US3308819A - Anesthetic device - Google Patents

Anesthetic device Download PDF

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Publication number
US3308819A
US3308819A US32899963A US3308819A US 3308819 A US3308819 A US 3308819A US 32899963 A US32899963 A US 32899963A US 3308819 A US3308819 A US 3308819A
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Prior art keywords
cannula
conduit
tube
anesthetic
spurs
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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
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Leon J Arp
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University of Iowa Research Foundation (UIRF)
Iowa State University Research Foundation (ISURF)
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University of Iowa Research Foundation (UIRF)
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/01Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/02Holding devices, e.g. on the body
    • A61M25/04Holding devices, e.g. on the body in the body, e.g. expansible
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M19/00Local anaesthesia; Hypothermia

Description

March 14, 1967 L. J. ARP

ANESTHETIC DEVICE Filed Dec. 9, 1963 i 5m i a J KN wfflw mm 2 w J m R Q ,3

Z Mow v d fl United States Patent O 3,308,819 ANESTHETIC DEVICE Leon J. Arp, Ames, Iowa, assignor to Iowa State University Research Foundation, Inc., Ames, Iowa, a corporation of Iowa Filed Dec. 9, 1963, Ser. No. 328,999 3 Claims. (Cl. 128215) This invention relates to an anesthetic device, and, more particularly, to a catheter useful in the practice of cervical anesthesia.

In the labor period preceding childbirth, the cervix area is anesthetized, the anesthetic lasting for about one hour. At the present time, the block is delivered into the cervix area with a metal needle, and after the expiration of the dosage, the insertion procedure must be repeated. Because of the additional danger of an infection and the time and circumstances involved, it is desirable to be able to leave the needle in place so that additional anesthetic may be given whenever needed. However, a standard hypodermic needle cannot be left in place, even if a method were devised to maintain the proper one-half inch insertion depth, because of the potential danger to the infant by the sharp point during the delivery process.

The characteristics of the anesthetic delivery conduit meeting the above-described requirements pose a dilemma. If the conduit is rigid enough to remain immobilized, there is potential danger to the infant. On the other hand, if the conduit is made flexible or yielding, there is the possibility of loss of the conduit, with the attendant possibility of infection through repeated insertions, and, in fact, failure to achieve the principal objective of the conduit. It is, therefore, an important object of this invention to provide a solution to the dilemma just described through the provision of a flexible plastic-type conduit similar to that used in catheters and further characterized by unique means for preventing accidental withdrawal, but which coact with the catheter to permit deliberate withdrawal with a minimum of danger and further with minimum danger to the infant.

Another object of the invention is to provide a flexible catheter for use in conjunction with a hypodermic cannula in cervical anesthesia wherein the catheter is equipped with unique integral spurs adapted to be folded into an alternative position so as to facilitate removal of the catheter at the end of the use period.

Still another object is to provide a unique procedure for the administration of cervical anesthesia employing a novel catheter-like device for delivering the anesthetic to the cervix.

Other objects and advantages of the invention may be seen in the details of construction and operation set down in this specification.

The invention is explained in conjunction with an illustrative embodiment in the accompanying drawing, in which FIG. 1 is an elevational view, partially in dotted line, of a syringe equipped with the inventive catheter-like conduit;

FIG. 2 is a perspective view, on enlarged scale, of the conduit of FIG. 1;

FIG. 3 is a sectional view taken along the line 3-3 of FIG. 2;

FIG. 4 is a fragmentary sectional view taken along the sight line 4-4 applied to FIG. 3; and

FIG. 5 is an elevational view of the insertive parts of FIG. 1 but in exploded form.

In the illustration given and with particular reference to FIG. 1, the numeral designates generally a hypodermic syringe equipped with the usual barrel 11 terminating in a pointed cannula 12 and also equipped with Patented Mar. 14, 1967 a plunger 13 and finger-supporting portions 14. Arranged in ensleeved relation over the cannula 12 is the catheter-like conduit generally designated 15 and which can be seen in larger scale in FIG. 2 and exploded view in FIG. 5. The distal end of the conduit 15 is tapered as at 16 (see also FIG. 4). The conduit 15 is itself ensleeved by a penetration-limiting cannula 17, each of the cannulae being equipped with adapters as at 12a and 17a, respectively Additionally, the cannula 17 has a penetration-limiting hub 17b.

