WO1999007279A1 - Dispositif de test de nerfs - Google Patents

Dispositif de test de nerfs Download PDF

Info

Publication number
WO1999007279A1
WO1999007279A1 PCT/GB1998/002390 GB9802390W WO9907279A1 WO 1999007279 A1 WO1999007279 A1 WO 1999007279A1 GB 9802390 W GB9802390 W GB 9802390W WO 9907279 A1 WO9907279 A1 WO 9907279A1
Authority
WO
WIPO (PCT)
Prior art keywords
barrel
testing device
nerve testing
filament
nerve
Prior art date
Application number
PCT/GB1998/002390
Other languages
English (en)
Inventor
Steven Mark Guy Rolfe
Original Assignee
Owen Mumford Limited
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 Owen Mumford Limited filed Critical Owen Mumford Limited
Publication of WO1999007279A1 publication Critical patent/WO1999007279A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/48—Other medical applications
    • A61B5/4824—Touch or pain perception evaluation
    • 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
    • A61B5/4827—Touch or pain perception evaluation assessing touch sensitivity, e.g. for evaluation of pain threshold

Definitions

  • This invention relates to nerve testing devices.
  • a standard test involves pressing the end of a filament against the skin of a patient. Depending on the length and thickness of the filament, it will remain straight until a certain force is exerted, and then it will buckle. If there is no reaction to the point pressure up to this buckling, then the doctor will know that the local nerves have lost a certain amount of sensitivity.
  • the usual implement for carrying out this test consists simply of a bar from one end of which projects a filament.
  • the doctor holds the bar and presses the end of the filament against the patient's skin.
  • the filament is of fixed length and thickness, and its buckling point occurs at a predeter- mined applied force. If the doctor wishes to test for a different level of sensitivity, then a different implement has to be found and applied.
  • a nerve testing device comprising a barrel, a body adjustable longitudinally within the barrel, and a filament carried by the body to project from one, forward end of the barrel by controllable amounts.
  • the filament preferably emerges from the forward end of the barrel through an aperture in which it is a close fit. It will therefore be fully supported up to the point where it is exposed.
  • the body and barrel have longitudinal slot and stud interengagement to limit the scope of adjustment, and preferably the slot is in the barrel and the stud on the body.
  • the stud may be on a resilient portion of the body enabling disengagement of the stud from the slot and separation of the body from the barrel. This allows the filament to replaceable, which may be necessary if it becomes contaminated, if it is bent to a non-recoverable position, or if a filament with different characteristics is required.
  • a replacement filament may be on a carrier that fits to the body and which has indicia to show through a window in the barrel to indicate the end-on force required to buckle the projecting filament. Elements of different stiffness may be used and so each can come with its own calibration.
  • the barrel and the body have mutually engageable detents whereby the body can be located at predetermined positions to project the filament by a selected amount.
  • detents may be provided by the stud and lateral deformations of the slot in which the stud can locate .
  • the body telescopes into the other, rear end of the barrel, leaving an exposed rear end portion, which can have a clip for retention of the device in a pocket .
  • the rear end portion of the body may also have a socket to receive a spring- loaded nerve testing element with a projecting tip which, in use, is pressed against a patient and forced to retract against the spring.
  • the nerve testing element is preferably removable and reversible and has different tips at opposite ends, either of which tips can be made the projecting one. It may be a small lancet -like element such as that sold under our Trade Mark NEUROTIP. This has a sharp tip at one end, initially shielded by a break-away cap, and a blunt finger at the other end. The tip of the filament may be dimensioned somewhere between these two.
  • the body With the body removable from the barrel and the nerve testing element removable from the socket, the body can be adapted to provide a storage location for the nerve testing element when that is not required. Preferably, it is in the portion normally concealed within the barrel.
  • the element is taken out and entered in the socket, conveniently fitting a spring-loaded carrier retained by pin and slot engagement with said body. If the slot is in the body and the pin is on the carrier, the pin can be visible in the slot, which forms a gauge showing the amount of retraction and thus the force applied.
