US2642874A - Instrument for treating prostate glands - Google Patents

Instrument for treating prostate glands Download PDF

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Publication number
US2642874A
US2642874A US22974851A US2642874A US 2642874 A US2642874 A US 2642874A US 22974851 A US22974851 A US 22974851A US 2642874 A US2642874 A US 2642874A
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conduit
device
end
cannula
figure
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Wilmer B Keeling
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Wilmer B Keeling
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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
    • A61M25/10Balloon catheters
    • A61M25/1011Multiple balloon catheters

Description

Patented June 23,K4 1953A UNITEo 'l' if, Fot 'r LANDS' Keeling,v Mehari-in, Va.

- AimftiJ'unet, 1951, serial 1510.229343 4 claims. (ci. 12tlg-349) This invention relates to animprovedinstrument for :supplying r'n'e'dicinalI substances to and thedrainng of fluid from .theprostate glandand the area surrounding said gland. A. 'l The primary object'of this invention vide a means for supplyingfmedicinal substances under pressure to and retaining the same in contact with vthe prostate gland and area surrounding the same. The device is designed for instilling medicinal substances into ducts and through the ducts of the prostate gland for any desired period of time, while preventing the medicinal substances from passing into the bladder. The device will also dilate the urethral wall so that there will be a dilation of the ducts leading off into the prostate gland and the seminal vesicles, thus facilitating the passage of the medicinal liquid into these'areas andthe passage of pus or like matterfrom these areas. The device can also be used to provide gentle pressure on the prostate gland from the interior of the urethra to assist inthe removal of fluids or like matter from the prostate gland and to be used in connection with prostatic massage for that purpose.

Another important object of this invention isl to provide a device of the character described which includes inflatable means which can seal off a particular area of the urethra so that medicinal substances can be delivered under pressure to the sealed off area or a vacuum may be applied to the device for the removal of fluid only from the sealed off area.

A further object of this'invention is to provide a device of the character vdescribed which is simple in construction, easy to use and very efficient for its intended purposes. i

These, together with various ancillary objects and features of the invention which will later become apparent as the following description proceeds, are attained by the device, a preferred embodiment of which has been illustrated by way of example only in the accompanying drawings,

' wherein:

Figure 1 is a longitudinal sectional view through the device; l g

Figure 2 is an enlarged fragmentary longitudinal sectional view of that portion of the device having the inflatable means;

Figure 3 is a sectional view taken substantially on the plane of section line 3-3 of Figure 2;

Figure 4 is a sectional view taken substantially on the plane of section line 4--4 of Figure 2; land Figure 5 is a sectional view taken` substantially on the plane of section line .5 5 of Figure 1.

Specific reference is now made to the drawings.` IVA-n the several views in the accompanying drawings and infthe following specification ref- -erence -`characters indicate corresponding elevments throughout. f v

y The'present device comprises an elongated cannula I0 of the usual flexible material, thedistal end bengrrounded as at ,I2 whereastheopposite end is `forked or bifurcated to provide two furcations I4 and IE. Extending lengthwise through the cannula and through the furcation I4'is a] f conduit or passage I8 of relatively small diameter adapted to convey air or other gases under pressure, the conduit terminating adjacent the distal end of the cannula.

In the vicinity of the distal end of the cannula, f

- thesame is provided with a pair of longitudinally spaced annular grooves 20 and 22 which communicate with the conduit I8 by means of ports 24 and 26. An elastic band 28, fabricated of suitable rubber or plastic, and which is substantially channel vin cross section, as shown 'in the drawings, is cemented vor otherwise fixedly secured within each groove in such a manner that nor.

` the penis in the urethra until the grooves 24 and 26 reach the region to be treated. The furcation I4 is then attached by a suitable adapter to a source of air or gas under pressure whereupon the bands lor sleeves 28 are inflated to assume the positions shown in dotted lines in Figure 1. This seals olf a desired area between the grooves and the furcation I6 mayithen be attached to a source of medicinal fluid for delivery of the same through the conduit 34 to the delivery opening 36 between thegrooves. The medicinal fluid may From the foregoing, the construction and opery ation of the device will be readily understood and further explanation is believed to be unnecessary. However, since numerous modications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction shown and described, and accordingly, all suitable modications and equivalents may be resorted to, falling within the scope of the appended claims.