Intermediate the conduit ends are provided a plurality of spurs as at 18 and 19, which outstand from the outer wall 20 of the conduit 15. The conduit 15 is also equipped with an inner wall or bore 21, and the conduit 15 may be advantageously constructed of 0.027" ID. (#22) polyvinyl chloride or Teflon tubing.

The spurs 18 and 19 are seen to be spaced from, but adjacent to, the distal end 16, and are circumferentially spaced about the outer wall 20. Because of the thinness of the tube wall constituting the conduit 15, the spurs may be provided by slashes as at 18a and 19a, which may or may not extend completely through the tube wall (compare 18a and 19a in FIG. 4). Optimally, the slashes 18a and 19a defining the spurs 18 and 19 occupy a portion of the tube periphery more than and less than so as to substantially not interfere with the integrity of the conduit 15. The bottom of the slash is smooth or rounded as at 18b in FIG. 4. The round bottom can be obtained by making the cut with a hot wire, thereby making the cut by melting or vaporizing the plastic.

In the operation of the invention, the usual charge of anesthetic is placed within the barrel 11 of the hypodermic syringe 10 and the cannulae 12 and 17 directed toward the spot of administration, the catheter-like conduit 15 being positioned as seen in FIG. 1. After the anesthetic charge is delivered, the syringe 10 equipped with the cannulae 12 and 17 is removed both from the cervical region and the conduit 15, leaving the latter in place in the tissue to the proper depth. This depth is of the order of /2", and is maintained through the provision of the integral spur means provided adjacent the distal end of the conduit 15, the remaining 5 /2 or so of the conduit 15 being smooth. Any inadvertent movement against the conduit 15 will not result in its displacement, inasmuch as the spurs 18 and 19 serve as anchors. Ultimately, the conduit 15 is removed, after subsequent administrations of anesthetic if the same are called for, merely by pulling axially on the conduit 15, whereupon the spurs 18 and 19 fold over to the configuration indicated in dotted line and designated by the numeral 18c in FIG. 4. At this time, the infant has been delivered and the cervix is still anesthetized, so that there is no pain attendant on the removal of the conduit 15. Further, the folding over of the spurs 18 and 19 results in only a slight enlargement of the channel developed during insertion of the hypodermic cannnula 12.

On the other hand, during insertion, the spurs 18 and 19 fold into positions of conformity with the outer wall 20 so as to preclude any undesirable enlargement of the channel prior to the time the anesthetic is administered.

The use of the heated wire for providing the spurs 18 and 19 relieves the stresses which would otherwise be present at the apex of each slash, tending to disrupt or tear the spur. It will be appreciated that the hot wire technique can be utilized by molding to develop the same type of strainless configuration. This also permits the development of alternative configurations such as molded concentric rings.

While in the foregoing specification a detailed description of an embodiment of the invention has been set down for the purpose of explanation, many variations in the details herein given may be made by those skilled in the art without departing from the spirit and scope of the invention.

I claim:

1. In combination, a hypodermic syringe equipped with a pointed cannula for the delivery of anesthetic, a unitary flexible plastic tube ensleeved about said cannula, said tube having integral spur means positioned adjacent the end of said cannula efiective to anchor said tube in position in cervical tissue when the cannula is removed from the tube.

2. The combination of claim 1 in which said cannula extends beyond the end of said tube.

3. In combination, a hypodermic syringe equipped with a first cannula having a pointed end for the delivery of anesthetic, a unitary flexible plastic tube ensleeved about said first cannula and terminating before said pointed end, and a second cannula ensleeved on said tube andterminating in a penetration-limiting hub before the end of said tube, the portion of said tube extending beyond said second cannula having integral spur means effective to anchor said tube in position in cervical tissue when said first and second cannulae are withdrawn from said tube.

References Cited by the Examiner UNITED STATES PATENTS 2,740,404 4/1956 Kohl 128-215 2,828,744 4/1958 Hirsh etal 12s 221 3,123,077 3/1964 Alcamo 12s 332.5

FOREIGN PATENTS 586,018 12/1924 France.

