WO1999029367A1 - Appareil medical portatif - Google Patents

Appareil medical portatif Download PDF

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Publication number
WO1999029367A1
WO1999029367A1 PCT/US1998/026400 US9826400W WO9929367A1 WO 1999029367 A1 WO1999029367 A1 WO 1999029367A1 US 9826400 W US9826400 W US 9826400W WO 9929367 A1 WO9929367 A1 WO 9929367A1
Authority
WO
WIPO (PCT)
Prior art keywords
pain
patient
treatment
level
output
Prior art date
Application number
PCT/US1998/026400
Other languages
English (en)
Inventor
Poonam Agarwala
Alexander N. Kipnis
Andrzej M. Malewicz
Original Assignee
Empi Corp.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US08/990,080 external-priority patent/US6041259A/en
Priority claimed from US08/989,304 external-priority patent/US6044303A/en
Application filed by Empi Corp. filed Critical Empi Corp.
Priority to AU18197/99A priority Critical patent/AU1819799A/en
Publication of WO1999029367A1 publication Critical patent/WO1999029367A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/48—Other medical applications
    • A61B5/4824—Touch or pain perception evaluation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/36014—External stimulators, e.g. with patch electrodes
    • A61N1/36021—External stimulators, e.g. with patch electrodes for treatment of pain

