Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS3709211 A
Publication typeGrant
Publication dateJan 9, 1973
Filing dateJul 2, 1970
Priority dateJul 2, 1970
Publication numberUS 3709211 A, US 3709211A, US-A-3709211, US3709211 A, US3709211A
InventorsHawkins F
Original AssigneeHawkins F
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Diagnostic myelography needle
US 3709211 A
Abstract
A surgical needle for injecting and removing fluid material from channels of the human body such as the spinal canal. The needle is provided with a lumen closed by a stylus during insertion. The stylus is removed for permitting the injection of fluid and a second stylus smaller than the lumen and projecting beyond the end of the needle is inserted to prevent the body tissues from closing the lumen during aspiration of the injected fluids.
Images(1)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

I United States Patent 1 [111 I 3,709,21 1 Hawkins [451 Jan. 9, 1973 s41 DIAGNOSTIC MYELOGRAPHY 958,854 5/1910 Bunn ..27/24 A NEEDLE 3,081,770 3/1963 Hunter..... .....l28/22l 2,850,007 9 1958 L' 1 ..l28 2 B [76] Inventor: Fred B. Hawkins, 5110 Courville, 2 30 03 341953 12 /221 Toledo, Ohio 43623 2,072,346 3/1937 Smith ..27/24 A [22] Filed: July 2, 1970 Primary Examiner-Kyle L. Howell PP 51,959 Attorney-Berman, Davidson and Berman 52 us. Cl. ..l28/2 A, 27/24 A, 128/2 F, [571 ABSTRACT 128/347 A surgical needle for injecting and removing fluid Int- Cl. 8 8 8 ..A61b material from channels of the human uch as [58] Field of Search-J28 B, 2 2 2 A, 205 spinal canal. The needle is provided with a lumen 128/221 5; 27/24 A closed by a stylus during insertion. The stylus is removed for permitting the injection of fluid and a [56] References Cited second stylus smaller than the lumen and projecting UNITED STATES PATENTS beyond the end of the needle is inserted to prevent the body tissues from closing the lumen during aspiration 3,175,554 3/1965 Stewart ..l28/2 B of the injected fluids. 1,391,464 9/1921 Degenhart ..27/24 A 2,674,777 4/1954 Davis ..27/24 A 3 Claims, 4 Drawing Figures DIAGNOSTIC MYELOGRAPHY NEEDLE BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to surgical needles and particularly to hollow needles which are used for injecting and aspirating fluids from the spinal canal.

Summary of the Invention The present invention is directed to a hollow needle normally closed by a stylus during insertion of the needle. The stylus is removed to permit the injection of fluids through the hollow needle and then a second stylus having a diameter substantially less than that of the lumen of the needle is inserted through the lumen to a point beyond the end of the needle to hold the body tissues away from the opening in the needle during aspiration to prevent the tissues from closing the lumen.

The primary object of the invention is to provide a hollow surgical needle for injecting and aspirating fluids from the body having means to prevent the tissues of the body from closing the needle during aspiration.

Other objects and advantages will become apparent in the following specification when considered in the light of the attached drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side elevation of the invention shown partially broken away and in section for convenience of illustration;

FIG. 2 is a side elevation of a stylus;

FIG. 3 is an enlarged fragmentary vertical sectional view of the needle tip with the stylus of FIG. 2 in place therein; and

FIG. 4 is a bottom plan view of the structure of FIG. 3.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to the drawings in detail wherein like reference characters indicate like parts throughout the several figures the reference numeral indicates generally a hollow surgical needle constructed in accordance with the invention.

The hollow surgical needle 10 includes a head 11 having an elongate hollow tubular shank l2 integrally formed therewith and extending outwardly therefrom. An axial bore 13 is formed in the head 11 communicating with the hollow shank 12. The hollow shank 12 has its terminal end truncated at 14 to form a sharp needle edge 15 to cut the body tissues while inserting the needle 10 therein.