ROBERT E. MORGAN, Acting Primary Examiner.

D. L. TRULUCK, RICHARD A. GAUDET, Examiners.

Claims (1)

1. IN COMBINATION, A HYPODERMIC SYRINGE EQUIPPED WITH A POINTED CANNULA FOR THE DELIVERY OF ANESTHETIC, A UNITARY FLEXIBLE PLASTIC TUBE ENSLEEVED ABOUT SAID CANNULA, SAID TUBE HAVING INTEGRAL SPUR MEANS POSITIONED ADJACENT THE END OF SAID CANNULA EFFECTIVE TO ANCHOR SAID TUBE IN POSITION IN CERVICAL TISSUE WHEN THE CANNULA IS REMOVED FROM THE TUBE.
US3308819A 1963-12-09 1963-12-09 Anesthetic device Expired - Lifetime US3308819A (en)

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Cited By (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3487826A (en) * 1966-09-06 1970-01-06 Charles A Barefoot Electromagnetic catheter blood flow probe
US3506007A (en) * 1967-07-24 1970-04-14 Henkin Melvyn Lane Catheter-needle
US3508545A (en) * 1967-11-16 1970-04-28 Dow Corning Catheter placement unit for paracervical anesthesia
US3521640A (en) * 1967-12-07 1970-07-28 Jane T Carey Surgical apparatus for use with a diseased lung or the like and related method
US3598119A (en) * 1970-02-02 1971-08-10 Charles A White Continuous paracervical anesthesia method and device
US3635223A (en) * 1969-12-02 1972-01-18 Us Catheter & Instr Corp Embolectomy catheter
US3665916A (en) * 1968-09-30 1972-05-30 Tokyo Shibaura Electric Co Catheter type semiconductor radiation detector
US3675639A (en) * 1970-05-11 1972-07-11 Hugo S Cimber Device for and method of temporary sterilizing a female
US3896804A (en) * 1972-11-24 1975-07-29 Astra Sjuco Ab Catheter for submucous administration of local anesthetics in obtaining paracervical block
US3938529A (en) * 1974-07-22 1976-02-17 Gibbons Robert P Indwelling ureteral catheter
US3951132A (en) * 1973-05-11 1976-04-20 Investors In Ventures, Inc. Implant and implanting method
FR2473890A1 (en) * 1980-01-23 1981-07-24 Telectronics Pty Ltd of medical electrode conductor
FR2506596A1 (en) * 1981-06-02 1982-12-03 Telectronics Pty Ltd Driver electrode for pacemaker
US4432757A (en) * 1980-05-09 1984-02-21 Davis Jr Richard C Indwelling urethral catheter
US4545374A (en) * 1982-09-03 1985-10-08 Jacobson Robert E Method and instruments for performing a percutaneous lumbar diskectomy
US4592356A (en) * 1984-09-28 1986-06-03 Pedro Gutierrez Localizing device
WO1988006864A1 (en) * 1987-03-20 1988-09-22 National Standard Company Localization needle assembly
US4995863A (en) * 1986-10-06 1991-02-26 Catheter Technology Corporation Catheter with slit valve
US5011478A (en) * 1989-01-31 1991-04-30 Cook Incorporation Recessed dilator-sheath assembly and method
