Apparatus for detecting a condition of a medication infusion system and providing an informational signal in response thereto

• US 4,784,645 A
• Filed: 09/12/1986
• Issued: 11/15/1988
• Est. Priority Date: 11/04/1982
• Status: Expired due to Term

• Current Assignee: Johns Hopkins University
• Original Assignee: Johns Hopkins University
• Inventors: Fischell, Robert E.
• Primary Examiner(s): Jaworski, Francis J.
• Application Number:
  US06/906,714
• Time in Patent Office: 795 Days
• Field of Search: 128/DIG. 12, 128/DIG. 13, 604/891, 604/131, 604/65-67, 604/151-156, 340/605
• US Class Current: 604/153
• CPC Class Codes: A61M 2205/15 Detection of leaks
• CPC Class Codes: A61M 2205/3523 using telemetric means
• CPC Class Codes: A61M 2205/8243 by induction
• CPC Class Codes: A61M 5/14276 specially adapted for implantation
• CPC Class Codes: A61N 1/37258 Alerting the patient
• CPC Class Codes: G16H 20/17 delivered via infusion or injection
• CPC Class Codes: Y10S 128/13 Infusion monitoring

Abstract

A medication infusion system having a means for providing an informational signal when (1) medication in the reservoir falls below a threshold level; (2) a fluid leak occurs in different portions of the system; and (3) the intended medication pumping does not correlate with the pumping actually affected.

Claims

1. An apparatus for infusing medication into a living body comprising:

a medication reservoir means for storing medication to be infused;

a pulsatile pump means operably coupled to said reservoir means for pumping a dose of medication in response to an electrical pulse input;

means for applying said electrical pulse input to said pumping means;

an infusion output from which pumped medication exits the system and is dispensed to the patient;

a sensing means, disposed at the infusion output, for sensing the actuation of said pumping means and the dispensing of a dose of medication and transducing an electrical signal corresponding to each dispensed dose; and

,

a volume detecting means for detecting the volume of medication dispensed from said reservoir means, and including,

a counting means, operably coupled to said sensing means for counting the occurrences of said electrical signal corresponding to said dispensing dose, and

a means for providing an information signal when said counting means reaches a certain count number.

2. The apparatus of claim 1, wherein said volume detecting means further comprises a means for storing a valve for said count number.

3. The apparatus of claim 1, further comprising:

an acoustic transducer; and

,

a means responsive to said informational signal for actuating said acoustic transducer.

4. The apparatus of claim 1, further comprising:

a tickle means adapted for implantation for applying a subcutaneous electrical tickle to an intracorporeal location; and

,

a means responsive to said informational signal for actuating said tickle means.

5. A system for infusing medication into a patient comprising:

a pulsatile pump means for pumping a dose of medication in response to an electrical pulse input;

means for applying said electrical pulse input to said pumping means;

an infusion output from which pumped medication exits the system and is dispensed to the patient;

means, disposed at the infusion output, for sensing the actuation of said pumping means and the dispensing of a dose of medication and transducing a single corresponding electrical pulse for each dispensed dose,

means, receiving inputs from the electrical pulse transducing means and from the electrical pulse applying means, for comparing the number of applied electrical pulses with the number of transduced electrical pulses; and

,

means, connected to the comparing means, for generating an informational signal when the number of transducer electrical pulses deviate from the number of applied electrical pulses.