A stylus 16 is formed to exactly fit the opening through the hollow shank 12 and has its lower end truncated at 17 to exactly align with the truncation 14 of the shank 12. .The stylus 16 extends to a tapered plug 18 at the upper end thereof which fits into a tapered socket 19 in the hub 20 on the head 11. A guide key 21 formed on the plug 18 fits into a notch 22 in the hub 20 so as to align the truncated end 17 with the truncated end 14 of the shank 12. A transversely extending hub 23 is formed on the head ll 1 and has a axial bore 24 extending therethrough communicating with the bore 13 of the head 11. A locking air tight cap 25 is secured to 25 is in place on the hub 23. v i

A second stylus generally indicated at 26 includes a tapered plug 27 having its exterior shape and size identical to the tapered plug 18 and carrying thereon a key 28, identical to the key 21. A rod 29 is integrally secured to the plug 27 and extends axially outwardly therefrom. The rod 29 has a diameter substantially less than that of the bore 13 and the hollow center of the tubular shank 12 as can be clearly seen in FIG. 3.

The lower end of the rod 29 is reverted to form a loop 30 having a maximum lateral dimension slightly less than the diameter of the bore of the hollow shank 12. The length of the rod 29 is such that when the key 28 is fully engaged in the notch 22 of the hub 20 the loop 30 will project slightly past the needle edge 15 on the shank 12. (See FIG. 3) In forming the loop 30 on the rod 29 the rod is reverted tightly upon itself and is secured with metal bonding such as silver solder welding or the like.

In the use and operation of the invention the following description refers specifically to a myelographic procedure in which opaque oil is injected into the spinal canal and then removed by aspiration. It should be understood that the invention may also be used in the injection and or aspiration of fluids from other points in the body where obstruction of the needle upon aspiration is a problem. The procedure followed in use of the invention is to first insert the stylus 16 in the shank 12 to the position illustrated in FIG. 1 and then close the bore 24 with the cap 25. The needle 10 is then inserted into the body until the truncated end 14 of the shank 12 enters the spinal canal. The stylus 16 is then removed from the shank 12 and a syringe (not shown) is used to inject opaque oil through the hub 20, bore 13 and hollow shank 12 into thespinal canal. The stylus 26 is then inserted in the shank 12 until the loop 30 extends beyond the cutting edge 15 of the shank l2 and the cap 25 isremoved to permit the hub 23 to be connected to an aspirating pump (not shown). The funtion of the loop 30 projecting beyond the end of the shank 12 is to hold the nerve roots or meninges away from the opening in the shank 12 so that when aspirating suction is applied to the shank 12 the meninges will not seal against the opening of the needle and prevent the flow of the opaque oil upwardly through the shank 12. The absence of the loop 30 permits the meninges to engage the end of the needle causing pain to the patient and preventing the complete removal of the opaque oil. It should be noted that the rod 29 and loop '30 loosely fit in the bore of the tubular shank 12 so that fluid may flow easily thereby during aspiration.

Having thus described the preferred embodiment of the invention it should be understood that numerous structural modifications and adaptations may be resorted to without departing from the spirit of the invention. g

What is claimed is:

1. A diagnostic myelography needle for injecting fluids into and aspirating fluids from the spinal canal of a living patient, comprising a generally cylindrical head, said head having an axial bore extending therethrough, a socket formed in one end of said head communicating with the axial bore in said head, a hub integrally formed with said head and extending laterally therefrom, said hub having a closable bore extending therethrough communicating with the bore in said head, an elongate cylindrical shank formed on the end of said head opposite said socket, said shank having an axial bore extending therethrough communicating with the bore in said head, an angularly truncated sharpened cutting needle edge on the end of saidshank opposite said head, a plug slidably seated in said socket, cooperating interfitting means on said plug and socket to align said plug and socket and prevent relative rotation there'between, an elongate rod fixed on said plug to extend through the bore in said shank, said rod having a diameter substantially less than the diameter of the bore in said shank, a restraining element fixed to the distal end of said rod and extending slightly beyond said needle edge of the shank to hold nerve roots and meninges away from the open needle end of said shank and prevent clogging thereof by soft tissues, whereby to reduce pain to the patient during aspiration of fluids used for diagnosis of inter-spinal lesions.

