WO2001003574A1 - Reusable pulse oximeter probe with disposable liner - Google Patents

Reusable pulse oximeter probe with disposable liner Download PDF

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Publication number
WO2001003574A1
WO2001003574A1 PCT/US2000/016304 US0016304W WO0103574A1 WO 2001003574 A1 WO2001003574 A1 WO 2001003574A1 US 0016304 W US0016304 W US 0016304W WO 0103574 A1 WO0103574 A1 WO 0103574A1
Authority
WO
WIPO (PCT)
Prior art keywords
disposable
foam
pulse oximeter
strip
modular
Prior art date
Application number
PCT/US2000/016304
Other languages
French (fr)
Inventor
Brent Parker
Original Assignee
Sensidyne, Inc.
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
Application filed by Sensidyne, Inc. filed Critical Sensidyne, Inc.
Priority to AU60486/00A priority Critical patent/AU6048600A/en
Publication of WO2001003574A1 publication Critical patent/WO2001003574A1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/1455—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters
    • A61B5/14551—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters for measuring blood gases
    • A61B5/14552—Details of sensors specially adapted therefor

Definitions

  • the present invention relates to a method of making and affixing a reusable finger probe to a patient by means of a finger clip apparatus with a disposable liner insert so that there is no contact between the costly, reusable portion of the probe and the patient.
  • the contaminated liner which is relatively inexpensive, can then be discarded after single patient use and the probe and finger clip can be re-used with a new liner.
  • Such disposable inserts may be provided of different sizes and would greatly enhance the fit and function of the finger clip on the patient. This is important for several reasons. Firstly, a fitted finger clip would be much more comfortable to wear than conventional finger clips. Secondly, a fitted finger clip would allow the transmission and reception of infrared light from the LEDs of the probe without interference from extraneous light sources around the front and edges of the finger, and thirdly, a fitted finger clip would evenly distribute the pressure from the spring of the finger clip and would be much less likely to restrict blood flow to the digit and thereby cause erroneous oxygen saturation readings.
  • the present invention not only solves the problems outlined above, but offers an alternative that is cheap to manufacture and easy to use.
  • the present invention is a method for improving the reusability, fit, and cleanliness of a reusable pulse oximeter fmger sensor. It comprises a reusable pulse oximeter probe with at least one light emitting diode and one photocell detector wherein said emitter and detector are mounted in respective fmger clip housing arms having apertures therein, one housing arm having an aperture aligned with said emitter, and the other housing arm having an aperture aligned with said detector.
  • a T-shaped channel or slot with a locking protrusion or detent at the entrance of each of the channels.
  • a disposable foam liner which is an initially, substantially planar, foam strip, having plastic backing on at least a part thereof and two T-shaped protrusions mounted in the lateral plane of said plastic backing. At opposing ends of the foam strip, and incorporated into the T-shaped protrusions, are notched levers for locking the foam strip into position in the T-shaped channel of the finger clip.
  • the plastic backing is of a thickness that will allow it to bend into a "U" shape for insertion into the fmger clip.
  • the plastic backing may be entirely absent and the inherent flexibility of the foam itself will allow it to bend into the desired shape.
  • the foam strip contains two apertures located centrally therein containing silicone windows, or windows of another radiation transparent material, that will allow for the transmission and reception of infrared light. Additionally, the foam may also contain an adhesive for helping to adhere the fmger clip to the patient.
  • the fmger clip may be of scaled down design and would allow for the insertion of different sizes of molded foam that would conform in size to the digit on which the fmger clip is to be used.
  • the foam itself would be intended to substantially envelop the finger and the fmger clip would be a mechanism for pinching or biasing the two foam halves together.
  • Figure 1 is an exploded view of a standard pulse oximeter probe and finger clip with disposable liner ;
  • Figure 2 is an exploded view of the preferred embodiment of the invention incorporating two disposable liners having finger conformance. Description of the Reusable Pulse Oximeter Probe
  • the Reusable Pulse Oximeter Sensor constitutes a fmger clip style pulse oximeter probe shown as Figure 1 , Item A.
  • the probe incorporates two plastic housing arms, each housing arm containing apertures therein, said apertures shown as Figure 1, Items C.
  • One housing (HAE) contains the light emitting diode of the probe, and the other (HAD) contains the photocell detector.
  • the emitter and detectors are aligned with the apertures of said housings in order to transmit and receive light through a human appendage.
  • the housings are held together by a pin incorporating a spring, Figure 1, item B, which inclines the two housings toward each other and clamps the apparatus on a human digit.
  • each housing Within each housing is a "T" shaped channel , Figure 1, item D, with a locking notch at the entrance thereof, said notch shown as Figure 1 , items E.
  • the channel and notch is to slidably engage the disposable liner of the fmger clip and to lock it into its appropriate position within the finger clip.
  • the probe is attached to a pulse oximeter through a connector, Figure 1, item K.
  • the above description constitutes the Reusable Pulse Oximeter Probe component of the invention.
  • the components of the disposable liner or shield include an initially planar foam strip shown as Figure 1 , item F, incorporating two apertures, centrally located within the strip, and shown as Figure 1, Items I, Each aperture has a diameter sufficient in size to accommodate the transmission and reception of light from a light emitting diode and photocell detector of the reusable pulse oximeter probe. Each aperture has a silicone window, or window of another material, which will allow for the transmission and reception of infrared light therethrough.
  • the foam liners there are two disposable foam liners, with finger-shaped indentations therein, said indentations varying in size depending on the size of the patient's digit on which they are intended to be used.
  • the foam liners, Figure 2, items F have a plastic backing, Figure 2, items G.
  • the plastic backings have "T' shaped protrusions mounted thereon, Figure 2, items H, which slidably engage the "T" shaped channel of the fmger clip, Figure 2, items D, the locking levers, Figure 2, items J, engaging the locking notches of the finger clip, Figure 2, items E, and securing the foam into place.
  • Other Fastening Means
  • Disposable Liner or Shield there are many ways of attaching the Disposable Liner or Shield to the Reusable Pulse Oximeter Probe.
  • the above description describes attachment of the Disposable Liner to the Reusable Pulse Oximeter Probe by way of a modular type sliding connector.
  • a number of other methods may be used including, hook and loop material, snap-on connectors, and removable adhesive.