US5160325A (en) * 1986-10-06 1992-11-03 C. R. Bard, Inc. Catheter with novel lumens shapes
US5292311A (en) * 1989-01-31 1994-03-08 Cook Incorporated Recessed dilator-sheath assembly and method
US5443484A (en) * 1992-06-16 1995-08-22 Loma Linda University Medical Center Trocar and method for endoscopic surgery
US5577993A (en) * 1992-06-16 1996-11-26 Loma Linda University Medical Center Trocar facilitator for endoscopic surgery and method of using the same
US5807349A (en) * 1997-03-10 1998-09-15 United States Surgical Corporation Catheter having valve mechanism
US6120480A (en) * 1997-10-28 2000-09-19 Medtronic Ave, Inc. Catheter introducer
US6344038B1 (en) * 1998-12-02 2002-02-05 Paul J. Weber Surgical anti-friction device
US20040024362A1 (en) * 2002-04-11 2004-02-05 Hugh Trout Stabilizing surgical delivery apparatus and method of use
US20050187578A1 (en) * 2002-09-20 2005-08-25 Rosenberg Michael S. Temporary retention device
US20070225651A1 (en) * 2006-03-09 2007-09-27 Rosenberg Michael S Anchor device and method
US20090093850A1 (en) * 2007-10-05 2009-04-09 Tyco Healthcare Group Lp Expanding seal anchor for single incision surgery
US20100016801A1 (en) * 2008-07-16 2010-01-21 Interrad Medical, Inc. Anchor Systems and Methods
US7695492B1 (en) * 1999-09-23 2010-04-13 Boston Scientific Scimed, Inc. Enhanced bleed back system
US20100204656A1 (en) * 2009-02-06 2010-08-12 Interrad Medical, Inc. System for anchoring medical devices
US20110152774A1 (en) * 2009-12-23 2011-06-23 Jose Luis Lopez Ophthalmic valved trocar cannula
US20110152775A1 (en) * 2009-12-23 2011-06-23 Jose Luis Lopez Ophthalmic valved trocar vent
US20110177975A1 (en) * 1996-02-09 2011-07-21 Cornell Research Foundation, Inc. Detection of nucleic acid sequence differences using the ligase detection reaction with addressable arrays
US20110295176A1 (en) * 2007-06-29 2011-12-01 Zarate Alfredo R Venous device
US8343108B2 (en) 2010-09-29 2013-01-01 Interrad Medical, Inc. Systems and methods for anchoring medical devices
USRE45638E1 (en) * 1996-12-02 2015-08-04 Abbott Cardiovascular Systems Inc. Apparatus for percutaneously performing myocardial revascularization having means for sensing tissue parameters and method of use
US9314596B2 (en) 2012-10-11 2016-04-19 Interrad Medical, Inc. Systems and methods for anchoring medical devices
US9550043B2 (en) 2012-12-13 2017-01-24 Interrad Medical, Inc. Systems and methods for anchoring medical devices
US9782567B2 (en) 2012-02-17 2017-10-10 Interrad Medical, Inc. Anchoring an intravenous cannula