  • Figure 1 is a side view of a nerve testing device in an out-of-use state
  • Figure 2 is a side view, in the direction A of Figure 1, of the out-of-use device,
  • Figure 3 is an axial section of the device in that state
  • Figure 4 is a side view of a filament carrying body forming part of the device with the filament being withdrawn
  • Figure 5 is a side view in the direction B of Figure 4 showing the filament fully in place
  • Figure 6 is a side view, from the direction opposite A, of the device in a ready-to-use state.
  • the device has a barrel 1 and a filament carrying body 2 whose forward end portion 3 telescopes into the rear end of the barrel.
  • This portion 3 is bifurcated into a long arm 4 and a short arm 5, there being an enlargement 6 of the space between them near the root .
  • the free end of the long arm 4 develops into a nose 7 similar in shape to the top of a -bottle. From the base of this nose a short finger 8 extends back almost to the free end of the short arm 5, which terminates with an outwardly projecting stud 9.
  • the body 2 is of moulded plastics construction and the arms can flex, being shown in their relaxed condition in Figure 4.
  • the barrel tapers at its forward end and through that there is a narrow passage 14 in which the filament 13 is a close fit. Filaments may be changed and some may be thinner than others. However, the difference between fattest and thinnest will be small (a typical range may be diameters of 0.48 to 0.50 mm), and so there will be negligible scope for the thinner filaments to deform within the passage 14 : they will all be well supported until they emerge from the barrel .
  • the rear end of the barrel 1 is fully open and the portion 3 is a close sliding fit in the rest of the barrel.
  • a longitudinal slot 15 extends from near the rear end of the barrel to a point shortly before the taper begins, and the stud 9 engages in this to limit the telescopic movement.
  • the body 2 can be separated from the barrel 1 by squeezing the arm 5 to the Figure 3 position, this being done when the cap 12 with its filament 13 is to be changed for example.
  • detent 16 At an intermediate point along the slot 15 there is a pair of opposed detents 16 in which the stud 9 can locate, thus projecting the filament 13 by one predetermined amount. There could be more of these detents.
  • the detent 16a at the rear end is substantially larger so that the barrel 1 and body 2 can be mutually twisted and held by the stud 9 in the filament retracted position.
  • the rear end of the body 2 has an integrally moulded clip 17, so that the device can be held in a pocket like a pen. It also has a deep socket 18 open to this rear end, housing a coil spring 19 and a carrier 20. The movement of this carrier is limited by a pin 21 which travels in a slot 22, this having a notch 23 at its halfway point which acts as a gauge of how much the carrier 20 is retracted against the force of the spring 19. This will typically be 40gms, and be greater than the force required to buckle the filament 13.
  • the open end of the socket 18 receives a sensing element 24. It is like a lancet for a skin pricker, having a needle 25 at one end, its sharp tip initially being shielded by a break-off cap 26. At the other end it has a finger 27 considerably thicker than the needle 25 and the filament 13 and with a rounded end.
  • the element 24 is reversible and can be set so that either the needle 25 or the finger 27 projects. Whichever one is selected can be pressed against the skin of a patient, whose reaction is noted when the pin 21 reaches the notch 23. There could be more marks or notches along the slot 22, for different applied forces.
  • the element 24 can be housed between the arms 4 and 5, with the cap 26 in the enlargement 6 as shown in Figure 1.
  • the arms are further reduced at 28 as best seen in Figure 2 so that the cap 26 is accessible and can be pressed out sideways, .
  • the barrel 1 and body 2 are closed up from the
  • Figure 1 position until the filament 13 projects by the desired amount.
  • the barrel 1 is shown fully retracted, in which state the number '10' on the finger 11 appears in a window 29 in the barrel 1, indicating that the filament will buckle with a lOgm. force applied endwise.
  • the filament 13 is then applied against the patient's skin and the patient's reaction noted.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Pain & Pain Management (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Psychiatry (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Hospice & Palliative Care (AREA)
  • Biomedical Technology (AREA)
  • Physics & Mathematics (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