Definitions

  • the present invention relates to a device which is attached to a patient's clothing, and can be opened to allow access to a control panel. More particularly, the present invention relates to a transcutaneous electrical nerve stimulation (TENS) device which is worn by a patient and which allows the patient to control treatment while storing information used to evaluate the effectiveness of the pain treatment.
  • TENS transcutaneous electrical nerve stimulation
  • the present invention also relates to a system and method for monitoring the effectiveness of a pain treatment. More particularly, it relates to an electronic pain scale and feedback system used in conjunction with a pain treatment program to provided information regarding pain treatment effectiveness based upon entry and storage of perceived levels of pain experienced by a patient.
  • TENS transcutaneous electrical nerve stimulation
  • a TENS system sends controlled bursts of electrical impulses into muscles and nerves at particular surface points. A mild vibrating sensation is felt by the patient using the TENS system. The pulses induce the patient's nervous system to raise its own natural substances, which prevent pain signals from reaching the brain.
  • a TENS device can be used by a patient numerous times throughout the day whenever a patient desires pain relief.
  • the most common method for measuring pain and validating the effectiveness of a pain treatment is the manual pain rating scale.
  • the manual pain rating scale operates independently from the particular pain treatment being used.
  • the three most common types of manual pain rating scales are the Visual Analog Scale, the Verbal Descriptor Scale and the Numeric Pain Scale.
  • the Visual Analog Scale (VAS) consists of a straight line drawn on a piece of paper, the ends of which define the extreme limits of the pain experienced.
  • the Verbal Descriptor Scale (VDS) consists of a series of adjectives which describe different levels of pain.
  • a Numeric Pain Scale uses a series of consecutive numbers (e.g. from 1 to 10) with the smallest number representing "no pain” and the largest number representing "worst pain imaginable”.
  • the absolute approach measures the severity of the pain at a particular point in time.
  • the comparative approach provides a measurement of the change in pain over time.
  • the manual pain rating scale is devised simply to measure the magnitude or intensity of pain at an arbitrary point in time.
  • the manual pain rating scale may be used in conjunction with a pain treatment in an attempt to gauge the effectiveness of that treatment.
  • the manual pain rating scale has a number of inadequacies.
  • the manual pain rating scale is used primarily for clinical purposes by a practiced clinician. The form is completed on the periodic occasion when a patient visits his or her clinician. Therefore, records are not kept each and every time the pain treatment is used, rendering any data taken skewed and of limited value.
  • the manual pain rating scale does not "record" the pain level before and after each pain treatment.
  • the manual pain rating scale does not take into account the level of pain treatment being administered.
  • the manual pain rating scale does not have the ability to store the duration of a pain treatment session.
  • the level of pain being experienced by the patient should be measured before each and every use of the pain treatment to provide an accurate history of the patient. Similarly, the measure of change in pain level following each pain treatment session is required to accurately determine the effectiveness of the treatment. The intensity level of each pain treatment and the length of a pain treatment session are necessary to provide an adequate explanation of the overall effectiveness. Importantly, the pain and pain treatment related data should be stored to create, in effect, a diary documenting a patient's improvement and correlation of the improvement to the pain treatment employed. The manual pain rating scale simply does not have these capabilities.
  • the present invention is a medical device which is worn by a patient and which can be viewed and operated without removing the device from the patient's clothing.
  • the device includes a case and a cover which are pivotally connected together.
  • a control panel including a display and a plurality of inputs is mounted on the case.
  • a clip on the cover attaches the cover to a patient's clothing so that the cover is generally vertical.
  • a latch holds the case in a closed position adjacent the cover so that the control panel is generally vertical and located between the case and cover.
  • the case is allowed to pivot to a first open position in which the control panel is generally horizontal and is viewable and accessible by the patient.
  • a stop element on the case engages the cover to define the first open position.
  • the present invention provides an electronic pain intensity scale and feedback system for recording a patient's level of pain before and after a treatment session to determine overall effectiveness of a pain treatment.
  • the system comprises an electronic pain intensity scale used in conjunction with a pain treatment device.
  • a memory device is connected to an electronic pain intensity scale to store data produced by the electronic pain intensity scale regarding the level of pain experienced by the patient. The combination of these components provide information necessary for establishing and validating the effectiveness of the pain treatment.
  • the electronic pain intensity scale is accessible by the patient and includes zones representing various levels of perceived pain. In response to a particular entry on the electronic pain intensity scale by the patient, a data signal representative of the level of pain is produced.
  • the data signal produced by the electronic pain intensity scale is received by the memory device.
  • the memory device stores the data signal representative of the patient's perceived level of pain.
  • the memory device will store the patient's initial level of pain prior to a pain treatment session, along with the perceived level of pain when the session is completed.
  • the memory device will receive and store data signals representing duration and intensity of the pain treatment session.
  • the method of using the electronic pain intensity scale and feedback system requires the patient to indicate on the input device the level of pain being experienced prior to beginning a pain treatment session.
  • the level of pain data is processed by the electronic pain intensity scale, resulting in a signal which is stored.
