Apparatus for measurement of blood saturation and hematocrit

• US 5,356,593 A
• Filed: 09/10/1992
• Issued: 10/18/1994
• Est. Priority Date: 02/15/1991
• Status: Expired due to Term

• Current Assignee: Cobe Cardiovascular Incorporated (LivaNova Plc)
• Original Assignee: COBE Laboratories Incorporated (Terumo Corporation)
• Inventors: Heiberger, Robert A., Price, James R., Ingebrigtsen, Jon S.
• Primary Examiner(s): Warden, Robert J.
• Assistant Examiner(s): MCKANE, ELIZABETH L
• Application Number:
  US07/943,281
• Time in Patent Office: 768 Days
• Field of Search: 422/45, 422/82.05, 385/56, 385/58, 385/59, 385/45, 385/88, 385/89, 385/92, 385/71, 606/15, 606/16, 604/905, 128/634, 128/666, 128/667, 607/92, 607/93
• US Class Current: 422/45
• CPC Class Codes: A61B 5/14535 for measuring haematocrit
• CPC Class Codes: A61B 5/14557 specially adapted to extracorporeal circuits
• CPC Class Codes: A61M 1/3609 Physical characteristics of the blood, e.g. haematocrit, urea
• CPC Class Codes: A61M 1/367 Circuit parts not covered by the preceding subgroups of group A61M1/3621
• CPC Class Codes: A61M 2230/205 partial oxygen pressure (P-O2)

Abstract

Medical equipment for use in for example measurement of hematocrit and oxygen saturation in blood in which a connector portion includes protuberances to draw the portion relatively toward a probe, a window to cooperate with the probe, and a ramp and slot to cooperate with the probe to selectively limit its rotation.

Claims

1. Medical equipment for connection to a fiber optic probe which comprises

a fluid conduit with an internal flat surface,

a side arm connected sealedly with said conduit,

a blind hole in said side arm,

said blind hole including a hole flat surface parallel with said internal flat surface and defining therewith a light transmissive wall, and a projection protruding from said side arm.

2. An oxygenator which comprises

a fluid conduit with an internal flat surface,

a side arm connected sealedly with said conduit,

a blind hole in said side arm,

said blind hole including a hole flat surface parallel with said internal flat surface and defining therewith a light transmissive wall, and a projection protruding from said side arm.

3. The oxygenator of claim 2 in which two ears are circumferentially spaced 180°

and protrude perpendicularly from said side arm.

4. The oxygenator of claim 3 which includes a ramp descending in height in a conduit direction into a notch also extending in a said conduit direction.

12. The control box of claim 9 which includes a testing port configured to cooperate with the probe of claim 4 to move and position said probe tip as in claim 5 spaced from a reflective surface.

5. A probe including at least one end, each said end comprising

a probe tip with a smooth face in which lie the extremities of three optical fibers and

an axially extending key adapted to ride on a ramp to, and mate with, a notch to prevent relative rotation between said tip and a side arm and maintain fiber optic orientation relative to said side arm,

said three optical fibers,

a collar, said collar including

a pair of camming slots circumferentially spaced 180°

for cooperation with ears on said side arm, each of said slots including

a first portion angularly related to the axis of said collar to on rotation in a first direction drive said ears toward said collar and

a second portion angularly related to said axis to on said rotation drive said ears away from said collar,

a pair of longitundinally extending grooves for cooperation with said ears to allow their movement into said slots, and

spring support means, and

spring means biasing said tip away from said collar.

6. A probe as defined in claim 5 which includes two ends, each of said ends being a said end.

7. The combination of claim 5 in which said first portion is at an angle of 60°

to said axis and has a circumferential length of 90° and

said second portion is at an angle of 75°

to said axis and has a circumferential length of 15°

.

8. A receptor for the probe of claim 5 which includes an elastomeric bushing arranged to accept said probe collar.

9. A control box with an operating port configured to cooperate with said probe tip as in claim 5 against a surface including said optical fibers,

first optical light generating means optically connected to a first of said optical fibers, and

second optical light generating means optically connected to a second of said optical fibers.

10. The control box of claim 9 in which said first of said optical fibers is joined to said second of said optical fibers and both are joined in molded juncture to a third optical fiber said fibers being of integrally molded plastic.

11. The control box of claim 10 in which said juncture is in the configuration of a Y.

13. The control box of claim 9 which includes an aperture for receiving light from an optical fiber, and adjustable aperture opening size means.

14. A fiber optic probe for connection to medical equipment, said medical equipment having a receptor for said probe, a hole in said receptor, said hole having a first end and second open end for entry of the probe into the hole, two ears that are circumferentially spaced 180°

about said receptor and that protrude perpendicularly from said receptor and a ramp descending in height in a direction from the second end toward the first end into a notch also extending the direction from the second end toward the first end, said probe comprising;

at least one optical fiber, each optical fiber having an extremity,

a probe tip with a face in which lies the extremity of the each optical fibers,

an axially extending key adapted to ride on a ramp to, and mate with, a notch to prevent relative rotation between said probe tip and receptor and maintain fiber optic orientation relative to said receptor arm, and

a collar having an axis, said collar comprising,

a pair of camming slots circumferentially spaced 180°

located to cooperate with said ears, each of said slots including,

a first portion at a first predetermined angular relation to the axis of said collar, the angular relation being predetermined to drive said ears toward said collar upon rotation in a first direction about the axis, and

a second portion at a second predetermined angular relation to the axis of said collar, the angular relation being predetermined to drive said ears away from said collar upon rotation in the first direction,

a pair of longitudinally extending grooves located to cooperate with said ears to allow their movement into said slots, and

spring support means, and

a spring means biasing said tip away from said collar.