Having described the invention, what is claimed as new is:

1. An instrument for treating the prostate gland, seminal vesicles and the male posterior f urethra comprising an elongated cannularhaving a rounded somewhat blunt distal closed end adapted for unhampered insertion in the patients urethra and a bifurcated trailingv end, a rst conduit extending longitudinally-.through said cannula and one of the furcations and terminating at one end adjacent to said distal end,`-saidv conduit being adapted to receive and conduct gas under pressure, longitudinally spaced resiliently inflatable sleeves carried by said cannula and communicating with said conduit, saidsleeves being expandable under gas pressure to .enlarge the effective diameter of said cannula at .two longitudinally spaced positions, and a second medicinal fluid-conveying conduit extending longitudinally through said cannula and the other furcation, said second conduit terminating at one end in a discharge opening located midway between said spaced inflatable sleeves.

2. The combination of claim 1 wherein said iniiatable sleeves are characterized by a pair of longitudinally spaced annular grooves adjacent the distal end of said cannula, a port communi- .eating each of said grooves with said rst conduit, and an elastic endless band secured in each of said grooves.

3. The combination of claim 2 wherein said 4bands l .flush with the outer surface of said cannula when deated.

4. The combination of claim 3 wherein the diameter of said first conduit is substantially smaller than that of said second conduit.

WILMER. B. KEELING.

References ACited in the me .of this patent UNITED STATES IP A'ITIEIN'IJSy

US2642874A 1951-06-04 1951-06-04 Instrument for treating prostate glands Expired - Lifetime US2642874A (en)