  • the pain treatment device is activated. Depending upon the type of pain treatment being used, the patient may at this point increase the intensity of the pain treatment to a desired level.
  • the pain treatment is then administered. To end the pain treatment session, the patient again enters his or her current pain level via the electronic pain intensity scale. This data is then stored.
  • the intensity level of the pain treatment administered and the length of treatment time are also stored. Over the course of several treatment sessions, a sufficient amount of data is accumulated to provide a correlation as to the effectiveness of the pain treatment being used.
  • FIGS. 1A-1C are perspective views of a TENS device in a closed position and in first and second open positions, respectively .
  • FIG. 2 is a side view of the TENS device.
  • FIG. 3 is a rear view of the TENS device.
  • FIG. 4 is a front view of the control panel and the inside surface of the cover with the TENS device in the second open position.
  • FIG. 5 is an electrical block diagram of the TENS device.
  • TENS device 20 which includes an electronic pain intensity scale and feedback system is shown in FIGS. 1A-1C, 2 and 3.
  • TENS device 20 includes case 22 and back cover 24. Back cover 24 is clipped to a patient's belt B by belt clip 26 when TENS device 20 is in use by the patient.
  • Back cover 24 is pivotally connected to case 22.
  • case 22 and back cover 24 are adjacent one another in a "closed" position.
  • a pair of resilient clips or fingers 28A and 28B extend from the top of back cover 26 and hold case 22 in the closed position.
  • Tab 30A (at the top of back cover 24) and tab 30B (at the top of case 22) are pried apart to release case 22 from fingers 28 and open TENS device 20.
  • TENS device 20 provides two output channels (“channel 1" and "channel 2") .
  • Output terminals 32A and 32B are the channel 1 output terminals
  • terminals 34A and 34B are the channel 2 output terminals.
  • TENS device 20 is battery powered. Access to the battery compartment is provided through battery compartment cover 36 on the front side of case 22.
  • case 22 has been pivoted to a first "open" position, where control panel 40 is accessible for viewing and actuation by the patient.
  • case 22 is oriented at approximately 90° to back cover 24 so that case 22 is generally horizontal.
  • Control panel 40 is oriented so that it can be read and used by the patient when device 20 is mounted on belt B (or a waistband or pocket) and is open as shown in FIG. IB.
  • FIG. 1C shows case 22 as it has been pivoted beyond the first open position to a second open position. In this second open position, case 22 and cover 24 are at approximately 180° to one another. The second open position is particularly useful when TENS device 20 is placed on a flat surface, such as a table.
  • the first open position (shown in FIG. IB) is defined by shoulder 42 (FIGS. 1C and 3) on case 22.
  • shoulder 42 FIGGS. 1C and 3
  • case 22 pivots outward and downward until lower edge 44 of back cover 24 engages shoulder 42.
  • Back cover 24 is molded plastic, and has sufficient resiliency so that it can be flexed to some extent. By gently pressing on shoulder release region 46 of back cover 24, the patient (or clinician) can flex the center portion of back cover 24 sufficiently to move lower edge 44 out of engagement with shoulder 42. This allows case 22 to continue to pivot downward with respect to back cover 24. As shown in FIG. 1C and FIG. 3, shoulder 42 does not extend the entire width of case 22, but rather is located in a central part. This allows clearance to be achieved between shoulder 42 and the center portion of lower edge 44 of back cover 24 when pivoting case 22 to the second open position illustrated in FIG. 1C. As shown in general in FIGS. IB and 1C, and in more detail in FIG.
  • control panel 40 includes display 48, channel 1 intensity control inputs 50A and 50B, channel 2 intensity control inputs 52A and 52B, pre-programmed (PPR) selection inputs 54A and 54B, and electronic pain intensity scale 56 (with inputs 56A-56F) .
  • PPR pre-programmed
  • Display 48 allows the patient to view inputted data, current intensity settings, and treatment results. Display 48 also allows the clinician to retrieve data concerning the effectiveness of a patient's treatment.
  • the channel 1 intensity control inputs 50A and 50B and channel 2 intensity control inputs 52A and 52B allow the patient to regulate the intensity of the treatment being administered.
  • the channel 1 intensity control inputs 50A and 50B and channel 2 intensity control inputs 52A and 52B are labeled "Intensity”.
  • Inputs 50A and 52A are labeled with a "+" denoting an increase in intensity, while inputs 50B and 52B are labeled with a "-" denoting a decrease in intensity.
  • the (PROG) selection inputs 54A and 54B are designed to allow the patient to select from a number of pre-programmed treatment regimens which are listed on inside surface 24A of cover 24 as "Program Options".
  • the pre-programmed regimen selection inputs 54A and 54B are labeled "PR0G+” and "PROG-", respectively.
  • the PR0G+ input 54A allows the patient to scroll forward through the list of regimens
  • PROG- input 54B allows the patient to scroll backwards .
  • the data menu provides the clinician with information related to the patient's treatment such as number of sessions, decrease in pain relief, percent of sessions with pain relief, average session length, channel 1 intensity range, and channel 2 intensity range.
  • the data menu is listed on inside surface 24A of cover 24 as "Data Codes”.
  • Electronic pain intensity scale 56 is preferably formed by an array of membrane switch inputs 56A-56F.
  • the different areas of scale 56 are labeled to represent the different levels of pain inputted by the patient. Each area is associated with one of the plurality of inputs 56A-56F.
  • Each input 56A-56F represents a different level of pain.
  • scale 56 ranges from "No Pain" input 56A to "Slight” input 56B, to "Moderate” input 56C, to "High” input 56D, to "Severe” input 56E, to "Unbearable” input 56F. Therefore, the plurality of inputs 56A-56F, from left to right, represent increasing levels of perceived pain. As will later be described, depending upon which of the plurality of indicator inputs is selected, pain data is produced and stored.
  • FIG. 5 is a block diagram of TENS device 20, which provides further detail of the inner components.
