Pulse Oximetry Grip Sensor and Method of Making Same

• US 20080262328A1
• Filed: 01/23/2006
• Published: 10/23/2008
• Est. Priority Date: 01/21/2005
• Status: Abandoned Application

• Current Assignee: Medrad Incorporated (Bayer AG)
• Original Assignee: Medrad Incorporated (Bayer AG)
• Inventors: Adams, Bradley
• Application Number:
  US11/814,496
• Publication Number:
  US 20080262328A1
• Time in Patent Office: Days
• US Class Current: 600/344
• CPC Class Codes: A61B 2562/12 Manufacturing methods specially adapted for producing sensors for in-vivo measurements
• CPC Class Codes: A61B 5/14552 Details of sensors specially adapted therefor

Abstract

A probe for use with a pulse oximeter apparatus is disclosed, as are a fixture for and a method of making the probe. The probe includes a housing and two fiber optic bundles. The first bundle has an emitter portion at one end, and is used for conducting light from a source thereof to the emitter portion from which the light is transmitted for transillumination through a body part. The second bundle is for conducting the transilluminated light incident upon a detector portion thereof to the pulse oximeter apparatus. The housing is overmolded onto the bundles so that the emitter and detector portions are securely positioned diametrically opposite each other across an opening defined by the housing. The overmolding makes the alignment of the emitter and detector portions largely impervious to movement of the body part when placed within the opening and thus between the emitter and detector portions.

Claims

1. A probe for use with a pulse oximeter apparatus, the probe comprising:

(a) a first fiber optic bundle having an emitter portion at one end thereof, said first fiber optic bundle for conducting light from a source thereof to said emitter portion from which the light is transmitted for transillumination through a body part;

(b) a second fiber optic bundle having a detector portion at one end thereof, said second fiber optic bundle for conducting the transilluminated light incident upon said detector portion to said pulse oximeter apparatus; and

(c) a housing wherein said emitter and said detector portions of said first and said second fiber optic bundles, respectively, are overmolded so that said emitter and said detector portions are securely positioned diametrically opposite each other across an opening defined by said housing thereby making an alignment of said emitter and said detector portions largely impervious to movement of the body part when placed within said opening of said housing and thus between said emitter and said detector portions therein.

2. The probe claimed in claim 1 wherein said emitter and said detector portions are securely positioned diametrically opposite each other a predetermined distance apart, with said predetermined distance being dependent upon at least a size of said insert member.

3. The probe claimed in claim 1 wherein said emitter and said detector portions are securely positioned diametrically opposite each other a predetermined distance apart, with said predetermined distance being dependent upon at least a size of the body part.

4. The probe claimed in claim 1 wherein the body part said opening is shaped to accommodate includes at least one of a finger, an earlobe, and a nose.

5. The probe claimed in claim 1 wherein said housing is made of a flexible material.

6. A fixture for making a probe for a pulse oximeter apparatus, the fixture comprising:

(a) a base member;

(b) an opposing member; and

(c) an insert member for placement between said base and said opposing members and therewith defining a cavity of predetermined shape wherein a housing of the probe is formable via introduction of a flowable material therein via at least one conduit defined by at least one of said members, said members further defining two channels for holding first and second fiber optic bundles, respectively, as said housing is overmolded thereabout so that an emitter portion of said first fiber optic bundle and a detector portion of said second fiber optic bundle are securely positioned diametrically opposite each other across an opening defined by said housing thereby making an alignment of said emitter and said detector portions largely impervious to movement of a body part when the body part is positioned within said opening of said housing and thus between said emitter and said detector portions therein during use of the probe.

7. The fixture claimed in claim 6 wherein said emitter and said detector portions are securely positioned diametrically opposite each other a predetermined distance apart, with said predetermined distance being dependent upon at least a size of said insert member.

8. The fixture claimed in claim 6 wherein said emitter and said detector portions are securely positioned diametrically opposite each other a predetermined distance apart, with said predetermined distance being dependent upon at least a size of the body part.

