Connect public, paid and private patent data with Google Patents Public Datasets

Method for cleaning cavities with a combined fluid delivering and aspirating instrument

Download PDF

Info

Publication number
US3871099A
US3871099A US42907973A US3871099A US 3871099 A US3871099 A US 3871099A US 42907973 A US42907973 A US 42907973A US 3871099 A US3871099 A US 3871099A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
tube
cavity
end
needle
working
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
Inventor
Henry Kahn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KG CO
Original Assignee
KG CO
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Grant date

Links

Images

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/02Rinsing or air-blowing devices, e.g. using fluid jets or comprising liquid medication
    • A61C17/0208Rinsing or air-blowing devices, e.g. using fluid jets or comprising liquid medication combined with means providing suction
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61CDENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C5/00Filling or capping teeth
    • A61C5/40Implements for surgical treatment of the roots or nerves of the teeth; Nerve needles; Methods or instruments for medication of the roots

Abstract

The present invention relates to a method for cleansing a cavity with a combined fluid-delivering and aspirating instrument wherein nested hollow members are utilized having open ends adapted to enter a chamber or cavity such as a tooth cavity. The inner hollow member supplies fluids such as medicaments, antiseptics or other liquids to the tooth cavity from a suitable source and the outer hollow member aspirates material, including the liquid, blood and filings from the cavity. The outer hollow member is connected to a source of vacuum or an aspirating device and may include a separable tubular insert telescoped in the outer end of the outer hollow member. The inner hollow member is preferably in the form of a hypodermic needle or cannula which forms part of a reservoir constituting a source of fluid, e.g., the barrel of a hypodermic syringe. The outer hollow member or members are formed of a material such as a plastic composition which the needle may readily pierce or puncture and which is self-sealing to enable a fluid-tight seal at the puncture. The outer open ends of the tube and insert and the outer open end of the needle may be termed the working ends thereof. The hypodermic needle preferably extends slightly beyond the end of the outer hollow member into the cavity and is bent so that the upper end extends outwardly of the outer hollow member above the point where the end thereof enters the outer hollow member. It is unnecessary to otherwise fasten the hypodermic needle to the aspirating tube but, for integrity, this is preferably done. In any case, the arrangement is such that the outer hollow member and cannula are axially adjustable.

Description

United States Patent [1 1 Kahn [ Mar. 18, 1975 METHOD FOR CLEANING CAVITIES WITH A COMBINED FLUID DELIVERING AND ASPIRATING INSTRUMENT Inventor: Henry Kahn, Highland Park, Ill.

[73] Assignee: KG Company, Chicago, Ill.

] Filed: Dec. 28, 1973 Appl. No.: 429,079

Related U.S. Application Data [63] Continuation of Ser. No. 183,973, Sept. 27, 1971,

Primary Examiner-Robert Peshock [5 7] ABSTRACT The present invention relates to a method for cleansing a cavity with a combined fluid-delivering and aspirating instrument wherein nested hollow members are utilized having open ends adapted to enter a chamber or cavity such as a tooth cavity. The inner hollow member supplies fluids such as medicaments, antiseptics or other liquids to the tooth cavity from a suitable source and the outer hollow member aspirates material, including the liquid, blood and filings from the cavity. The outer hollow member is connected to a source of vacuum or an aspirating device and may include a separable tubular insert telescoped in the outer end of the outer hollow member. The inner hollow member is preferably in the form of a hypodermic needle or cannula which forms part of a reservoir constituting a source of fluid, e.g., the barrel of a hypodermic syringe. The outer hollow member or members are formed of a material such as a plastic composition which the needle may readily pierce or puncture and which is self-sealing to enable a fluid-tight seal at the puncture. The outer open ends of the tube and insert and the outer open end of the needle may be termed the working ends thereof.

arrangement is such that the outer hollow member and cannula are axially adjustable.

8 Claims, 2 Drawing Figures 3,871 ,OSS

PATENTEU MAR] 81975 METHOD FOR CLEANING CAVITIES WITH A COMBINED FLUID DELIVERING AND ASPIRATING INSTRUMENT This is a continuation, application Ser. No. 183.973, filed 27 Sept. 71 and now abandoned.

