Pressure receiver

• US 3,880,151 A
• Filed: 07/06/1973
• Issued: 04/29/1975
• Est. Priority Date: 07/12/1972
• Status: Expired due to Term

• Current Assignee: Erik Olof Roland Larsson, Kenth Ake Sune Nilsson
• Original Assignee: Erik Olof Roland Larsson, Kenth Ake Sune Nilsson
• Inventors: Nilsson, Kenth Ake Sune, Larsson, Erik Olof Roland
• Primary Examiner(s): Gaudet, Richard A.
• Assistant Examiner(s): Cohen, Lee S.
• Application Number:
  US05/376,932
• Time in Patent Office: 662 Days
• Field of Search: 128/2.5E,2.5D 73/406,408,398AR 92/99,100,96
• US Class Current: 600/486
• CPC Class Codes: A61B 5/0215 by means inserted into the body catheters A61M25/00
• CPC Class Codes: A61B 5/025 within occluders, e.g. responsive to Korotkoff sounds electric stethoscopes A61B7/04

Abstract

A pressure receiver for measuring intravascular pressure, and preferably pressure of body fluids in which a pressure chamber is formed as a truncated or frusto-conical cone, within which a conical member is positioned so as to extend in an oppositely directed and symmetrical relationship with respect to the truncated cone; the conical member being ended at its smaller end portion by a rounded-off, preferably spherically curved surface, the surface of the conical member being at a radially spaced distance from the smaller base surface of the truncated cone of the chamber, and in which the conical member is positioned so that its rounded-off end surface lies at an axial distance with respect to the larger surface of the truncated cone of the chamber surface; passageways which are interconnected with the pressure chamber extending from the larger base surface of the conical member; and a separating element being positioned on the larger surface of the truncated cone of the chamber intermediate a pressure sensing or feeling portion and the pressure chamber.

Claims

1. Pressure receiver for the measurement of intravascular pressure and the pressure of body fluids or the like;

said pressure receiver comprising, a pressure chamber, and pressure sensing means communicating with said pressure chamber, said pressure chamber including a frusto-conical recess portion, a conical member symmetrically projecting into said frusto-conical recess having a slope opposite to that of the frusto-conical recess, said conical member having the sloped conical surface thereof extending into a substantially spherically curved end surface at its smaller conical end portion, the annular surface of the conical member being at a radially spaced distance from the smaller annular apex surface of the frusto-conical recess and the spherically curved surface of said conical member being an axially spaced distance from the larger annular base surface of said frusto-conical recess, passageways communicating with said pressure chamber proximate the larger annular base surface of said conical member at the smaller annular base surface of said frusto-conical recess, and substantially planar separating means being provided at the larger base surface of said frusto-conical recess intermediate said pressure sensing means and said pressure chamber, said passageways extending in parallel with said substantially planar separating means.

2. Pressure receiver as claimed in claim 1, said separating means comprising a flexible membrane, said membrane being adapted to bacteriologically and in an electrically insulative manner separate said pressure sensing means and said pressure chamber.

3. Pressure receiver as claimed in claim 1, wherein the generatrix of the conical surface of said frusto-conical recess subtends an angle in the range of approximately 2* and 20* with the axis of symmetry said recess.

4. Pressure receiver as claimed in claim 3, said angle being 5* with respect to the axis of symmetry.

5. Pressure receiver as claimed in claim 1, wherein the generatrix of the conical surface of said conical member subtends an angle in the range of approximately 2* to 20* with the symmetrical axis of said frusto-conical recess.

6. Pressure receiver as claimed in claim 5, said angle being 5* with respect to the axis of symmetry.

7. Pressure receiver as claimed in claim 1, said conical member being at a radial spacing relative to the smaller annular apex surface of said frusto-conical recess of between 0.5 mm and 2 mm.

8. Pressure receiver as claimed in claim 7, said radial spacing being 1.2 mm.