  • TENS device 20 includes display 48, channel 1 intensity control inputs 50A and 50B, channel 2 intensity control inputs 52A and 52B, PROG selection inputs 54A and 54B, electronic pain intensity scale inputs 56A-56F, battery 58, power circuit 60, low voltage detect circuit 62, microprocessor 64, non-volatile memory 66, channel 1 output driver 68, channel 1 output transformer 70, channel 1 output terminals 32A and 32B, channel 2 output driver 74, channel 2 output transformer 76, and channel 2 output terminals 34A and 34B.
  • TENS electrodes 78A and 78B are connected, through lead wires 80A and 80B, to channel 1 output terminals 32A and 32B, respectively.
  • TENS electrodes 82A and 82B are connected, through lead wires 84A and 84B, to channel 2 output terminals 34A and 34B.
  • the patient Before a treatment session can begin, the patient must indicated his or her present level of perceived pain on the electronic pain intensity scale 56.
  • the patient has six choices (inputs 56A-56F) to aid in subjectively assessing his or her pain levels. These choices range from “No Pain” to "Unbearable”.
  • the patient enters his or her perceived level of pain by pressing an appropriate location on the electronic pain intensity scale 56.
  • Device 20 is normally powered up, but the microcontroller 64 is maintained in a stop mode to minimize power consumption.
  • any input (56A-56F) on scale 56 is pressed, a signal is sent to microprocessor 64.
  • the signal activates microprocessor 64 and pain level data from the electronic pain intensity scale 56 is read and stored in memory 66 by microprocessor 64.
  • the microprocessor 64 also stores the current time, which is maintained by the real time clock within microprocessor 64. After an initial pain level has been entered, treatment can begin.
  • the patient selects one of the pre-programmed regimens by scrolling through the list of pre-programmed regimens using the PROG selection inputs 54A and 54B and viewing the selection on display 48.
  • the patient uses channel 1 and channel 2 intensity control inputs 50A and 50B and 52A and 52B to adjust stimulation intensity for channels 1 and 2.
  • Microprocessor 64 controls channel 1 output driver 68 based upon the regimen selected through PROG selection inputs 54A and 54B and the intensity level selected through channel 1 intensity control inputs 50A and 50B.
  • the output of channel 1 output driver 68 is supplied through transformer 70 to channel 1 output terminals 32A and 32B.
  • TENS electrodes 78A and 78B are connected through lead wires 80A and 80B, respectively, to channel 1 output terminals 32A and 32B.
  • TENS electrodes 78A and 78B are applied to the skin of the patient at the desired location to provide pain relief.
  • microprocessor 64 controls channel 2 output driver 74 based upon the regimen selected and the intensity level selected through channel 2 intensity control inputs 52A and 52B.
  • channel 2 output driver 74 The output of channel 2 output driver 74 is supplied through transformer 76 to channel 2 output terminals 34A and 34B.
  • TENS electrodes 82A and 82B are connected through lead wires 84A and 84B, respectively, to terminals 34A and 34B.
  • the output of channel 2 output driver 74 therefore, is supplied to the patient through TENS electrodes 82A and 82B.
  • Microprocessor 64 stores the pain level input from one of pain level switches 56A-56F, together with the starting time when the pain scale switch was actuated, and the intensity setting for channel 1 and channel 2. If, during the course of a treatment session, the patient changes the intensity level, the new level and the time of change is recorded by microprocessor 64 in non-volatile memory 66. To end a treatment session, the patient again presses one of the pain scale switches 56A-56F. The patient has been instructed to press the input 56A-56F representing perceived pain at the time that the treatment has stopped. Upon receiving the second key press from pain scale switches 56A-56F, microprocessor 64 controls output drivers 68 and 74 to stop the treatment. In addition, microprocessor 64 records the final pain scale level (based upon which switch 56A-56F was pressed) together with the time. The recorded time can either be a real clock time, or can simply be a duration since the treatment session started.
  • TENS device 20 is able to aid the clinician in determining the effectiveness of the pain relief by displaying, on display 48, the percent of treatment sessions that recorded pain relief, and the degree of pain relief most often obtained. Device 20 also displays other helpful treatment assessment data such as the most frequently used intensity for each channel, the total number of treatment sessions, and the average length of each session. By using this information, the clinician can determine a patient's progress and whether the device was used appropriately. All of this information is based upon the pain scale input, time, and intensity data stored by microprocessor 64 in non-volatile memory 66 for each treatment session. The data stored by microprocessor 64 in memory 66 (such as beginning pain level, ending pain level, duration and intensity) is also available for review by a clinician via display 48. This data can be in raw form, or microprocessor 64 will provide analysis of the data. The data or analyzed information is displayed by microprocessor 64 on display 48 when PPR+ and PPR- inputs 52A and 52B are pressed simultaneously .
  • TENS device 20 allows real time measurement of subjective perceptions or sensations and provides invaluable data for determining the effectiveness of a pain treatment.
  • Device 20 is easy to use and allows measurements to be made in the real world of the patient i.e., in the home or at work. Further, device 20 forces the patient to consistently enter pain data, as the TENS treatment is only activated and deactivated upon entry of information on pain scale 56.
  • the information output from device 20 can be used in a wide variety of applications and can provide a statistical correlation for evaluation of a pain treatment or the consistency of the patient's response.
  • Device 20 can automatically calculate statistical parameters, such as a trend of the patient's pain and a histogram of the patient's pain levels grouped daily, weekly, or monthly.
  • the pain scale inputs with indicator zones labeled "No Pain”, “Slight”, “Moderate”, “High”, “Severe”, and “Unbearable” are also used advantageously in a device which includes a microprocessor and non-volatile memory, but does not include TENS outputs. That device can be used to record effectiveness of various pain treatments (such as medicinal treatments and non-medicinal treatments, including TENS) .