Abstract

A reusable pulse oximeter sensor, and disposable liner, includes a reusable pulse oximeter probe assembly (A) having at least one light emitting diode (HAE), one photocell detector (HAD) wherein the detector, the emitter are mounted in plastic finger clip housing arms (D), and at least one disposable foam strip (F) having an aperture or apertures (I) therein. The foam strip or strips have modular receptacles (J) that can mate, and removably engage the finger clip housing arms (D), further aligning the apertures with the emitter, and detector to allow transmission of light through the appendage of a patient when attached to the patient.

Description

Reusable Pulse Oximeter Probe with Disposable Liner
Background of the Invention
Heretofore the use of pulse oximeter finger probes has been limited to the use of a costly reusable probe, which is available in only one size, and is contaminated by use on a patient, or cheaper, single-use probes, which, in the aggregate, amount to a considerable expenditure for a health care institution. The present invention relates to a method of making and affixing a reusable finger probe to a patient by means of a finger clip apparatus with a disposable liner insert so that there is no contact between the costly, reusable portion of the probe and the patient. The contaminated liner, which is relatively inexpensive, can then be discarded after single patient use and the probe and finger clip can be re-used with a new liner. Additionally, such disposable inserts may be provided of different sizes and would greatly enhance the fit and function of the finger clip on the patient. This is important for several reasons. Firstly, a fitted finger clip would be much more comfortable to wear than conventional finger clips. Secondly, a fitted finger clip would allow the transmission and reception of infrared light from the LEDs of the probe without interference from extraneous light sources around the front and edges of the finger, and thirdly, a fitted finger clip would evenly distribute the pressure from the spring of the finger clip and would be much less likely to restrict blood flow to the digit and thereby cause erroneous oxygen saturation readings.
The Present Invention
The present invention not only solves the problems outlined above, but offers an alternative that is cheap to manufacture and easy to use.
In detail, the present invention is a method for improving the reusability, fit, and cleanliness of a reusable pulse oximeter fmger sensor. It comprises a reusable pulse oximeter probe with at least one light emitting diode and one photocell detector wherein said emitter and detector are mounted in respective fmger clip housing arms having apertures therein, one housing arm having an aperture aligned with said emitter, and the other housing arm having an aperture aligned with said detector.
Incorporated into each opposing side of the finger clip is a T-shaped channel or slot with a locking protrusion or detent at the entrance of each of the channels. Also included is a disposable foam liner which is an initially, substantially planar, foam strip, having plastic backing on at least a part thereof and two T-shaped protrusions mounted in the lateral plane of said plastic backing. At opposing ends of the foam strip, and incorporated into the T-shaped protrusions, are notched levers for locking the foam strip into position in the T-shaped channel of the finger clip. In the center of the foam strip, the plastic backing is of a thickness that will allow it to bend into a "U" shape for insertion into the fmger clip. Alternatively, the plastic backing may be entirely absent and the inherent flexibility of the foam itself will allow it to bend into the desired shape. Additionally, the foam strip contains two apertures located centrally therein containing silicone windows, or windows of another radiation transparent material, that will allow for the transmission and reception of infrared light. Additionally, the foam may also contain an adhesive for helping to adhere the fmger clip to the patient.
