WO1993008753A1 - Improvements in or relating to cryogenic probes - Google Patents
Improvements in or relating to cryogenic probes Download PDFInfo
- Publication number
- WO1993008753A1 WO1993008753A1 PCT/GB1992/002031 GB9202031W WO9308753A1 WO 1993008753 A1 WO1993008753 A1 WO 1993008753A1 GB 9202031 W GB9202031 W GB 9202031W WO 9308753 A1 WO9308753 A1 WO 9308753A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- probe
- tip
- main portion
- head portion
- cryogenic
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/0046—Surgical instruments, devices or methods, e.g. tourniquets with a releasable handle; with handle and operating part separable
- A61B2017/00473—Distal part, e.g. tip or head
Definitions
- This invention relates to cryosurgical apparatus, and concerns in particular portable cryogenic probes such as are used by general practitioners and other doctors for out-patient treatment of skin lesions such as warts, moles and the like.
- portable cryogenic probes such as are used by general practitioners and other doctors for out-patient treatment of skin lesions such as warts, moles and the like.
- Such devices may be contact probes, where a super-cooled tip is applied directly to the surgical site, or may be spray devices where a spray of cryogen is directed on to the relevant site.
- the term "probe” is to be understood as referring to both types of device.
- Known probes are attached to a cryogenic supply apparatus and comprise a probe body and tip which are made of brass.
- the disadvantage of such a probe is that brass is expensive and the tips have to be sterilised before each use.
- a probe tip for a cryogenic probe the tip being adapted to be removably secured to a probe body.
- a cryogenic probe comprising a probe tip and a probe body, the tip being adapted to be removably secured to the probe body.
- the probe tip comprises securing means to secure the probe tip to the probe body.
- the securing means may comprise cooperating formations provided on the tip and the body adapted to cooperate with each other.
- the securing means comprise screw threads on the tip adapted to engage corresponding screw threads on the probe body.
- the threads on the probe tip may be internal and the threads on the body may be external.
- the probe tip compr ⁇ ises a main portion and a head portion, the head portion extending from the main portion.
- the main portion may be formed of a suitable plastics material, for example acetal, and the head portion may be formed of a suitable material for use in contacting the body tissue at super ⁇ cooled temperatures.
- the head portion may be formed of a metallic material, for example brass.
- the probe body may comprise an extending portion upon which the threads are formed.
- Exhaust means may be provided to exhaust evapora ⁇ ted cryogen from the probe.
- the exhaust means comprises an exhaust tube projecting from the probe body.
- Fig. 1 is a sectional view of a probe tip
- Fig. 2 is a view along the lines 11—11 in Fig. 1;
- Fig. 3 is a sectional view of a probe body
- Fig. 4 is a view along the lines IV-IV in Fig. 3.
- a probe tip 10 which comprises a main portion 12 and a head portion 14.
- the main portion 12 has a bore 16 extending from one end 18 to the head portion 14.
- the main portion 12 comprises internal threads 20 which extend from the end region 18 towards the head portion 14.
- the main portion 12 is formed of a suitable plas ⁇ tics material for example acetal and the head portion 14 is formed of a suitable metallic material, for example brass.
- the probe tip 10 is rendered dispos ⁇ able.
- a new tip can be used for each separate cryosurgical treatment. This possibility ensures high standards of hygiene and obviates the risk of cross-contamination between successive patients.
- Fig. 3 shows a probe body 30 which has a bore 32 extending therethrough.
- a portion 34 extending from one end of the body 30 is provided with external threads 36 which can threadably engage the threads 20 on the main portion 12 of the probe tip 10, thereby securing the probe tip 10 to the body 30.
- the other end of the probe body 30 is provided with a further threaded portion 42 which is adapted to engage suitable cryogenic supply apparatus (not shown) which is well known in the art.
- the probe body 30 is also provided with an exhaust tube 38 having a bore 40 extending therethrough, in communication with the bore 32.
- the probe tip 10 is threadably attached to the extending portion 34 of the body 30 to secure the tip 10 to the body 30 with the respective bores 16, 32 in register.
- the further threaded portion 42 is then threadably attached to suitable cryogenic supply apparatus (not shown).
- a cryogen for example, liquid nitrogen
- a cryogen is then passed from the cryogenic supply apparatus through the bore 32, into the bore 16 where, upon contact with the head portion 14, it evaporates.
- the head portion 14 is supercooled.
- the evaporated cryogen is then exhausted via the bore 40 of the exhaust tube 38.
- the supercooled head portion 14 can then be applied to lesions on the skin for surgical removal.
- the threads securing the probe tip to the probe body could be reversed such that the internal threads are on the probe body and the external threads are on the probe tip.
- the probe tip and body portions may be configured differently from those described and shown.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5508266A JPH07503627A (en) | 1991-11-05 | 1992-11-03 | Cryogen probes or improvements thereto |
EP92922736A EP0611295A1 (en) | 1991-11-05 | 1992-11-03 | Improvements in or relating to cryogenic probes |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB919123414A GB9123414D0 (en) | 1991-11-05 | 1991-11-05 | Improvements in or relating to cryogenic probes |
GB9123414.6 | 1991-11-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1993008753A1 true WO1993008753A1 (en) | 1993-05-13 |
Family
ID=10704053
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1992/002031 WO1993008753A1 (en) | 1991-11-05 | 1992-11-03 | Improvements in or relating to cryogenic probes |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0611295A1 (en) |
JP (1) | JPH07503627A (en) |
GB (1) | GB9123414D0 (en) |
WO (1) | WO1993008753A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995030380A2 (en) * | 1994-05-10 | 1995-11-16 | Spembly Medical Limited | Cryosurgical instrument |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4377168A (en) * | 1981-02-27 | 1983-03-22 | Wallach Surgical Instruments, Inc. | Cryosurgical instrument |
GB2244922A (en) * | 1990-06-01 | 1991-12-18 | Cryogenic Instr & Equipment Li | Cryogenic device |
-
1991
- 1991-11-05 GB GB919123414A patent/GB9123414D0/en active Pending
-
1992
- 1992-11-03 WO PCT/GB1992/002031 patent/WO1993008753A1/en not_active Application Discontinuation
- 1992-11-03 EP EP92922736A patent/EP0611295A1/en not_active Withdrawn
- 1992-11-03 JP JP5508266A patent/JPH07503627A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4377168A (en) * | 1981-02-27 | 1983-03-22 | Wallach Surgical Instruments, Inc. | Cryosurgical instrument |
GB2244922A (en) * | 1990-06-01 | 1991-12-18 | Cryogenic Instr & Equipment Li | Cryogenic device |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1995030380A2 (en) * | 1994-05-10 | 1995-11-16 | Spembly Medical Limited | Cryosurgical instrument |
GB2289414A (en) * | 1994-05-10 | 1995-11-22 | Spembly Medical Ltd | Cryosurgical instrument |
WO1995030380A3 (en) * | 1994-05-10 | 1996-05-02 | Spembly Medical Ltd | Cryosurgical instrument |
GB2289414B (en) * | 1994-05-10 | 1998-05-13 | Spembly Medical Ltd | Cryosurgical instrument |
US5860970A (en) * | 1994-05-10 | 1999-01-19 | Spembly Medical Limited | Cryosurgical instrument |
Also Published As
Publication number | Publication date |
---|---|
EP0611295A1 (en) | 1994-08-24 |
GB9123414D0 (en) | 1991-12-18 |
JPH07503627A (en) | 1995-04-20 |
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