15. The probe of claim 14 wherein the probe has a first end and a second end, each optical fiber has a first extremity and a second extremity, and wherein:

the first end has a corresponding probe tip with a face in which lies the first extremity of the each optical fiber,

the second end has a corresponding probe tip with a face in which lies the second extremity of each optical fiber, and

each one of the first and the second ends has an associated axially extending key, an associated collar, and an associated spring means biasing the corresponding tip away from the associated collar.

16. The probe of claim 14 in which said first portion of each camming slot is at an angle of 60°

to said axis and has a circumferential length of 90° and

said second portion of each camming slot is at an angle of 75°

to said axis and has a circumferential length of 15°

.

17. The probe of claim 14 which includes an elastomeric bushing arranged to accept said probe collar.

18. A control box for use with a fiber optic probe comprising:

an operating port,

a hole in said operating port said hole having a first end and second open end for entry of the probe into the hole, and

a projection protruding from said operating port,

a first optical fiber,

a first optical light generating means optically connected to the first optical fiber,

a second optical fiber, and

a second optical light generating means optically connected to the second optical fiber,

said first optical fiber extending from said first optical light toward said hole and said projection in said operating port, and

said second optical fiber extending from said second optical light toward said hole and said projection in said operating port,

wherein the operating port further comprises

two ears that are circumferentially spaced 180°

about a side arm and that protrude perpendicularly from said side arm, and

a ramp descending in height in a direction from the second end toward the first end into a notch also extending in the direction from the second end toward the first end wherein the probe further comprises

at least one optical fiber, each optical fiber having an extremity,

a probe tip with a face in which lies the extremity of each optical fiber,

an axially extending key adapted to ride on said ramp to, and mate with, said notch to prevent relative rotation between said probe tip and operating port and maintain fiber optic orientation relative to said operating port, and

a collar having an axis, said collar comprising,

a pair of camming slots circumferentially spaced 180°

located to cooperate with said ears, each of said slots including,

a first portion at a first predetermined angular relation to the axis of said collar, the angular relation being predetermined to drive said ears toward said collar upon rotation in a first direction about the axis, and

a second portion at a second predetermined angular relation to the axis of said collar, the angular relation being predetermined to drive said ears away from said collar upon rotation in the first direction,

a pair of longitudinally extending grooves located to cooperate with said ears to allow their movement into said slots, and

spring support means, and

a spring means biasing said tip away from said collar.

19. The control box of claim 18 in which said first portion of each camming slot is at an angle of 60°

to said axis and has a circumferential length of 90° and

said second portion of each camming slot is at an angle of 75°

to said axis and has a circumferential length of 15°

.

20. The control box of claim 18 in which said ears and said ramps are integral to a single part of the operating port and said ramps are on a single part of the operating port only.

21. The control box of claim 18 which includes an elastomeric bushing arranged to accept said probe collar.

22. The control box of claim 18 wherein the control box further comprises a testing port means to cooperate with the probe to move and position said probe tip spaced from a reflective surface.

23. The control box of claim 18 wherein the control box further comprises an aperture for receiving light from an optical fiber, and adjustable aperture opening size means.

24. A fiber optic connector comprising:

a receptor comprising;

a hole in said receptor said hole having a first end and second open end for entry of the probe into the hole,

two ears that are circumferentially spaced 180°

about said receptor and that protrude perpendicularly from said receptor, and

a ramp descending in height in a direction from the second end toward the first end into a notch also extending the direction from the second end toward the first end, and

a probe mating with the receptor, said probe comprising

at least one optical fiber, each optical fiber having an extremity,

a probe tip with a face in which lies the extremity of the each optical fiber,

an axially extending key adapted to ride on said ramp to, and mate with, said notch to prevent relative rotation between said probe tip and receptor and maintain fiber optic orientation relative to said receptor, and

a collar having an axis, said collar comprising,

a pair of camming slots circumferentially spaced 180°

located to cooperate with said ears, each of said slots including,

a first portion at a first predetermined angular relation to the axis of said collar, the angular relation being predetermined to drive said ears toward said collar upon rotation in a first direction about the axis, and

a second portion at a second predetermined angular relation to the axis of said collar, the angular relation being predetermined to drive said ears away from said collar upon rotation in the first direction,

a pair of longitudinally extending grooves located to cooperate with said ears to allow their movement into said slots, and

spring support means, and

a spring means biasing said tip away from said collar.

25. The connector of claim 24 wherein the probe has a first end and a second end, each optical fiber has a first extremity and a second extremity, and wherein:

the first end has a corresponding probe tip with a face in which lies the first extremity of each optical fiber,

the second end has a corresponding probe tip with a face in which lies the second extremity of each optical fiber, and

each one of the first and the second ends has an associated axially extending key, an associated collar, and an associated spring means biasing the corresponding tip away from the associated collar.

26. The connector of claim 24 in which said first portion of each camming slot is at an angle of 60°

to said axis and has a circumferential length of 90° and

said second portion of each camming slot is at an angle of 75°

to said axis and has a circumferential length of 15°

.

27. The connector of claim 24 which includes an elastomeric bushing arranged to accept said probe collar.

28. An oxygenator for connection to a fiber optic probe, comprising

an oxygenator housing,

a fluid conduit with an internal flat surface, the conduit in fluid communication with the housing,

a side arm connected sealedly with said conduit,

a blind hole including a hole flat surface parallel with said internal flat surface and defining therewith a light transmissive wall, and a projection protruding from said side arm.