Abstract

On décrit un appareil médical portatif (20), tel qu'une unité de stimulation nerveuse électrique transcutanée (TENS), constitué d'un boîtier (22) et d'un couvercle (24) reliés par articulation. Le couvercle (24) se fixe au vêtement d'un patient au moyen d'un clip (26). En position fermée, un panneau de contrôle (40) muni d'un affichage (48) et de moyens d'entrée est placé entre le boîtier (22) et le couvercle (24). La libération d'un loquet permet de faire pivoter le boîtier (22) pour l'éloigner du couvercle (24) vers une première position ouverte dans laquelle le panneau de contrôle (40) est généralement horizontal et permet au patient de visualiser le panneau de contrôle (40) et d'y accéder sans qu'il soit nécessaire de dégrafer l'appareil (20) du vêtement du patient. L'appareil médical TENS (20) inclut un moyen de saisie pour indiquer l'échelle d'intensité de la douleur et le patient peut utiliser ce moyen pour lancer ou interrompre un traitement contre la douleur. Des données d'entrée et des données de durée et d'intensité de la douleur sont stockées, analysées et affichées pour aider le clinicien à évaluer l'efficacité du traitement contre la douleur.
PCT/US1998/026400 1997-12-12 1998-12-11 Appareil medical portatif WO1999029367A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU18197/99A AU1819799A (en) 1997-12-12 1998-12-11 Externally worn medical device

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US08/989,304 1997-12-12
US08/990,080 US6041259A (en) 1997-12-12 1997-12-12 Externally worn medical device
US08/990,080 1997-12-12
US08/989,304 US6044303A (en) 1995-09-13 1997-12-12 TENS device with electronic pain intensity scale

Publications (1)

Publication Number Publication Date
WO1999029367A1 true WO1999029367A1 (fr) 1999-06-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/026400 WO1999029367A1 (fr) 1997-12-12 1998-12-11 Appareil medical portatif

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AU (1) AU1819799A (fr)
WO (1) WO1999029367A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2801186A1 (fr) * 1999-11-24 2001-05-25 Hoechst Houde Lab Dispositif electronique de releve d'intensite de douleur pour utilisation clinique par patients et medecins, en medecine ambulatoire ou hospitaliere
EP2266660A1 (fr) * 2009-06-27 2010-12-29 Horst Dittmann Appareil de stimulation électrique pour plusieurs utilisateurs
CN105125172A (zh) * 2015-06-24 2015-12-09 广州三瑞医疗器械有限公司 基于面部图像识别的镇痛控制方法及其装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2624373A1 (fr) * 1987-12-14 1989-06-16 Racia Sa Dispositif pour mesurer la douleur
EP0532143A1 (fr) * 1991-09-12 1993-03-17 BIOTRONIK Mess- und Therapiegeräte GmbH & Co Ingenieurbüro Berlin Neurostimulateur
US5578060A (en) * 1995-06-23 1996-11-26 Chattanooga Group, Inc. Physical therapy apparatus having an interactive interface, and method of configuring same
US5692500A (en) * 1995-01-09 1997-12-02 Gaston-Johansson; Fannie Pain measurement and recording tool and method
EP0811395A2 (fr) * 1996-06-07 1997-12-10 Quest Medical, Inc. Stimulateur de tissus multiprogrammable

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2624373A1 (fr) * 1987-12-14 1989-06-16 Racia Sa Dispositif pour mesurer la douleur
EP0532143A1 (fr) * 1991-09-12 1993-03-17 BIOTRONIK Mess- und Therapiegeräte GmbH & Co Ingenieurbüro Berlin Neurostimulateur
US5692500A (en) * 1995-01-09 1997-12-02 Gaston-Johansson; Fannie Pain measurement and recording tool and method
US5578060A (en) * 1995-06-23 1996-11-26 Chattanooga Group, Inc. Physical therapy apparatus having an interactive interface, and method of configuring same
EP0811395A2 (fr) * 1996-06-07 1997-12-10 Quest Medical, Inc. Stimulateur de tissus multiprogrammable

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2801186A1 (fr) * 1999-11-24 2001-05-25 Hoechst Houde Lab Dispositif electronique de releve d'intensite de douleur pour utilisation clinique par patients et medecins, en medecine ambulatoire ou hospitaliere
EP2266660A1 (fr) * 2009-06-27 2010-12-29 Horst Dittmann Appareil de stimulation électrique pour plusieurs utilisateurs
CN105125172A (zh) * 2015-06-24 2015-12-09 广州三瑞医疗器械有限公司 基于面部图像识别的镇痛控制方法及其装置
CN105125172B (zh) * 2015-06-24 2019-03-22 广州三瑞医疗器械有限公司 基于面部图像识别的镇痛控制方法及其装置

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