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Cited By (58)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2799273A (en) * 1955-03-22 1957-07-16 Vincent J Oddo Haemostatic catheter
US2849001A (en) * 1955-10-17 1958-08-26 Vincent J Oddo Haemostatic catheter
US2849002A (en) * 1956-03-12 1958-08-26 Vincent J Oddo Haemostatic catheter
US2936760A (en) * 1956-09-10 1960-05-17 Davol Rubber Co Positive pressure catheter
US3112748A (en) * 1960-04-04 1963-12-03 Pharmaseal Lab Surgical tube
US3173418A (en) * 1961-01-10 1965-03-16 Ostap E Baran Double-wall endotracheal cuff
US3417744A (en) * 1966-03-15 1968-12-24 Mishkin Sidney Catheter for selective bronchography
US3435826A (en) * 1964-05-27 1969-04-01 Edwards Lab Inc Embolectomy catheter
US3812841A (en) * 1972-08-21 1974-05-28 L Isaacson Urethra magnetic valve structure
US3977408A (en) * 1974-11-01 1976-08-31 Mackew Allan H Prosthetic catheter
US4177815A (en) * 1978-02-01 1979-12-11 The Kendall Company Catheter balloon structure
US4193392A (en) * 1977-09-23 1980-03-18 Barnett Gordon R Method for removing ova from animals
US4368739A (en) * 1979-07-18 1983-01-18 Nelson Jr Richard L Long intestinal catheter
US4573966A (en) * 1981-11-24 1986-03-04 Schneider Medintag Ag Method and apparatus for removing and/or enlarging constricted areas in vessels conducting body fluids
US4636195A (en) * 1982-04-02 1987-01-13 Harvey Wolinsky Method and apparatus for removing arterial constriction
US4660560A (en) * 1985-05-30 1987-04-28 The Beth Israel Hospital Association Method for treating obstructive prostatism
US4693704A (en) * 1982-10-12 1987-09-15 Sumitomo Bakelite Company Limited Cervical canal catheter
US4762125A (en) * 1986-03-07 1988-08-09 The University Of Texas System Balloon-tipped suction catheter
US4878901A (en) * 1986-10-10 1989-11-07 Sachse Hans Ernst Condom catheter, a urethral catheter for the prevention of ascending infections
US4886496A (en) * 1988-02-04 1989-12-12 Conoscenti Craig S Bronchoscopic balloon tipped catheter and method of making the same
WO1990001969A1 (en) * 1988-08-24 1990-03-08 Slepian Marvin J Biodegradable polymeric endoluminal sealing
US4909785A (en) * 1986-03-25 1990-03-20 American Medical Systems, Inc. Method for valving body fluids
US4983166A (en) * 1987-12-28 1991-01-08 Yoshiharu Yamawaki Balloon catheter and method of use of the same
US5041091A (en) * 1986-10-20 1991-08-20 Herring Malcolm B Kit and method for harvesting endothelial cells and inoculating a vascular prosthesis
US5188596A (en) * 1990-09-27 1993-02-23 Mentor Corporation Transparent prostate dilation balloon and scope
US5213577A (en) * 1989-12-22 1993-05-25 Michael Kratzer Device for examining the functions of the endothelium or the intima of blood vessels
US5263931A (en) * 1990-02-14 1993-11-23 Advanced Cardiovascular Systems, Inc. Balloon catheter for dilating a prostatic urethra
US5312430A (en) * 1986-12-09 1994-05-17 Rosenbluth Robert F Balloon dilation catheter
US5314443A (en) * 1990-06-25 1994-05-24 Meadox Medicals, Inc. Prostate balloon dilatation catheter
US5328471A (en) * 1990-02-26 1994-07-12 Endoluminal Therapeutics, Inc. Method and apparatus for treatment of focal disease in hollow tubular organs and other tissue lumens
US5397307A (en) * 1993-12-07 1995-03-14 Schneider (Usa) Inc. Drug delivery PTCA catheter and method for drug delivery
US5411479A (en) * 1988-10-21 1995-05-02 Bgh Medical Products Inc Cancer treatment and catheter for use in treatment
US5527336A (en) * 1986-12-09 1996-06-18 Boston Scientific Corporation Flow obstruction treatment method
US5554119A (en) * 1991-08-02 1996-09-10 Scimed Drug delivery catheter with manifold
US5575815A (en) * 1988-08-24 1996-11-19 Endoluminal Therapeutics, Inc. Local polymeric gel therapy
US5628770A (en) * 1995-06-06 1997-05-13 Urologix, Inc. Devices for transurethral thermal therapy
US5634946A (en) * 1988-08-24 1997-06-03 Focal, Inc. Polymeric endoluminal paving process
US5645528A (en) * 1995-06-06 1997-07-08 Urologix, Inc. Unitary tip and balloon for transurethral catheter
US5716325A (en) * 1990-03-02 1998-02-10 General Surgical Innovations, Inc. Arthroscopic retractors and method of using the same
WO1998033545A1 (en) * 1997-02-04 1998-08-06 Cook Urological Inc. Suprapubic drainage catheter
US5817046A (en) * 1997-07-14 1998-10-06 Delcath Systems, Inc. Apparatus and method for isolated pelvic perfusion
US5843156A (en) * 1988-08-24 1998-12-01 Endoluminal Therapeutics, Inc. Local polymeric gel cellular therapy
US5843144A (en) * 1995-06-26 1998-12-01 Urologix, Inc. Method for treating benign prostatic hyperplasia with thermal therapy
US5861021A (en) * 1996-06-17 1999-01-19 Urologix Inc Microwave thermal therapy of cardiac tissue
US5919163A (en) * 1997-07-14 1999-07-06 Delcath Systems, Inc. Catheter with slidable balloon
US6186146B1 (en) 1996-08-30 2001-02-13 Delcath Systems Inc Cancer treatment method
US6648911B1 (en) 2000-11-20 2003-11-18 Avantec Vascular Corporation Method and device for the treatment of vulnerable tissue site
US20040039331A1 (en) * 1998-12-03 2004-02-26 Gioacchino Coppi Endovascular system for the treatment of stenoses of the carotid and catheter for this system
EP1441779A2 (en) * 2001-10-17 2004-08-04 WIT IP Corporation CATHETERS WITH SUCTION CAPABILITY AND RELATED METHODS AND SYSTEMS FOR OBTAINING BIOSAMPLES i IN VIVO /i
US20050020976A1 (en) * 2003-06-18 2005-01-27 Terumo Kabushiki Kaisha Medical therapeutic apparatus
GB2405796A (en) * 2003-09-10 2005-03-16 Dajue Wang Intra-Urethral catheters
US8747439B2 (en) 2000-03-13 2014-06-10 P Tech, Llc Method of using ultrasonic vibration to secure body tissue with fastening element
US8808329B2 (en) 1998-02-06 2014-08-19 Bonutti Skeletal Innovations Llc Apparatus and method for securing a portion of a body
US8814902B2 (en) 2000-05-03 2014-08-26 Bonutti Skeletal Innovations Llc Method of securing body tissue
US8845699B2 (en) 1999-08-09 2014-09-30 Bonutti Skeletal Innovations Llc Method of securing tissue
US8845687B2 (en) 1996-08-19 2014-09-30 Bonutti Skeletal Innovations Llc Anchor for securing a suture
US9770238B2 (en) 2001-12-03 2017-09-26 P Tech, Llc Magnetic positioning apparatus
US9950138B2 (en) 2012-07-23 2018-04-24 University Of Utah Research Foundation Indwelling urinary catheter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2173527A (en) * 1937-02-23 1939-09-19 John D Agayoff Catheter or drainage tube
US2175726A (en) * 1938-11-26 1939-10-10 American Anode Inc Catheter for bronchospirometry
US2210744A (en) * 1939-01-17 1940-08-06 American Anode Inc Catheter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2173527A (en) * 1937-02-23 1939-09-19 John D Agayoff Catheter or drainage tube
US2175726A (en) * 1938-11-26 1939-10-10 American Anode Inc Catheter for bronchospirometry
US2210744A (en) * 1939-01-17 1940-08-06 American Anode Inc Catheter