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR586018A (en) * 1923-11-23 1925-03-13 intestinal probe
US2740404A (en) * 1955-02-21 1956-04-03 Gerald C Kohl Injection needle guide
US2828744A (en) * 1956-02-13 1958-04-01 Hirsch Sidney Flexible needle for use in intravenous therapy
US3123077A (en) * 1964-03-03 Surgical suture

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3123077A (en) * 1964-03-03 Surgical suture
FR586018A (en) * 1923-11-23 1925-03-13 intestinal probe
US2740404A (en) * 1955-02-21 1956-04-03 Gerald C Kohl Injection needle guide
US2828744A (en) * 1956-02-13 1958-04-01 Hirsch Sidney Flexible needle for use in intravenous therapy

Cited By (75)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3487826A (en) * 1966-09-06 1970-01-06 Charles A Barefoot Electromagnetic catheter blood flow probe
US3506007A (en) * 1967-07-24 1970-04-14 Henkin Melvyn Lane Catheter-needle
US3508545A (en) * 1967-11-16 1970-04-28 Dow Corning Catheter placement unit for paracervical anesthesia
US3521640A (en) * 1967-12-07 1970-07-28 Jane T Carey Surgical apparatus for use with a diseased lung or the like and related method
US3665916A (en) * 1968-09-30 1972-05-30 Tokyo Shibaura Electric Co Catheter type semiconductor radiation detector
US3635223A (en) * 1969-12-02 1972-01-18 Us Catheter & Instr Corp Embolectomy catheter
US3598119A (en) * 1970-02-02 1971-08-10 Charles A White Continuous paracervical anesthesia method and device
US3675639A (en) * 1970-05-11 1972-07-11 Hugo S Cimber Device for and method of temporary sterilizing a female
US3896804A (en) * 1972-11-24 1975-07-29 Astra Sjuco Ab Catheter for submucous administration of local anesthetics in obtaining paracervical block
US3951132A (en) * 1973-05-11 1976-04-20 Investors In Ventures, Inc. Implant and implanting method
US3938529A (en) * 1974-07-22 1976-02-17 Gibbons Robert P Indwelling ureteral catheter
FR2473890A1 (en) * 1980-01-23 1981-07-24 Telectronics Pty Ltd of medical electrode conductor
US4432757A (en) * 1980-05-09 1984-02-21 Davis Jr Richard C Indwelling urethral catheter
FR2506596A1 (en) * 1981-06-02 1982-12-03 Telectronics Pty Ltd Driver electrode for pacemaker
US4545374A (en) * 1982-09-03 1985-10-08 Jacobson Robert E Method and instruments for performing a percutaneous lumbar diskectomy
US4592356A (en) * 1984-09-28 1986-06-03 Pedro Gutierrez Localizing device
US4995863A (en) * 1986-10-06 1991-02-26 Catheter Technology Corporation Catheter with slit valve
US5160325A (en) * 1986-10-06 1992-11-03 C. R. Bard, Inc. Catheter with novel lumens shapes
WO1988006864A1 (en) * 1987-03-20 1988-09-22 National Standard Company Localization needle assembly
US4799495A (en) * 1987-03-20 1989-01-24 National Standard Company Localization needle assembly
US5011478A (en) * 1989-01-31 1991-04-30 Cook Incorporation Recessed dilator-sheath assembly and method
US5292311A (en) * 1989-01-31 1994-03-08 Cook Incorporated Recessed dilator-sheath assembly and method
US5443484A (en) * 1992-06-16 1995-08-22 Loma Linda University Medical Center Trocar and method for endoscopic surgery
US5577993A (en) * 1992-06-16 1996-11-26 Loma Linda University Medical Center Trocar facilitator for endoscopic surgery and method of using the same
US20110177975A1 (en) * 1996-02-09 2011-07-21 Cornell Research Foundation, Inc. Detection of nucleic acid sequence differences using the ligase detection reaction with addressable arrays
USRE45638E1 (en) * 1996-12-02 2015-08-04 Abbott Cardiovascular Systems Inc. Apparatus for percutaneously performing myocardial revascularization having means for sensing tissue parameters and method of use
US5807349A (en) * 1997-03-10 1998-09-15 United States Surgical Corporation Catheter having valve mechanism
US6120480A (en) * 1997-10-28 2000-09-19 Medtronic Ave, Inc. Catheter introducer
US6344038B1 (en) * 1998-12-02 2002-02-05 Paul J. Weber Surgical anti-friction device
US7695492B1 (en) * 1999-09-23 2010-04-13 Boston Scientific Scimed, Inc. Enhanced bleed back system
US20040024362A1 (en) * 2002-04-11 2004-02-05 Hugh Trout Stabilizing surgical delivery apparatus and method of use
US20070106330A1 (en) * 2002-09-20 2007-05-10 Interrad Medical, Inc. Temporary retention device