BACKGROUND OF THE INVENTION In the art of using hand-held dental instruments for delivering a fluid to a tooth cavity and aspirating the fluid and any other foreign matter, such as particles of bone, therefrom and similar purposes, problems have been encountered in providing and using a compact instrument which includes sterilizable parts capable of being readily and cheaply replaced. The present invention provides a hand-held instrument satisfying these objectives.

DESCRIPTION OF THE PRIOR ART It has been proposed, as shown in US. Pat. No. 3,164,153, dated Jan. 5, 1965, particularly FIG. 5, to provide a dental instrument wherein two tubular needles are joined at one end to enter a tooth cavity. One connects with a source of medicinal liquid and the second with a source of vacuum to collect liquid and tooth fragments drawn from the tooth cavity. However, such apparatus is cumbersome, occupies considerable space within the mouth of the patient and is difficult to sterlize or readily provide with replaceable parts.

It has also been proposed in US. Pat. No. 3,208,145, dated Sept. 28, 1965, to provide an aspirating handpiece with controls for vacuum, air and water, wherein the vacuum source is connected to one tube and the air and water sources are connected to other smaller tubes which are secured to or lie along the side of the outer surface of the vacuum tube. This device is also spaceconsuming and is difficult to maintain in a sterile condition or to utilize replaceable, inexpensive parts.

SUMMARY OF THE INVENTION The invention herein utilizes a tube of a plastic composition which is resilient but generally shape-retaining and self-sealing if punctured, e.g., polyethylene, the working end of which, or an extension thereof, is adapted to enter a cavity from which material is to be aspirated, such as a tooth cavity, and a hypodermic needle or cannula passing through the wall of the tube and extending into the tube and also into the cavity for supplying fluids such as medicinal or antiseptic liquids to the cavity. The smaller or extension tube is to provide a reduced end for entrance to the cavity, but the main tube could, if desired, be formed with a reduced end.

BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a view of the dental instrument including a partial sectional view of a tooth of a patient, with the tube for conveying liquid to the cavity and for aspirating material therefrom positioned in the cavity.

FIG. 2 is a partial enlarged sectional view of the end of the tube and extension insert shown in FIG. 1, with the hypodermic needle shown in elevation.

DESCRIPTION OF THE PREFERRED EMBODIMENT The novel dental instrument of this invention is used, for example, to supply medicinal or antiseptic fluid or the like to a cavity 12 in a tooth ll of a patient.

An aspirating tube 14 is provided and is connected by a nipple 15 to a source of vacuum or an aspirator source 10. The tube 14 is preferably formed of a plastic composition, having the characteristics mentioned above, e.g., polyethylene. A tubular insert or extension 16, preferably formed of a resilient material capable of being sterilized, e.g., Teflon, is a press fit into the working end ofthe tube 14 (FIG. 2). This reduction in diameter is for convenience of introduction into the cavity. Alternatively, the insert may be omitted and the lower end of the tube 14 may be reduced in diameter. However, the inserted piece 16 is preferred since, by so doing, commonly available stock tubing may be employed for both pieces and sterilization simplified. The distal end of the insert 16 is adapted to extend into the tooth cavity 12.

In order to supply liquids, such as medicinal fluids or antiseptic fluids (although gas or air could also be supplied) a hypodermic syringe 17 is utilized. The syringe is of standard construction and includes a barrel 18, a finger grip l9 and a plunger 20 having a piston 21 at the lower end thereof extending into the barrel 18 to force liquid therefrom. The cannula 22, which is preferably bent at a fairly acute angle to its axis, pierces the soft plastic tube 14, as best shown in FIG. 2, in fluid-tight sealing relationship therewith. In the operative assembly, the needle extends slightly below the lower end of the tube 16 into the tooth cavity 12. By making the end of the needle blunt, access to the bottom of the tooth cavity' is rendered simpler. The method of assembling the needle and aspirating tube allows vertical adjustment thereof to accommodate to the geometry of the cavity. In this Way, liquid remaining in-the cavity at any one time may be regulated. In conventional hypodermic syringes the cannula 22 is detachably secured by a quick disconnect member 24.