Cited By (81)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2799273A (en) * 1955-03-22 1957-07-16 Vincent J Oddo Haemostatic catheter
US2849001A (en) * 1955-10-17 1958-08-26 Vincent J Oddo Haemostatic catheter
US2849002A (en) * 1956-03-12 1958-08-26 Vincent J Oddo Haemostatic catheter
US2936760A (en) * 1956-09-10 1960-05-17 Davol Rubber Co Positive pressure catheter
US3112748A (en) * 1960-04-04 1963-12-03 Pharmaseal Lab Surgical tube
US3173418A (en) * 1961-01-10 1965-03-16 Ostap E Baran Double-wall endotracheal cuff
US3435826A (en) * 1964-05-27 1969-04-01 Edwards Lab Inc Embolectomy catheter
US3417744A (en) * 1966-03-15 1968-12-24 Mishkin Sidney Catheter for selective bronchography
US3812841A (en) * 1972-08-21 1974-05-28 L Isaacson Urethra magnetic valve structure
US3977408A (en) * 1974-11-01 1976-08-31 Mackew Allan H Prosthetic catheter
US4193392A (en) * 1977-09-23 1980-03-18 Barnett Gordon R Method for removing ova from animals
US4177815A (en) * 1978-02-01 1979-12-11 The Kendall Company Catheter balloon structure
US4368739A (en) * 1979-07-18 1983-01-18 Nelson Jr Richard L Long intestinal catheter
US4573966A (en) * 1981-11-24 1986-03-04 Schneider Medintag Ag Method and apparatus for removing and/or enlarging constricted areas in vessels conducting body fluids
US4636195A (en) * 1982-04-02 1987-01-13 Harvey Wolinsky Method and apparatus for removing arterial constriction
US4693704A (en) * 1982-10-12 1987-09-15 Sumitomo Bakelite Company Limited Cervical canal catheter
US4660560A (en) * 1985-05-30 1987-04-28 The Beth Israel Hospital Association Method for treating obstructive prostatism
US4762125A (en) * 1986-03-07 1988-08-09 The University Of Texas System Balloon-tipped suction catheter
US4909785A (en) * 1986-03-25 1990-03-20 American Medical Systems, Inc. Method for valving body fluids
US4878901A (en) * 1986-10-10 1989-11-07 Sachse Hans Ernst Condom catheter, a urethral catheter for the prevention of ascending infections
US5041091A (en) * 1986-10-20 1991-08-20 Herring Malcolm B Kit and method for harvesting endothelial cells and inoculating a vascular prosthesis
US5312430A (en) * 1986-12-09 1994-05-17 Rosenbluth Robert F Balloon dilation catheter
US5527336A (en) * 1986-12-09 1996-06-18 Boston Scientific Corporation Flow obstruction treatment method
US5752971A (en) * 1986-12-09 1998-05-19 Boston Scientific Technology, Inc. Method of treating a flow obstruction
US5836951A (en) * 1986-12-09 1998-11-17 Boston Scientific Corporation Balloon dilation catheter
US4983166A (en) * 1987-12-28 1991-01-08 Yoshiharu Yamawaki Balloon catheter and method of use of the same
US4886496A (en) * 1988-02-04 1989-12-12 Conoscenti Craig S Bronchoscopic balloon tipped catheter and method of making the same
WO1990001969A1 (en) * 1988-08-24 1990-03-08 Slepian Marvin J Biodegradable polymeric endoluminal sealing
US6443941B1 (en) * 1988-08-24 2002-09-03 Endoluminal Therapeutics, Inc. Biodegradable polymeric endoluminal sealing process, apparatus and polymeric products for use therein
US5800538A (en) * 1988-08-24 1998-09-01 Endoluminal Therapeutics, Inc. Biodegradable polymeric endoluminal sealing process
US5674287A (en) * 1988-08-24 1997-10-07 Endoluminal Therapeutics, Inc. Biodegradable polymeric endoluminal sealing process, apparatus and polymeric product for use therein
US6699272B2 (en) 1988-08-24 2004-03-02 Endoluminal Therapeutics, Inc. Biodegradable polymeric endoluminal sealing process, apparatus and polymeric products for use therein
US20040024419A1 (en) * 1988-08-24 2004-02-05 Endoluminal Therapeutics, Inc. Biodegradable polymeric endoluminal sealing process, apparatus and polymeric products for use therein