US9884168B2 (en) 2002-09-20 2018-02-06 Interrad Medical, Inc. Temporary retention device
US8715295B2 (en) 2002-09-20 2014-05-06 Interrad Medical, Inc. Temporary retention device
US20050187578A1 (en) * 2002-09-20 2005-08-25 Rosenberg Michael S. Temporary retention device
US8252004B2 (en) 2002-09-20 2012-08-28 Interrad Medical, Inc. Temporary retention device
US7931658B2 (en) 2002-09-20 2011-04-26 Interrad Medical, Inc. Temporary retention device
US9227040B2 (en) 2002-09-20 2016-01-05 Interrad Medical, Inc. Temporary retention device
US20110172607A1 (en) * 2002-09-20 2011-07-14 Interrad Medical, Inc. Temporary Retention Device
US7935127B2 (en) 2002-09-20 2011-05-03 Interrad Medical, Inc. Temporary retention device
US20070225651A1 (en) * 2006-03-09 2007-09-27 Rosenberg Michael S Anchor device and method
US8771232B2 (en) 2006-03-09 2014-07-08 Interrad Medical, Inc. Anchor device and method
US8016794B2 (en) * 2006-03-09 2011-09-13 Interrad Medical, Inc. Anchor device and method
US8016813B2 (en) 2006-03-09 2011-09-13 Interrad Medical, Inc. Anchor device and method
US20090326470A1 (en) * 2006-03-09 2009-12-31 Interrad Medical, Inc. Anchor Device and Method
US9381323B2 (en) 2006-03-09 2016-07-05 Interrad Medical, Inc. Anchor device and method
US20110295176A1 (en) * 2007-06-29 2011-12-01 Zarate Alfredo R Venous device
US20090093850A1 (en) * 2007-10-05 2009-04-09 Tyco Healthcare Group Lp Expanding seal anchor for single incision surgery
US9474518B2 (en) 2007-10-05 2016-10-25 Covidien Lp Expanding seal anchor for single incision surgery
US8795326B2 (en) 2007-10-05 2014-08-05 Covidien Lp Expanding seal anchor for single incision surgery
US9937327B2 (en) 2008-07-16 2018-04-10 Interrad Medical, Inc. Anchor systems and methods
US8444603B2 (en) 2008-07-16 2013-05-21 Interrad Medical, Inc. Anchor systems and methods
US8038653B2 (en) 2008-07-16 2011-10-18 Interrad Medical, Inc. Anchor systems and methods
US9056187B2 (en) 2008-07-16 2015-06-16 Interrad Medical, Inc. Anchor systems and methods
US20100016801A1 (en) * 2008-07-16 2010-01-21 Interrad Medical, Inc. Anchor Systems and Methods
US8579864B2 (en) 2008-07-16 2013-11-12 Interrad Medical, Inc. Anchor systems and methods
US9656045B2 (en) 2009-02-06 2017-05-23 Interrad Medical, Inc. System for anchoring medical devices
US8974434B2 (en) 2009-02-06 2015-03-10 Interrad Medical, Inc. System for anchoring medical devices
US8986257B2 (en) 2009-02-06 2015-03-24 Interrad Medical, Inc. System for anchoring medical devices
US20100204656A1 (en) * 2009-02-06 2010-08-12 Interrad Medical, Inc. System for anchoring medical devices
US8328764B2 (en) 2009-02-06 2012-12-11 Interrad Medical, Inc. System for anchoring medical devices
US8277418B2 (en) 2009-12-23 2012-10-02 Alcon Research, Ltd. Ophthalmic valved trocar cannula
US8679064B2 (en) 2009-12-23 2014-03-25 Alcon Research, Ltd. Ophthalmic valved trocar cannula
US20110152774A1 (en) * 2009-12-23 2011-06-23 Jose Luis Lopez Ophthalmic valved trocar cannula
US8343106B2 (en) 2009-12-23 2013-01-01 Alcon Research, Ltd. Ophthalmic valved trocar vent
US20110152775A1 (en) * 2009-12-23 2011-06-23 Jose Luis Lopez Ophthalmic valved trocar vent
US8343108B2 (en) 2010-09-29 2013-01-01 Interrad Medical, Inc. Systems and methods for anchoring medical devices
US9381322B2 (en) 2010-09-29 2016-07-05 Interrad Medical, Inc. Systems and methods for anchoring medical devices
US9662476B2 (en) 2010-09-29 2017-05-30 Interrad Medical, Inc. Systems and methods for anchoring medical devices
US8956329B2 (en) 2010-09-29 2015-02-17 Interrad Medical, Inc. Systems and methods for anchoring medical devices
US9782567B2 (en) 2012-02-17 2017-10-10 Interrad Medical, Inc. Anchoring an intravenous cannula
US9907934B2 (en) 2012-10-11 2018-03-06 Interrad Medical, Inc. Systems and methods for anchoring medical devices
US9314596B2 (en) 2012-10-11 2016-04-19 Interrad Medical, Inc. Systems and methods for anchoring medical devices
US9789288B2 (en) 2012-12-13 2017-10-17 Interrad Medical, Inc. Systems and methods for anchoring medical devices
US9550043B2 (en) 2012-12-13 2017-01-24 Interrad Medical, Inc. Systems and methods for anchoring medical devices

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