CATHETERIZABLE MULTIPLE PHOTOMETER USABLE IN ANY PENETRABLE MEDIUM

• US 3,787,119 A
• Filed: 01/31/1972
• Issued: 01/22/1974
• Est. Priority Date: 01/29/1971
• Status: Expired due to Term

• Current Assignee: Boris Rybak
• Original Assignee: Boris Rybak
• Inventors: Rybak, Boris
• Primary Examiner(s): Wibert, Ronald L.
• Assistant Examiner(s): McGraw, V. P.
• Application Number:
  US05/222,169
• Time in Patent Office: 722 Days
• Field of Search: 356/40,41,229,39,72,73,180,181,182,184 250/227,222 210/321 128/2L,2.5E,2.5D,2.5F,2.1E,2E 23/23B
• US Class Current: 356/73
• CPC Class Codes: A61B 5/02042 Determining blood loss or bleeding, e.g. during a surgical procedure
• CPC Class Codes: A61B 5/02154 by optical transmission
• CPC Class Codes: A61B 5/1459 invasive, e.g. introduced into the body by a catheter A61B5/1464 takes precedence
• CPC Class Codes: G01L 9/0007 using photoelectric means G01L9/0076 takes precedence
• CPC Class Codes: G01L 9/0076 using photoelectric means
• CPC Class Codes: G01N 21/8507 Probe photometers, i.e. with optical measuring part dipped into fluid sample

Abstract

The device of the invention is constituted by a multiple photometer mounted in a catheter and comprising at least two associated photosensitive cells placed at a certain distance from one another and separated by open spaces called dish-members and at least one microlamp for energizing the said photosensitive cells. Said device allows continuous measurements, particularly in blood in vivo, of physical and chemical characteristics by means of natural or artificial colouring matters.

Claims

1. A microprobe comprising an elongated tubular member of relatively small diameter having therewithin photosensitive element means and microlamp means, dish-like means within said tubular member adapted to receive a circulating fluid and being disposed between and separating said photosensitive element means and microlamp means, said tubular member being provided with apertures communicating with said dish-like means, said apertures constituting an inlet and an outlet for the circulating fluid, said dish-like means comprising two independent open dish-like members each for making different tests and having interposed therebetween said microlamp means, said photosensitive element means comprising two independent photosensitive elements, each associated with said microlamp means and one of said independent dish-like members for providing an electrical signal related to said different tests made by each of said dish-like members, light transmissions between the microlamp means and each of said photosensitive elements, while the fluid is in the environ of said dish-like members, being substantially symmetrical.

2. A microprobe according to claim 1, wherein said elongated tubular member comprises a catheter member.

3. A microprobe according to claim 1, including filter means associated with at least one of said two photosensitive elements.

4. A microprobe according to claim 1, including a filler material which excepting for said two dish-like members fill the space within said elongated tubular member, said filler material serving to attach said microlamp means and said photosensitive element means within said tubular member.

5. A microprobe according to claim 1, wherein said elongated tubular member further includes a permeable membrane mounted over said apertures.

6. A microprobe according to claim 1, wherein said elongated tubular member includes resilient imperforate membrane means mounted in the region of said dish-like means, said imperforate membrane means having fixed thereon a photometric wedge.

7. A microprobe according to claim 2, wherein said photosensitive elements are longitudinally spaced from the other in the forward tip end portion of the catheter with said dish-like members therebetween, said dish-like members having adjacent end portions spaced from one another, said microlamp means comprising a sinGle microlight source positioned in said space between said dish-like members transversely to the longitudinal extent of the catheter.