9. The fixture claimed in claim 6 wherein:

(a) said base member of said mold is adapted for connection to a stationary platen of a molding system; and

(b) said opposing member of said mold is adapted for connection to a movable platen of said molding system;

with said molding system enabling said movable platen to close upon said insert member situated on said base member so that said members are pressed tightly together as the flowable material is introduced into said cavity to form said housing therein.

10. The fixture claimed in claim 6 wherein the body part said opening is shaped to accommodate includes at least one of a finger, an earlobe, and a nose.

11. The fixture claimed in claim 6 wherein the flowable material of said housing is flexible upon curing.

12. A method of making a probe for use with a pulse oximeter apparatus, the method comprising the steps of:

(a) positioning a pair of fiber optic bundles on an insert member of a mold so that an emitter portion of a first of said fiber optic bundles and a detector portion of a second of said fiber optic bundles are positioned diametrically opposite each other a predetermined distance apart;

(b) placing said insert member on which said emitter and said detector portions of said fiber optic bundles have been positioned upon a base member of said mold;

(c) placing an opposing member of said mold onto said insert member, with said base, said insert and said opposing members together defining a cavity of predetermined shape wherein a housing of said probe is formable via introduction of a flowable material therein; and

(d) introducing the flowable material into said cavity thereby overmolding said fiber optic bundles therein and forming said housing thereabout so that said emitter portion and said detector portion are securely positioned diametrically opposite each other across an opening defined by said housing so that an alignment of said emitter and said detector portions is made largely impervious to movement of a body part when the body part is positioned within said opening of said housing during use of the probe.

13. The method claimed in claim 12 wherein said predetermined distance is dependent upon at least a size of said insert member.

14. The method claimed in claim 12 wherein said predetermined distance is dependent upon at least a size of the body part.

15. The method claimed in claim 12 wherein the flowable material is introduced into said cavity via at least one conduit defined by at least one of said base member, said insert member and said opposing member.

16. The method claimed in claim 12 wherein the body part said housing is shaped to accommodate includes at least one of a finger, an earlobe, and a nose.

17. The method claimed in claim 12 wherein the flowable material of said housing is flexible upon curing.

18. A method of making a probe for use with a pulse oximeter apparatus, the method comprising the steps of:

(a) attaching a base member of a mold to a stationary platen of a molding system;

(b) attaching an opposing member of said mold to a movable platen of said molding system;

(c) positioning a pair of fiber optic bundles on an insert member of said mold so that an emitter portion of a first of said fiber optic bundles and a detector portion of a second of said fiber optic bundles are positioned diametrically opposite each other a predetermined distance apart;

(d) placing said insert member on which said emitter and said detector portions of said fiber optic bundles have been positioned upon said base member of said mold;

(e) pressing said opposing member onto said insert member via said movable and said stationary platens with said base, said insert and said opposing members together defining a cavity of predetermined shape wherein a housing of said probe is formable via introduction of a flowable material therein; and

(f) introducing the flowable material into said cavity thereby overmolding said fiber optic bundles therein and forming said housing thereabout so that said emitter portion and said detector portion are securely positioned diametrically opposite each other across an opening defined by said housing so that an alignment of said emitter and said detector portions is made largely impervious to movement of a body part when the body part is positioned within said opening and thus between said emitter and said detector portions therein during use of the probe.

19. The method claimed in claim 18 wherein said predetermined distance is dependent upon at least a size of said insert member.

20. The method claimed in claim 18 wherein said predetermined distance is dependent upon at least a size of the body part.

21. The method claimed in claim 18 wherein the flowable material is introduced into said cavity via at least one conduit defined by at least one of said base member, said insert member and said opposing member.

22. The method claimed in claim 18 wherein the body part said housing is shaped to accommodate includes at least one of a finger, an earlobe, and a nose.