Finally, and in a preferred embodiment of the invention, the fmger clip may be of scaled down design and would allow for the insertion of different sizes of molded foam that would conform in size to the digit on which the fmger clip is to be used. In such an application, the foam itself would be intended to substantially envelop the finger and the fmger clip would be a mechanism for pinching or biasing the two foam halves together.
Description of the Drawings
The above and other advantages of the invention will become more clear when considered with the following specifications and accompanying drawings wherein:
Figure 1 is an exploded view of a standard pulse oximeter probe and finger clip with disposable liner ; and
Figure 2 is an exploded view of the preferred embodiment of the invention incorporating two disposable liners having finger conformance. Description of the Reusable Pulse Oximeter Probe
The Reusable Pulse Oximeter Sensor constitutes a fmger clip style pulse oximeter probe shown as Figure 1 , Item A. The probe incorporates two plastic housing arms, each housing arm containing apertures therein, said apertures shown as Figure 1, Items C. One housing (HAE) contains the light emitting diode of the probe, and the other (HAD) contains the photocell detector. The emitter and detectors are aligned with the apertures of said housings in order to transmit and receive light through a human appendage. The housings are held together by a pin incorporating a spring, Figure 1, item B, which inclines the two housings toward each other and clamps the apparatus on a human digit.
Within each housing is a "T" shaped channel , Figure 1, item D, with a locking notch at the entrance thereof, said notch shown as Figure 1 , items E. The purpose of
the channel and notch is to slidably engage the disposable liner of the fmger clip and to lock it into its appropriate position within the finger clip. The probe is attached to a pulse oximeter through a connector, Figure 1, item K. The above description constitutes the Reusable Pulse Oximeter Probe component of the invention.
Description of the Disposable Liner or Shield
The components of the disposable liner or shield include an initially planar foam strip shown as Figure 1 , item F, incorporating two apertures, centrally located within the strip, and shown as Figure 1, Items I, Each aperture has a diameter sufficient in size to accommodate the transmission and reception of light from a light emitting diode and photocell detector of the reusable pulse oximeter probe. Each aperture has a silicone window, or window of another material, which will allow for the transmission and reception of infrared light therethrough.
On either end of the foam strip there is a thin plastic backing, Figure 1 , items G, having a "T" shaped protrusion mounted in the lateral plane thereof and shown as Figure 1, item H. The purpose of the "T" shaped protrusion is to slidably engage the "T" shaped channel of the reusable sensor, Figure 1, item D, and to lock into place by means of the locking levers, Figure 1, items J, a releasable detent.
In the preferred embodiment of the invention, there are two disposable foam liners, with finger-shaped indentations therein, said indentations varying in size depending on the size of the patient's digit on which they are intended to be used. In this embodiment, the foam liners, Figure 2, items F, have a plastic backing, Figure 2, items G. The plastic backings have "T' shaped protrusions mounted thereon, Figure 2, items H, which slidably engage the "T" shaped channel of the fmger clip, Figure 2, items D, the locking levers, Figure 2, items J, engaging the locking notches of the finger clip, Figure 2, items E, and securing the foam into place. Other Fastening Means
As can be appreciated there are many ways of attaching the Disposable Liner or Shield to the Reusable Pulse Oximeter Probe. The above description describes attachment of the Disposable Liner to the Reusable Pulse Oximeter Probe by way of a modular type sliding connector. In addition to this means a number of other methods may be used including, hook and loop material, snap-on connectors, and removable adhesive.

