Patent EP0153047A2 successfully refreshed from Google Patents.
EP0153047A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Transrectal prostate biopsy device
Assignee: Individual
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Filing: 1985-01-30
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Granted: —
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Expires: 2005-01-30
Abstract
Abstract An improved biopsy needle suitable for obtaining a core sample from a prostate glahα. A handle (14) which may be held in the palm of the physician's hand is provided with a forward extending guide tube (30). A cannula (20) with a sharpened distal end is slidably disposed within the guide tube and is movable by a thumb tab (46) from a retraced position within the guide tube to an extended position in which the cutting edge extends from the guide tube. A sampling stylet (10) having a sharpened distal end (12) and a sample-cdllecting slot (14) therein is telescopically disposed within the cannula and projects from the rear of the handle. A knob (50) at the proximal end of the stylet permits movement from a retracted position in which the pointed tip of the stylet projects slightly from the distal end of the guide tube to an extended position in which the pointed distal end extends from the guide tube distal end. The physician holding the handle in the palm of his hand places his index finger at the distal end of the guide tube and guides the distal end to a selected point on the prostate gland transrectally. Upon locating the desired point, the hand holds the instrument steady while the other hand pushes the stylet forward into the tissue, pushes the cannula forward to sever tissue within the sampling slot, and the device is then withdrawn with the desired sample.
Inventors
- 👤 Dan Beraha
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 19:47
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/02; A61B10/0233; A61B10/0241; A61B17/00; A61B17/00234; A61B2017/00238; A61B2017/00274; A61B18/00; A61B2018/00315; A61B2018/00547
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
289 words
A device for collecting a sample from human tissue for a biopsy comprising: a handle having a front and a rear end; a guide tube having a proximal end attached to said handle and a distal end projecting from said front end of said handle; a cannula telescopically disposed within said guide tube and having a proximal end within said handle and a distal end adjacent the distal end of said guide tube, said distal end sharpened to provide a cutting edge thereof; means disposed in said handle and attached to the proximal end of said cannula, said means for moving said cannula from a retracted position in which said cutting edge thereof is within said guide tube to an extended position in which said cutting edged projects a first selected distance from said distal end of said guide tube; a stylet telescopically disposed within said cannula and having a proximal end extending through said rear end of said handle, and a distal end sharpened to a point, said stylet having a tissue-collecting slot adjacent said distal end thereof; and a push knob attached to said proximal end of said stylet for moving said stylet from retracted position in which said point projects slightly from the distal end of said guide tube to an extended position in which said point projects a second selected distance from said distal end of said guide tube; whereby said cannula and said stylet are retracted when brought into contact with tissue to be sampled, said stylet is extended to the second selected distance thereby causing tissue to project into said slot and said cannula is then extended the first selected distance thereby cutting a core sample of the tissue extending into said slot.
Claim 2
Independent Claim
289 words
A device for collecting a sample from human tissue for a biopsy comprising: a handle having a front and a rear end; a guide tube having a proximal end attached to said handle and a distal end projecting from said front end of said handle; a cannula telescopically disposed within said guide tube and having a proximal end within said handle and a distal end adjacent the distal end of said guide tube, said distal end sharpened to provide a cutting edge thereof; means disposed in said handle and attached to the proximal end of said cannula, said means for moving said cannula from a retracted position in which said cutting edge thereof is within said guide tube to an extended position in which said cutting edged projects a first selected distance from said distal end of said guide tube; a stylet telescopically disposed within said cannula and having a proximal end extending through said rear end of said handle, and a distal end sharpened to a point, said stylet having a tissue-collecting slot adjacent said distal end thereof; and a push knob attached to said proximal end of said stylet for moving said stylet from retracted position in which said point projects slightly from the distal end of said guide tube to an extended position in which said point projects a second selected distance from said distal end of said guide tube; whereby said cannula and said stylet are retracted when brought into contact with tissue to be sampled, said stylet is extended to the second selected distance thereby causing tissue to project into said slot and said cannula is then extended the first selected distance thereby cutting a core sample of the tissue extending into said slot.
Claim 3
Dependent Claim
41 words
The device as defined in Claim 1 which further comprises: first stop means for defining said retracted position and said extended position of said cannula; and second stop means for defining said retracted position and said extended position of said stylet.
Claim 4
Dependent Claim
43 words
The device as defined in Claim 2 in which: said handle includes an aperture therein; and a thumb tab slidably disposed in said aperture, the proximal end of said cannula attached to said thumb tab, said aperture serving as said first stop means.
Claim 5
Dependent Claim
52 words
The device as defined in Claim 3 which further comprises: bias means for urging said thumb tab and said cannula in the extended direction; detent means for holding said thumb tab and said cannula in the retracted position; and release means for releasing said detent to permit said cannula to sharply extend.
Claim 6
Dependent Claim
20 words
The device as defined in Claim 1 in which said handle is formed to fit the palm of the hand.
Claim 7
Dependent Claim
50 words
The device as defined in Claim 2 in which said second stop means includes a stopbar attached to said push knob and having a first stop limiting the movement of said stylet in the retracted direction and a second stop limiting the movement of said stylet in the extended direction.