At this juncture it will have become apparent that the entire instrument comprises readily available parts which are readily assembled in a matter of minutes without the use of special tools. In operation they syringe 17 is filled with the desired liquid and the tube 14 is connected to the vacuum source which is under the control of the operator as is well known. As liquid is supplied to the cavity through the cannula 22, the aspirating tube 14 will concurrently remove any blood and other liquids and debris, such as tooth filings. By reason of its inexpensive construction, the device is expendable. However, if desired, the apparatus may be sterilized and reused.

It will be apparent that the apparatus is very compact, may be inserted into the mouth of the patient and into a tooth cavity very easily and without unduly discommoding the patient. The concentric arrangement of aspirating tube and cannula enables entrance into a very small cavity. It is also clear that the instrument may be utilized in surgical procedures generally where irrigating and aspirating are to be performed concurrently in a field having restricted accessibility.

What is claimed is:

1. A method particularly useful in dental and surgical procedures for cleansing a cavity by aspirating fluids and other materials from a cavity and delivering fluids such as medicaments into said cavity comprising inserting into the cavity the working end portion of a plastic suction tube of a self-sealing composition having memory when penetrated, the working end portion having the working end portion of a hypodermic needle which has been inserted through the wall of said tube portion in fluid-sealing relationship interiorly positioned in substantially coaxial relationship with the interior of said tube portion, the working end portion of the needle having been bent at an acute angle to the needle axis so that the portion of the needle remaining outside the tube for the attachment of a hypodermic syringe is at an angle to said suction tube, attaching a hypodermic syringe filled with the selected liquid to said needle, connecting the distal end of said suction tube to a vacuum source and simultaneously, or in selected independent sequence, delivering the liquid from the syringe into the cavity and withdraw liquid and other matter from said cavity through said suction tube.

2. The method according to claim 1 wherein the working end of the needle and the working end of the suction tube are vertically adjusted with reference to each other to accommodate the geometry of the cavity.

3. The method according to claim 2 wherein a tubular extension is fitted into the working end of said tube and the working end of said needle is inserted through said tube wall above said extension.

4. The method according to claim 3 wherein the extension is of readily-puncturable material and the needle pierces both the suction tube and the extension.

5. A method particularly useful in dental and surgical procedures for cleansing a cavity by aspirating fluids and other materials from a cavity and delivering fluids such as medicaments into said cavity comprising inserting the working end portion of a hypodermic needle which is bent at an acute angle to its axis through the wall of a plastic suction tube adjacent the working end thereof in substantially coaxial relationship with the interior of said tube to define an annular passageway therebetween, said tube being of a soft composition having memory which will form a fluid-tight seal when the tube wall is penetrated by said needle, connecting the distal end of said tube to a vacuum source, attaching a hypodermic syringe filled with the selected fluid to said needle, inserting the working end portion of said tube with the interiorly positioned needle into said cavity and simultaneouly, or in selected independent sequence, delivering the fluid from the syringe through the needle into the cavity and withdrawing liquid and other matter from the cavity through the suction tube.

6. The method according to claim 5 wherein the working end of the needle and the working end of the suction tube are vertically adjusted with reference to each other to accommodate the geometry of the cavity.

7. The method according to claim 6 wherein a tubular extension is fitted into the working end of said tube and the working end of said needle is inserted through said tube wall above said extension.

8. The method according to claim 7 wherein the extension is of readily-puncturable material and the needle pierces both the suction tube and the extension.