23. The method claimed in claim 18 wherein the flowable material of said housing is flexible upon curing.

24. A probe for use with a pulse oximeter apparatus, the probe comprising:

(a) a first fiber optic bundle having an emitter portion at one end thereof, said first fiber optic bundle for conducting light from a source thereof to said emitter portion from which the light is transmitted for transillumination through a body part;

(b) a second fiber optic bundle having a detector portion at one end thereof, said second fiber optic bundle for conducting the transilluminated light incident upon said detector portion to said pulse oximeter apparatus;

(c) an emitter subhousing into which said emitter portion of said first fiber optic bundle is inserted;

(d) a detector subhousing into which said detector portion of said second fiber optic bundle is inserted; and

(e) a housing wherein said emitter and said detector subhousings are overmolded so that said emitter and said detector portions inserted therein, respectively, are securely positioned diametrically opposite each other across an opening defined by said housing thereby making an alignment of said emitter and said detector portions largely impervious to movement of the body part when placed within said opening and between said emitter and said detector portions therein.

25. A fixture for making a probe for a pulse oximeter apparatus, the fixture comprising:

(a) a base member;

(b) an opposing member; and

(c) an insert member for placement between said base and said opposing members and therewith defining a cavity of predetermined shape wherein a housing of the probe is formable via introduction of a flowable material therein via at least one conduit defined by at least one of said members, said members further defining two channels for holding first and second fiber optic bundles, respectively, as said housing is overmolded about both an emitter subhousing and a detector subhousing into which an emitter portion of said first fiber optic bundle and a detector portion of said second fiber optic bundle have been respectively inserted so that said emitter and said detector portions are securely positioned diametrically opposite each other across an opening defined by said housing thereby making an alignment of said emitter and said detector portions largely impervious to movement of a body part when the body part is positioned within said opening and between said emitter and said detector portions therein during use of the probe.

26. A method of making a probe for use with a pulse oximeter apparatus, the method comprising the steps of:

(a) inserting an emitter portion of a first fiber optic bundle into an emitter subhousing;

(b) inserting a detector portion of a second fiber optic bundle into a detector subhousing;

(c) positioning said emitter and said detector subhousings on an insert member of a mold so that said emitter portion of said first fiber optic bundle and said detector portion of said second fiber optic bundle are positioned diametrically opposite each other a predetermined distance apart;

(d) placing said insert member on which said emitter and said detector subhousings have been positioned upon a base member of said mold;

(e) placing an opposing member of said mold onto said insert member, with said base, said insert and said opposing members together defining a cavity of predetermined shape wherein a housing of said probe is formable via introduction of a flowable material therein; and

(f) introducing the flowable material into said cavity to at least partially overmold said emitter and said detector subhousings therein thereby forming said housing thereabout so that said emitter and said detector portions are securely positioned diametrically opposite each other across an opening defined by said housing so that an alignment of said emitter and said detector portions is made largely impervious to movement of a body part when the body part is positioned within said opening of said housing during use of the probe.

27. A method of making a probe for use with a pulse oximeter apparatus, the method comprising the steps of:

(a) attaching a base member of a mold to a stationary platen of a molding system;

(b) attaching an opposing member of said mold to a movable platen of said molding system;

(c) inserting an emitter portion of a first fiber optic bundle into an emitter subhousing;

(d) inserting a detector portion of a second fiber optic bundle into a detector subhousing;

(e) positioning said emitter and said detector subhousings on an insert member of said mold so that said emitter portion of said first fiber optic bundle and said detector portion of said second fiber optic bundle are positioned diametrically opposite each other a predetermined distance apart;

(f) placing said insert member on which said emitter and said detector subhousings have been positioned upon said base member of said mold;

(g) pressing said opposing member onto said insert member via said movable and said stationary platens with said members together defining a cavity of predetermined shape wherein a housing of said probe is formable via introduction of a flowable material therein; and

(h) introducing the flowable material into said cavity to at least partially overmold said emitter and said detector subhousings therein thereby forming said housing thereabout so that said emitter and said detector portions are securely positioned diametrically opposite each other across an opening defined by said housing so that an alignment of said emitter and said detector portions is made largely impervious to movement of a body part when the body part is positioned within said opening of said housing and thus between said emitter and said detector portions therein during use of the probe.