2. A myelography needle as claimed in claim 1, wherein said restraining element comprises a single loop formed on the distal end of said rod, said loop having its major lateral dimension slightly le ssthan the diameter of the bore of said shank, said rod and said loop having a length such that upon seal seating of said plug in said socket the terminal end of said loop will extend slightly beyond the truncated end of said shank;

3. A device as claimed in claim 1, wherein the cooperating interfitting means on said plug and socket for aligning and preventing relative rotation therebetween comprises a notch formed in said socket and a guide key formed in said plug for engagement in said notch.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US958854 *Oct 25, 1909May 24, 1910Oron L BunnSelf-cleaning trocar.
US1391464 *Nov 8, 1920Sep 20, 1921George J DegenhartDrainage-tube
US2072346 *Oct 4, 1934Mar 2, 1937Ward R SmithDrainage tube
US2630803 *May 12, 1950Mar 10, 1953Baran Eustachius ODouble pneumothoracic needle
US2674777 *Apr 4, 1952Apr 13, 1954Howard M DavisVenous drain tube assembly for embalmers
US2850007 *May 31, 1956Sep 2, 1958American Cyanamid CoBiopsy device
US3081770 *Sep 21, 1960Mar 19, 1963John M HunterSurgical instrument
US3175554 *Mar 26, 1963Mar 30, 1965Becton Dickinson CoSplit biopsy needle
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4414983 *Aug 19, 1981Nov 15, 1983John M. EvansMedico-surgical instruments
US4771772 *Oct 27, 1986Sep 20, 1988Medtronic, Inc.Robotic implantable medical device and/or component restoration system
US5030213 *Aug 21, 1989Jul 9, 1991Rumberger William ECatheter router and method of use
US5284474 *Sep 30, 1992Feb 8, 1994Adair Edwin LloydTrochar system for laparoscopy
US5396899 *Apr 28, 1993Mar 14, 1995Duke UniversitySpinal puncture fluid collection apparatus
US5498249 *Mar 24, 1994Mar 12, 1996Radius International, Inc.Catheter stylet
US7066914Mar 16, 2005Jun 27, 2006Bird Products CorporationCatheter having a tip with an elongated collar
US7094200Apr 7, 2005Aug 22, 2006Katzman Scott SVisualizing ablation system
US7120487Jul 18, 2003Oct 10, 2006Nelson David ACatheter system and method for administering regional anesthesia to a patient
US8088119Aug 14, 2007Jan 3, 2012Laurimed, LlcMethods and devices for treating tissue
US8277437Apr 2, 2009Oct 2, 2012Laurimed, LlcMethod of accessing two lateral recesses
US8292909Jul 16, 2012Oct 23, 2012Laurimed, LlcDevices and methods for cutting tissue
US8298254Jun 30, 2011Oct 30, 2012Laurimed, LlcDevices and methods for cutting and evacuating tissue
US8376931Apr 7, 2005Feb 19, 2013Orthopaedic Development, LlcVisualizing ablation cannula
US8414587Aug 31, 2007Apr 9, 2013Laurimed, LlcStyli used to position device for carrying out selective discetomy
US8657842Jul 12, 2013Feb 25, 2014Laurimed, LlcDevices and methods for cutting tissue
US8685052Jan 4, 2013Apr 1, 2014Laurimed, LlcDevices and methods for cutting tissue
US8815099Jan 21, 2014Aug 26, 2014Laurimed, LlcDevices and methods for filtering and/or collecting tissue
US8840632Oct 22, 2012Sep 23, 2014Laurimed, LlcDevices and methods for cutting tissue
WO1994024928A1 *Apr 15, 1994Nov 10, 1994Warren J StrittmatterSpinal puncture fluid collection apparatus
WO2000028889A1 *Nov 16, 1998May 25, 2000Costa John GBody access system
Classifications
U.S. Classification600/573, 27/24.1, 604/267
International ClassificationA61B17/34, A61M1/00
Cooperative ClassificationA61M1/008, A61B2017/347, A61B17/3401
European ClassificationA61M1/00T, A61B17/34B