System for delivering pain-reduction medication

• US 6,768,920 B2
• Filed: 10/12/2001
• Issued: 07/27/2004
• Est. Priority Date: 07/06/2000
• Status: Expired due to Fees

• Current Assignee: Algodyne Limited
• Original Assignee: Algodyne Limited
• Inventors: Lewinsky, Reuven, Lange, Daniel H.
• Primary Examiner(s): Marmor, Charles
• Assistant Examiner(s): Mallari, Patricia C.
• Application Number:
  US09/977,448
• Publication Number:
  US 20020128567A1
• Time in Patent Office: 1,019 Days
• Field of Search: 604/65-67, 604/890--89, 604/512, 600/514-545, 600/300-301
• US Class Current: 600/545
• CPC Class Codes: A61B 5/1106 to assess neuromuscular blockade, e.g. to estimate depth of anaesthesia
• CPC Class Codes: A61B 5/291 for electroencephalography [EEG]
• CPC Class Codes: A61B 5/4824 Touch or pain perception evaluation A61B5/4821 takes precedence
• CPC Class Codes: A61B 5/483 by thermal stimulation
• CPC Class Codes: A61B 5/6833 Adhesive patches

Abstract

Methods, apparatuses and systems relating to the objective measurement of the subjective perception of pain in a subject are disclosed. In one aspect, a system for objectively measuring a subjective perception of pain by a subject comprises a plurality of electrodes, including a left channel electrode and a right channel electrode. The plurality of electrodes measures electrical activity at a respective plurality of sites on the subject to generate at least two sets of electrical activity measurements. The system further comprises a processor for processing the at least two sets of electrical activity measurements into at least two normalized signals, and comparing the at least two normalized signals to each other to identify the presence of pain in the subject.

Claims

1. A system for delivering medication for reducing pain in a subject comprising:

(a) a reservoir for containing the medication;

(b) a delivery device connected to the reservoir for delivering the medication to the subject;

(c) a delivery counter connected to the reservoir for measuring the medication transferred between the reservoir and the delivery device;

(d) an objective pain measurement device for objectively measuring a subjective perception of the pain in the subject;

(e) a medication delivery controller in communication with the objective pain measurement device, the delivery counter and the delivery device for controlling the amount of medication delivered to the subject by the delivery device based on a delivery rate communicated by the delivery counter and an objective pain measurement communicated by the objective pain measurement device.

2. The system of claim 1, further comprising an override device, electrically connected to the delivery controller for modifying the delivery of medication to the patient based on override factors detected from the patient.

3. The system of claim 1, wherein the reservoir is an IV fluid container, the delivery device is an infusion pump, the delivery controller is a pump controller, and the delivery counter is an IV drop counter.