=l =l =l

Claims (8)

1. A method particularly useful in dental and surgical procedures for cleansing a cavity by aspirating fluids and other materials from a cavity and delivering fluids such as medicaments into said cavity comprising inserting into the cavity the working end portion of a plastic suction tube of a self-sealing composition having memory when penetrated, the working end portion having the working end portion of a hypodermic needle which has been inserted through the wall of said tube portion in fluid-sealing relationship interiorly positioned in substantially coaxial relationship with the interior of said tube portion, the working end portion of the needle having been bent at an acute angle to the needle axis so that the portion of the needle remaining outside the tube for the attachment of a hypodermic syringe is at an angle to said suction tube, attaching a hypodermic syringe filled with the selected liquid to said needle, connecting the distal end of said suction tube to a vacuum source and simultaneously, or in selected independent sequence, delivering the liquid from the syringe into the cavity and withdraw liquid and other matter from said cavity through said suction tube.
2. The method according to claim 1 wherein the working end of the needle and the working end of the suction tube are vertically adjusted with reference to each other to accommodate the geometry of the cavity.
3. The method according to claim 2 wherein a tubular extension is fitted into the working end of said tube and the working end of said needle is inserted through said tube wall above said extension.
4. The method according to claim 3 wherein the extension is of readily-puncturable material and the needle pierces both the suction tube and the extension.
5. A method particularly useful in dental and surgical procedures for cleansing a cavity by aspirating fluids and other materials from a cavity and delivering fluids such as medicaments into said cavity comprising inserting the working end portion of a hypodermic needle which is bent at an acute angle to its axis through the wall of a plastic suction tube adjacent the working end thereof in substantially coaxial relationship with the interior of said tube to define an annular passageway therebetween, said tube being of a soft composition having memory which will form a fluid-tight seal when the tube wall is penetrated by said needle, connecting the distal end of said tube to a vacuum source, attaching a hypodermic syringe filled with the selected fluid to said needle, inserting the working end portion of said tube with the interiorly positioned needle into said cavity and simultaneouly, or in selected independent sequence, delivering the fluid from the syringe through the needle into the cavity and withdrawing liquid and other matter from the cavity through the suction tube.
6. The method according to claim 5 wherein the working end of the needle and the working end of the suction tube are vertically adjusted with reference to each other to accommodate the geometry of the cavity.
7. The method according to claim 6 wherein a tubular extension is fitted into the working end of said tube and the working end of said needle is inserted through said tube wall above said extension.
8. The method according to claim 7 wherein the extension is of readily-puncturable material and the needle pierces both the suction tube and the extension.
US3871099A 1971-09-27 1973-12-28 Method for cleaning cavities with a combined fluid delivering and aspirating instrument Expired - Lifetime US3871099A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US18397371 true 1971-09-27 1971-09-27
US3871099A US3871099A (en) 1971-09-27 1973-12-28 Method for cleaning cavities with a combined fluid delivering and aspirating instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3871099A US3871099A (en) 1971-09-27 1973-12-28 Method for cleaning cavities with a combined fluid delivering and aspirating instrument

Publications (1)

Publication Number Publication Date
US3871099A true US3871099A (en) 1975-03-18

Family

ID=26879699

Family Applications (1)

Application Number Title Priority Date Filing Date
US3871099A Expired - Lifetime US3871099A (en) 1971-09-27 1973-12-28 Method for cleaning cavities with a combined fluid delivering and aspirating instrument

Country Status (1)