Claim 8
Dependent Claim
236 words
A transrectal biopsy device for obtaining core samples of prostatic tissue comprising: an elongate handle having a longitudinal opening therethrough; a guide tube inserted in said longitudinal opening at a forward end of said handle; a cannula disposed in a telescoping arrangement within said guide tube, said cannula having a cutting distal end thereof and having means for retracting said distal end of said cannula so as to be within said guide tube and for extending said cutting distal end therefrom; a sampling stylet having a sharpened distal end and a transverse sampling slot adjacent said distal end, said stylet disposed in a telescoping arrangement within said cannula and having a proximal end extending from said longitudinal opening at a rear end of said handle; and a push knob attached to said proximal end of said stylet, said push knob having a rearward position in which the distal end of said stylet projects slightly from the distal end of said guide tube and a forward position in which the distal end of said stylet projects slightly from the distal end of said cannula when said cannula is extended; whereby an operator may hold said handle in one hand and contact the distal end of said guide tube with the index finger of that hand and thereby guide the distal ends of said stylet and said cannula to a selected point on a prostate gland transrectal ly.
Claim 9
Dependent Claim
236 words
A transrectal biopsy device for obtaining core samples of prostatic tissue comprising: an elongate handle having a longitudinal opening therethrough; a guide tube inserted in said longitudinal opening at a forward end of said handle; a cannula disposed in a telescoping arrangement within said guide tube, said cannula having a cutting distal end thereof and having means for retracting said distal end of said cannula so as to be within said guide tube and for extending said cutting distal end therefrom; a sampling stylet having a sharpened distal end and a transverse sampling slot adjacent said distal end, said stylet disposed in a telescoping arrangement within said cannula and having a proximal end extending from said longitudinal opening at a rear end of said handle; and a push knob attached to said proximal end of said stylet, said push knob having a rearward position in which the distal end of said stylet projects slightly from the distal end of said guide tube and a forward position in which the distal end of said stylet projects slightly from the distal end of said cannula when said cannula is extended; whereby an operator may hold said handle in one hand and contact the distal end of said guide tube with the index finger of that hand and thereby guide the distal ends of said stylet and said cannula to a selected point on a prostate gland transrectal ly.
Claim 10
Dependent Claim
230 words
A biopsy device comprising: a) a handle; b) a set of three telescoping elements in which i) an outer one of said elements is a cylindrical guide tube having distal and proximal ends, said proximal end attached to said handle. ii) a middle one of said elements is a cutting cannula slidably disposed within said guide tube and having a sharpened distal end thereof which in a first position is retracted into the distal end of said guide tube and which in second position is extended a preselected distance from the distal end of said guide tube, and a proximal end attached to said handle, iii) an inner one of said elements is a sampling stylet slidably disposed within said cannula and having a pointed distal end, a transverse sampling slot adjacent said stylet distal end, and a proximal end projecting through said handle; c) a push knob attached to said proximal end of said stylet, said knob having a first position in which the pointed distal end of said stylet projects slightly beyond said distal end of said guide tube and a second position in which said pointed distal end of said stylet projects slightly beyond said distal end of said cannula when said cannula is in its second position; and d) means associated with said handle for moving said cannula between said first position and aid second position.
Claim 11
Dependent Claim
230 words
A biopsy device comprising: a) a handle; b) a set of three telescoping elements in which i) an outer one of said elements is a cylindrical guide tube having distal and proximal ends, said proximal end attached to said handle. ii) a middle one of said elements is a cutting cannula slidably disposed within said guide tube and having a sharpened distal end thereof which in a first position is retracted into the distal end of said guide tube and which in second position is extended a preselected distance from the distal end of said guide tube, and a proximal end attached to said handle, iii) an inner one of said elements is a sampling stylet slidably disposed within said cannula and having a pointed distal end, a transverse sampling slot adjacent said stylet distal end, and a proximal end projecting through said handle; c) a push knob attached to said proximal end of said stylet, said knob having a first position in which the pointed distal end of said stylet projects slightly beyond said distal end of said guide tube and a second position in which said pointed distal end of said stylet projects slightly beyond said distal end of said cannula when said cannula is in its second position; and d) means associated with said handle for moving said cannula between said first position and aid second position.
Claim 12
Independent Claim
215 words
A method of obtaining a tissue sample from a prostate gland utilizing a biopsy needle having a guide tube attached to a handle, an extendable cannula telescopically disposed in the guide tube and having a sharpened distal end thereof and a thumb tab at its proximal end for extending the cannula, and an extendable stylet telescopically disposed in the cannula having a sharpened distal end thereof and a knob at its proximal end for extending the stylet, comprising the steps of: placing the handle in he palm of one hand with the distal end of the guide tube held in contact with the tip of the index finger; inserting the index finger and the guide tube transrectally to contact the prostate gland of the patient; locating a desired point on the gland with the tip of the finger and the distal end of the guide tube; holding the handle and guide tube steady with the hand; moving the stylet knob in the extending direction using the other hand so as to penetrate the gland at the desired position; slicing a core of tissue in the stylet sampling slot by moving the cannula by means of the thumb tab in the extending direction using the other hand; and withdrawing the stylet and cannula from the gland.
Claim 13
Independent Claim
215 words
A method of obtaining a tissue sample from a prostate gland utilizing a biopsy needle having a guide tube attached to a handle, an extendable cannula telescopically disposed in the guide tube and having a sharpened distal end thereof and a thumb tab at its proximal end for extending the cannula, and an extendable stylet telescopically disposed in the cannula having a sharpened distal end thereof and a knob at its proximal end for extending the stylet, comprising the steps of: placing the handle in he palm of one hand with the distal end of the guide tube held in contact with the tip of the index finger; inserting the index finger and the guide tube transrectally to contact the prostate gland of the patient; locating a desired point on the gland with the tip of the finger and the distal end of the guide tube; holding the handle and guide tube steady with the hand; moving the stylet knob in the extending direction using the other hand so as to penetrate the gland at the desired position; slicing a core of tissue in the stylet sampling slot by moving the cannula by means of the thumb tab in the extending direction using the other hand; and withdrawing the stylet and cannula from the gland.
References Cited (Backward Citations)
No citation records indexed.
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