Claims

What is claimed is:
1. A reusable pulse oximeter sensor and disposable liner, comprising: a) a reusable pulse oximeter probe assembly including at least one light emitting diode and one photocell detector wherein said detector and emitter are mounted in plastic finger clip housing arms; b) at least one disposable foam strip having an aperture or apertures therein; wherein said foam strip or strips can matedly and removably engage said fingerclip housing arms and transmit and receive light through the apertures of said foam strip or strips and through the appendage of a patient.
2. A reusable pulse oximeter fmger clip assembly having means for matedly and removably engaging a disposable foam liner.
3. The pulse oximeter finger clip of claim 2 wherein said disposable foam liner mating and removal means comprises a modular channel with locking notch.
4. A foam strip or strips, said strip or strips having means for matedly and removably engaging a reusable pulse oximeter finger clip.
5. The foam liner of claim 4 wherein said strip or strips incorporate a modular connector and locking lever for removably engaging a reusable pulse oiximeter probe.
6. A disposable liner for use with a reusable pulse oximeter probe assembly including at least one light emitting diode and one photocell detector wherein said detector and emitter are mounted in plastic finger clip housing arms, said disposable liner comprising: a disposable adhesive bandage including a disposable foam strip having a pair of apertures therein and modular receptacles carried on said foam strip, one over each aperture, respectively, wherein said modular receptacles can matedly and removably engage respective ones of said fingerclip housing arms and transmit and receive light through the apertures of said foam strip and through an appendage of a patient.
7. The disposable bandage defined in claim 6 wherein said modular receptacle includes a channel with a locking member .
8. A foam liner strip for use in oximetry, said foam liner strip having adhesive on one side for attachment to an appendage of a patient and modular receptacles for matedly and removably engaging a reusable pulse oximeter probe emitting diode and photocell detector, respectively.
9. The foam liner of claim 8 wherein said foam strip incorporates a modular connector and locking lever for removably engaging said reusable pulse oximeter probe light emitting diode and photocell detector, respectively. AMENDED CLAIMS
[received by the International Bureau on 4 December 2000 (04.12.00); original claims 1-9 replaced by new claims 1-6 (2 pages)]
1. A disposable liner for use with a reusable pulse oximeter probe assembly including at least one light emitting diode and one photocell detector wherein said detector and emitter are mounted in plastic finger clip housing arms, said disposable liner comprising: a disposable adhesive bandage including a disposable foam strip having a pair of apertures therein and modular receptacles carried on said foam strip, one over each aperture, respectively, wherein said modular receptacles can matedly and removably receive respective ones of said finger clip housing arms and transmit and receive light through the apertures of said foam strip and through an appendage of a patient.
2. The disposable bandage defined in claim 1 wherein said modular receptacle includes a channel with a locking membe .
3- A foam liner strip for use in oxi etry, said foam liner strip having adhesive on one side for attachment to an appendage of a patient and a pair of modular female receptacle sockets for matedly and removably engaging a reusable modular pulse oximeter probe emitting diode and a reusable pulse oximeter probe photocell detector, respectively.
4. The foam liner of claim 3 wherein each of said modular female receptacle sockets incorporates a locking lever for removably engaging said modular reusable pulse oximeter probe light emitting diode and photocell detector, respectively.
5- In a spring clip oximeter probe having an emitter housing arm and a sensor housing arm which are biased towards each other at a predetermined pressure to grasp a portion of a living human body through which blood flows, an oximeter emitter mounted in said emitter housing arm to emit radiation into said portion of the living body and a radiation sensor mounted in said sensor housing arm for sensing radiation which passes through said portion of a living body, the improvement comprising a disposable safety shield detachably mounted on each of said housing arms, said safety shield having a radiation transparent window means isolating said emitter and sensor from said living body.
6. The probe defined in Claim 5 wherein each housing arm has a slot juxtaposed at the sides of said emitter and sensor, respectively, and said disposable shield having a slot engaging member at the respective ends thereof for receiving an end of said shield.
PCT/US2000/016304 1999-07-13 2000-07-07 Reusable pulse oximeter probe with disposable liner WO2001003574A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU60486/00A AU6048600A (en) 1999-07-13 2000-07-07 Reusable pulse oximeter probe with disposable liner

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/352,144 1999-07-13
US09/352,144 US6321100B1 (en) 1999-07-13 1999-07-13 Reusable pulse oximeter probe with disposable liner

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WO2001003574A1 true WO2001003574A1 (en) 2001-01-18

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