Country Link
US (1) US3871099A (en)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0201119A1 (en) * 1985-04-18 1986-11-12 FARO FABBRICA APPARECCHIATURE RAZIONALI ODONTOIATRICHE S.p.A. Apparatus for performing root canal therapy in dentistry
US4993947A (en) * 1987-07-16 1991-02-19 Meditec S.A. Equipment for the treatment of dental roots
US5066232A (en) * 1989-10-04 1991-11-19 Biomedic S.R.L. Method of removing pulp with an alkaline product
US5913859A (en) * 1997-07-01 1999-06-22 Shapira; Ira L. Apparatus for extracting bone marrow
US6066296A (en) * 1997-09-23 2000-05-23 Array Medical, Inc. Sample addition, reagent application, and testing chamber
DE10064005A1 (en) * 2000-12-21 2002-07-04 Ivoclar Vivadent Ag filling
US6641394B2 (en) * 2001-08-13 2003-11-04 Ormco Corporation Fluid material delivery devices and methods
US6846314B2 (en) 1997-07-01 2005-01-25 Ira L. Shapira Method and apparatus for extracting bone marrow
US20050131459A1 (en) * 2002-06-12 2005-06-16 Radi Medical Systems Ab Closure device
WO2005122943A2 (en) 2004-06-14 2005-12-29 Discus Dental Impressions, Inc. Apparatus for evacuation of root canal
US20060110710A1 (en) * 2001-03-28 2006-05-25 Schemmer Jurgen H Endodontic ozone therapy
US20060171617A1 (en) * 2003-07-22 2006-08-03 Cross Rodney A Non-contacting face seals and thrust bearings
US20070244425A1 (en) * 2006-03-29 2007-10-18 Pond Gary J Irrigation and aspiration handpiece device
CN100391415C (en) 2006-01-16 2008-06-04 武汉大学 X-ray contrast medium transport device in root-canal
EP1938771A1 (en) * 2006-12-29 2008-07-02 Clifford J. Ruddle Cannula for a combined dental irrigator and vacuum device
US20090111068A1 (en) * 2007-10-30 2009-04-30 Martinez Daniel L Irrigation and Aspiration Device
US20100190133A1 (en) * 2007-10-30 2010-07-29 Martinez Daniel L Irrigation and aspiration device
US8308758B2 (en) 2002-06-12 2012-11-13 Radi Medical Systems Ab Closure device
US9433725B2 (en) 2011-12-23 2016-09-06 Alcon Research, Ltd. Combined coaxial and bimanual irrigation/aspiration apparatus
US9839738B2 (en) 2013-06-06 2017-12-12 Novartis Ag Transformer irrigation/aspiration device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1189735A (en) * 1915-08-26 1916-07-04 Kate T Quintin Dental injector and extractor.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1189735A (en) * 1915-08-26 1916-07-04 Kate T Quintin Dental injector and extractor.

