Stabbing apparatus for diagnosis of living body

• US 4,299,230 A
• Filed: 05/09/1979
• Issued: 11/10/1981
• Est. Priority Date: 05/09/1979
• Status: Expired due to Term

• Current Assignee: Olympus Optical Corporation Limited (Olympus Corporation)
• Original Assignee: Olympus Optical Corporation Limited (Olympus Corporation)
• Inventors: Kubota, Tetsumaru
• Primary Examiner(s): HOWELL, KYLE
• Application Number:
  US06/037,352
• Time in Patent Office: 916 Days
• Field of Search: 128/630, 128/347, 128/329 R, 128/748, 116/307
• US Class Current: 600/300
• CPC Class Codes: A61B 17/3494 with safety means for protection against accidental cutting or pricking, e.g. limiting insertion depth, pressure sensors for the peridural space A61B17/3401
• CPC Class Codes: A61B 2090/064 for measuring force, pressure or mechanical tension
• CPC Class Codes: A61B 2090/08021 of the patient or his organs
• CPC Class Codes: A61B 2505/05 Surgical care
• CPC Class Codes: A61B 2562/0247 Pressure sensors
• CPC Class Codes: A61B 2562/043 in a linear array
• CPC Class Codes: A61B 5/03 Detecting, measuring or recording fluid pressure within the body other than blood pressure, e.g. cerebral pressure; Measuring pressure in body tissues or organs A61B5/205 takes precedence
• CPC Class Codes: A61B 5/1107 Measuring contraction of parts of the body, e.g. organ, muscle apparatus for measuring work or force in general G01L
• CPC Class Codes: A61B 5/6823 Trunk, e.g., chest, back, abdomen, hip

Abstract

A stabbing apparatus for penetration of a living body wall, having a stabbing apparatus body provided with a sharp edge, a pressure sensor disposed on the peripheral surface thereof to sense the pressure to which the sensor is subjected when stabbing a living body wall, and an indicator responsive to the sensed pressure above a predetermined level, whereby the depth of penetration of the stabbing apparatus body with respect to the living body wall is indicated.

Claims

1. A stabbing apparatus for penetration of a living body wall comprising:

a stabbing apparatus body having a sharp edge;

a plurality of pressure sensor elements axially disposed on the peripheral surface of said stabbing apparatus body to sense in succession the pressure to which each said sensor is subjected during penetration of a living body wall; and

means connected to said sensor elements for detecting the pressure above a predetermined level exerted upon each respective sensor element, including separate indicator means responsive to said pressure for each successive axially disposed sensor, whereby the depth of penetration of said stabbing apparatus body with respect to said living body wall is indicated.

2. A stabbing apparatus according to claim 1, wherein said indicator means includes a reference level source to provide a reference signal representing said predetermined level, a comparator comparing a first signal corresponding to the sensed pressure with said reference signal and delivering a second signal when said first signal becomes higher or lower than said reference signal and an indicator device to indicate stabbing of said edge into said living body wall by means of said signal.

3. A stabbing apparatus according to claim 2 further comprising a monostable multivibrator triggered by disappearance of said second signal to produce a third signal for a fixed time, an alarm generator to provide a fourth signal for an alarm operation, a gate circuit to provide the logical product of said third and fourth signals and an alarm device to perform the alarm operation when the logic levels of said third and fourth signals both become "1" in said gate circuit.