L'invention concerne un dispositif de test de nerfs formé d'un article en forme de stylo comportant un magasin (1) et un corps (2) s'insérant dans son extrémité arrière où il est retenu amovible. Un filament (13) est ajusté dans l'extrémité avant du corps (2) et peut se projeter par segments variables dans un passage étroit (14) à l'extrémité avant du magasin (1). On teste la sensibilité d'un nerf en appliquant à l'extrémité le filament (13) qui flambe plus facilement à mesure qu'il se projette. Le corps (2) peut également comporter un élément de test de nerf supplémentaire (24) dans une douille (18) située à son extrémité arrière. Une pointe (25, 27) se projette et est poussée en arrière contre un ressort (19) se trouvant dans la douille (18). L'élément (24) peut être réversible avec deux pointes différentes (25, 27), et s'il n'est pas utilisé, peut être logé dans la partie du corps (2) s'insérant dans le magasin (1).
PCT/GB1998/002390 1997-08-09 1998-08-07 Dispositif de test de nerfs WO1999007279A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9716924.7A GB9716924D0 (en) 1997-08-09 1997-08-09 Improvements relating to nerve testing devices
GB9716924.7 1997-08-09

Publications (1)

Publication Number Publication Date
WO1999007279A1 true WO1999007279A1 (fr) 1999-02-18

Family

ID=10817280

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1998/002390 WO1999007279A1 (fr) 1997-08-09 1998-08-07 Dispositif de test de nerfs

Country Status (2)

Country Link
GB (1) GB9716924D0 (fr)
WO (1) WO1999007279A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2384989A (en) * 2001-11-10 2003-08-13 Steven Edward Bradshaw Multipurpose neurological examination tool
WO2005006982A1 (fr) * 2003-07-10 2005-01-27 Johannes Gutenberg-Universität Dispositif servant a induire des stimuli n'entrainant pas de dommage tissulaire, pour verifier une sensation de douleur induite mecaniquement chez un sujet d'experience
WO2007053074A1 (fr) * 2005-11-01 2007-05-10 Rhinomed Ab Appareil de test sensoriel
USD914208S1 (en) 2019-06-14 2021-03-23 Owen Mumford Limited Syringe component
USD938022S1 (en) 2016-08-10 2021-12-07 Owen Mumford Limited Safety pen needle
USD952136S1 (en) 2019-06-14 2022-05-17 Owen Mumford Limited Syringe
USD959651S1 (en) 2020-04-08 2022-08-02 Owen Mumford Limited Medical instrument
USD972745S1 (en) 2020-05-07 2022-12-13 Owen Mumford Limited Testing device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2704539A (en) * 1952-10-28 1955-03-22 Frank B Smith Skin sensitivity detector
US3662744A (en) * 1970-12-02 1972-05-16 Nasa Method for measuring cutaneous sensory perception
GB2206791A (en) * 1987-07-17 1989-01-18 Dr Kevin Gordon Kelly Diagnostic instrument

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2704539A (en) * 1952-10-28 1955-03-22 Frank B Smith Skin sensitivity detector
US3662744A (en) * 1970-12-02 1972-05-16 Nasa Method for measuring cutaneous sensory perception
GB2206791A (en) * 1987-07-17 1989-01-18 Dr Kevin Gordon Kelly Diagnostic instrument

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2384989A (en) * 2001-11-10 2003-08-13 Steven Edward Bradshaw Multipurpose neurological examination tool
WO2005006982A1 (fr) * 2003-07-10 2005-01-27 Johannes Gutenberg-Universität Dispositif servant a induire des stimuli n'entrainant pas de dommage tissulaire, pour verifier une sensation de douleur induite mecaniquement chez un sujet d'experience
WO2007053074A1 (fr) * 2005-11-01 2007-05-10 Rhinomed Ab Appareil de test sensoriel
USD938022S1 (en) 2016-08-10 2021-12-07 Owen Mumford Limited Safety pen needle
USD959654S1 (en) 2016-08-10 2022-08-02 Owen Mumford Limited Safety pen needle
USD914208S1 (en) 2019-06-14 2021-03-23 Owen Mumford Limited Syringe component
USD952136S1 (en) 2019-06-14 2022-05-17 Owen Mumford Limited Syringe
USD959651S1 (en) 2020-04-08 2022-08-02 Owen Mumford Limited Medical instrument
USD972745S1 (en) 2020-05-07 2022-12-13 Owen Mumford Limited Testing device

Also Published As

Publication number Publication date
GB9716924D0 (en) 1997-10-15

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