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0201119A1 (en) * 1985-04-18 1986-11-12 FARO FABBRICA APPARECCHIATURE RAZIONALI ODONTOIATRICHE S.p.A. Apparatus for performing root canal therapy in dentistry
US4993947A (en) * 1987-07-16 1991-02-19 Meditec S.A. Equipment for the treatment of dental roots
US5066232A (en) * 1989-10-04 1991-11-19 Biomedic S.R.L. Method of removing pulp with an alkaline product
US6110176A (en) * 1997-07-01 2000-08-29 Shapira; Ira L. Methods for extracting bone marrow
US5913859A (en) * 1997-07-01 1999-06-22 Shapira; Ira L. Apparatus for extracting bone marrow
US6846314B2 (en) 1997-07-01 2005-01-25 Ira L. Shapira Method and apparatus for extracting bone marrow
US6066296A (en) * 1997-09-23 2000-05-23 Array Medical, Inc. Sample addition, reagent application, and testing chamber
DE10064005A1 (en) * 2000-12-21 2002-07-04 Ivoclar Vivadent Ag filling
US20060110710A1 (en) * 2001-03-28 2006-05-25 Schemmer Jurgen H Endodontic ozone therapy
US7270544B2 (en) * 2001-03-28 2007-09-18 Curozone Ireland Limited Endodontic ozone therapy
US6641394B2 (en) * 2001-08-13 2003-11-04 Ormco Corporation Fluid material delivery devices and methods
US20040048226A1 (en) * 2001-08-13 2004-03-11 Ormco Corporation Fluid material delivery devices and methods
US20050131459A1 (en) * 2002-06-12 2005-06-16 Radi Medical Systems Ab Closure device
US8088143B2 (en) * 2002-06-12 2012-01-03 Radi Medical Systems Ab Closure device
US8308758B2 (en) 2002-06-12 2012-11-13 Radi Medical Systems Ab Closure device
US8827705B2 (en) * 2003-03-13 2014-09-09 Ormco Corporation Apparatus for evacuation of root canal
US20120034579A1 (en) * 2003-03-13 2012-02-09 Discus Dental, Llc Apparatus for evacuation of root canal
US20170196658A1 (en) * 2003-03-13 2017-07-13 Ormco Corporation Apparatus for evacuation of root canal
US9872748B2 (en) 2003-03-13 2018-01-23 Ormco Corporation Apparatus for evacuation of root canal
US20060171617A1 (en) * 2003-07-22 2006-08-03 Cross Rodney A Non-contacting face seals and thrust bearings
US7654535B2 (en) 2003-07-22 2010-02-02 Cross Manufacturing Company (1938) Limited Non-contacting face seals and thrust bearings
US20080032259A1 (en) * 2004-06-14 2008-02-07 Schoeffel G J Apparatus for Evacuation of Root Canal
WO2005122943A2 (en) 2004-06-14 2005-12-29 Discus Dental Impressions, Inc. Apparatus for evacuation of root canal
US20080160481A1 (en) * 2004-06-14 2008-07-03 Discus Dental, Llc Apparatus for Evacuation of Root Canal
EP1755480A2 (en) * 2004-06-14 2007-02-28 Discus Dental Impressions, Inc. Apparatus for evacuation of root canal
EP1755480A4 (en) * 2004-06-14 2012-01-11 Discus Dental Llc Apparatus for evacuation of root canal
CN100391415C (en) 2006-01-16 2008-06-04 武汉大学 X-ray contrast medium transport device in root-canal
US20070244425A1 (en) * 2006-03-29 2007-10-18 Pond Gary J Irrigation and aspiration handpiece device
US20080160480A1 (en) * 2006-12-29 2008-07-03 Clifford J. Ruddle Cannula For A Combined Dental Irrigator and Vacuum Device
US8128401B2 (en) * 2006-12-29 2012-03-06 Clifford J. Ruddle Cannula for a combined dental irrigator and vacuum device
EP1938771A1 (en) * 2006-12-29 2008-07-02 Clifford J. Ruddle Cannula for a combined dental irrigator and vacuum device
WO2009058828A1 (en) * 2007-10-30 2009-05-07 Martinez Daniel L Irrigation and aspiration device
US20090111068A1 (en) * 2007-10-30 2009-04-30 Martinez Daniel L Irrigation and Aspiration Device
US20100190133A1 (en) * 2007-10-30 2010-07-29 Martinez Daniel L Irrigation and aspiration device
US9433725B2 (en) 2011-12-23 2016-09-06 Alcon Research, Ltd. Combined coaxial and bimanual irrigation/aspiration apparatus
US9839738B2 (en) 2013-06-06 2017-12-12 Novartis Ag Transformer irrigation/aspiration device

Similar Documents

Publication Publication Date Title
US3459188A (en) Paracentesis stylet catheter
US3559643A (en) Catheter placement unit
US3356089A (en) Injection needle guide
US3537451A (en) Intravenous catheter unit with releasable inserter means
US3352306A (en) Intravenous catheter assembly
US3589368A (en) Postsurgical tubes with capped proximal end
US3459184A (en) Intravenous catheter placement unit
US3055361A (en) Intravenous catheters
US3433216A (en) Self-evacuating fluid sampling device
US4246902A (en) Surgical cutting instrument
US4880412A (en) Tube insertion apparatus
US6287114B1 (en) Disposable anesthesia delivery system with shortened outer sleeve and inner solid drill
US3703174A (en) Method and apparatus for catheter injection
US4769003A (en) Wound irrigation splashback shield
US4692140A (en) Lavage/suction tip with dual splash shield
US4807625A (en) Membrane puncturing aspirator with drainage shield
US4925447A (en) Aspirator without partition wall for collection of bodily fluids including improved safety and efficiency elements
US6273715B1 (en) Disposable anesthesia delivery system with shortened outer sleeve and inner hollow drill
US6162202A (en) Flexible syringe needle
US4846809A (en) Needle tip protective device
US5352205A (en) Bloodless insertion catheter assembly
US2945496A (en) Dental instrument for immobilizing tissue
US3777743A (en) Endometrial sampler
US2893395A (en) Medical assembly and unit for liquid transfer
US5591389A (en) Method for making disposable tubular device