means and said catheter .[.in.]. .Iadd.and .Iaddend.said third means, fifth means for .Iadd.simultaneously .Iaddend.regulating the flow of dialysis fluid between said second means and said catheter, and from said third means, and means for controlling said fourth and fifth means to alternately permit flow of dialysis fluid in the conduits regulated thereby so that the dialysis fluid is permitted to flow through said apparatus and the patient and then from said third means, said control means comprises a shaft, first and second cams mounted on said shaft, one of said cams controlling said fourth means, and other cam controlling said fifth means, energizable means for rotating said shaft, and means for selectively energizing and de-energizing said energizable means to selectively rotate said shaft.

8. A dialysis apparatus comprising first and second means for regulating the flow of dialysis fluid through said apparatus, means coupling said first and second regulating means to each other so that when said coupling means is a first position said first regulating means stops the flow of dialysis fluid and said second regulating means permits the flow of dialysis fluid, and when said coupling means is in a second position said first regulating means permits the flow of dialysis fluid while said second regulating means stops the flow of dialysis fluid, selectively energizable means for alternatively positioning said coupling means between its first and second positions, said selectively energizable means being mechanically connected to said coupling means, first, second and third timers, said first timer for controlling the duration of time in which said coupling means is in a first position, said first timer including means to emit a control signal when said first timer times out, electrical means for transmitting said control signal from said first timer to said selectively energizable means, said selectively energizable means adapted to be energized in response to said control signal so that said selectively energizable means causes said coupling means to be positioned in the second position, said electrical means also to transmit said control signal to said second and third timers, said second and third timers to automatically reset and start timing out in response to such signal, said third timer for controlling the duration of time in which said coupled regulating means are in the second position, said third timer including means to emit a control signal when said third timer times out, electrical means for transmitting said control signal from said third timer to said selectively energizable means, said selectively energizable means adapted to be energized in response to said control signal so that said selectively energizable means causes said coupling means to be positioned in the first position, said electrical means also to transmit said control signal to said first timer, said first timer to automatically reset and start timing out in response to such signal, an energizable alarm and a switch, said switch being operative to enable said alarm upon a condition, said second timer having a shorter timing duration than said third timer and being electrically connected to said third timer and said energizable alarm so that if the alarm is enabled when said second timer times out, said alarm is energized and said third timer stops timing out until said condition no longer exists.

9. A dialysis apparatus defined in claim 8, including overriding means for selectively generating a control signal to said first timer in said selectively energizable means, said first timer to automatically rewind and start timing out in response to said control signal, said selectively energizable means to be energized in response to said control signal so that selectively energizable means causes said coupling means to be positioned in the first position, said overriding means to be operable independently of said first, second or third timers.

10. A dialysis apparatus defined in claim 8, including overriding means for selectively generating a control signal to said second and third timers and to said selectively energizable means, said second and third timers to automatically rewind and start timing out in response to said control signal, said selectively energizable means to be energized in response to said control signal so that selectively energizable means causes said coupling means to be positioned in the second position, said overriding means to be operable independently of said first, second or third timers. .Iadd.

11. A prepackaged sterilized peritoneal dialysis apparatus comprising:

(a) a first collapsible measuring bag adapted to receive dialysis fluid and having a single inlet-outlet,

(b) a second collapsible weighing bag adapted to receive dialysis fluid from a patient and having a single inlet-outlet,

(c) at least six lengths of flexible tubing,

(d) a first length of said tubing having one end directly connected to the inlet-outlet of said first bag, a second length of said tubing having one end connected at a junction to the other end of said first length of tubing, the other end of said second length of tubing being adapted to be connected to a source of dialysis fluid,

(e) a third length of said tubing having one end adapted to be in communication with a catheter, the other end of said third length of tubing being connected through a junction to the interconnected ends of said first and second lengths of tubing,

(f) a fourth length of said tubing having one end directly connected to the inlet-outlet of said second bag,

(g) a fifth length of said tubing having one end in communication with said third tubing, the other end of said fifth length of tubing being connected through a junction to the other end of said fourth length of tubing,

(h) a sixth length of tubing having one end adapted to be connected to a waste disposal, the other end of said sixth length of tubing being connected at the last mentioned junction to the interconnected ends of said fourth and fifth lengths of tubing,

(i) whereby said third length of tubing may be used to feed fluid to a patient and the fifth tubing may be used to transfer fluid drained from a patient to said second bag via said fourth tubing. .Iaddend.