US5749915A (en) * 1988-08-24 1998-05-12 Focal, Inc. Polymeric endoluminal paving process
US5749922A (en) * 1988-08-24 1998-05-12 Endoluminal Therapeutics, Inc. Biodegradable polymeric endoluminal sealing process, apparatus and polymeric products for use therein
US5575815A (en) * 1988-08-24 1996-11-19 Endoluminal Therapeutics, Inc. Local polymeric gel therapy
US5634946A (en) * 1988-08-24 1997-06-03 Focal, Inc. Polymeric endoluminal paving process
US5843156A (en) * 1988-08-24 1998-12-01 Endoluminal Therapeutics, Inc. Local polymeric gel cellular therapy
US5411479A (en) * 1988-10-21 1995-05-02 Bgh Medical Products Inc Cancer treatment and catheter for use in treatment
US5213577A (en) * 1989-12-22 1993-05-25 Michael Kratzer Device for examining the functions of the endothelium or the intima of blood vessels
US5263931A (en) * 1990-02-14 1993-11-23 Advanced Cardiovascular Systems, Inc. Balloon catheter for dilating a prostatic urethra
US5328471A (en) * 1990-02-26 1994-07-12 Endoluminal Therapeutics, Inc. Method and apparatus for treatment of focal disease in hollow tubular organs and other tissue lumens
US6287320B1 (en) 1990-02-26 2001-09-11 Endoluminal Therapeutics, Inc. Method and apparatus for treatment of focal disease in hollow tubular organs and other tissue lumens
US5662609A (en) * 1990-02-26 1997-09-02 Endoluminal Therapeutics, Inc. Method and apparatus for treatment of focal disease in hollow tubular organs and other tissue lumens
US5716325A (en) * 1990-03-02 1998-02-10 General Surgical Innovations, Inc. Arthroscopic retractors and method of using the same
US5314443A (en) * 1990-06-25 1994-05-24 Meadox Medicals, Inc. Prostate balloon dilatation catheter
US5188596A (en) * 1990-09-27 1993-02-23 Mentor Corporation Transparent prostate dilation balloon and scope
US5554119A (en) * 1991-08-02 1996-09-10 Scimed Drug delivery catheter with manifold
US5558642A (en) * 1991-08-02 1996-09-24 Scimed Life Systems, Inc. Drug delivery catheter
US5716340A (en) * 1991-08-02 1998-02-10 Scimed Life Systems, Inc. Blood perfusion catheter
US6290729B1 (en) 1992-03-25 2001-09-18 Endoluminal Therapeutics, Inc. Local polymeric gel cellular therapy
US5397307A (en) * 1993-12-07 1995-03-14 Schneider (Usa) Inc. Drug delivery PTCA catheter and method for drug delivery
US5628770A (en) * 1995-06-06 1997-05-13 Urologix, Inc. Devices for transurethral thermal therapy
US5645528A (en) * 1995-06-06 1997-07-08 Urologix, Inc. Unitary tip and balloon for transurethral catheter
US5843144A (en) * 1995-06-26 1998-12-01 Urologix, Inc. Method for treating benign prostatic hyperplasia with thermal therapy
US5861021A (en) * 1996-06-17 1999-01-19 Urologix Inc Microwave thermal therapy of cardiac tissue
US8845687B2 (en) 1996-08-19 2014-09-30 Bonutti Skeletal Innovations Llc Anchor for securing a suture
US6186146B1 (en) 1996-08-30 2001-02-13 Delcath Systems Inc Cancer treatment method
US6299598B1 (en) 1997-02-04 2001-10-09 Cook Urological, Incorporated Drainage catheter
WO1998033545A1 (en) * 1997-02-04 1998-08-06 Cook Urological Inc. Suprapubic drainage catheter
US5919163A (en) * 1997-07-14 1999-07-06 Delcath Systems, Inc. Catheter with slidable balloon
US5817046A (en) * 1997-07-14 1998-10-06 Delcath Systems, Inc. Apparatus and method for isolated pelvic perfusion
US8808329B2 (en) 1998-02-06 2014-08-19 Bonutti Skeletal Innovations Llc Apparatus and method for securing a portion of a body
US7384412B2 (en) 1998-12-03 2008-06-10 Invatec S.R.L. Endovascular system for the treatment of stenoses of the carotid and catheter for this system
US20050273051A1 (en) * 1998-12-03 2005-12-08 Invatec S.R.I Endovascular system for the treatment of stenoses of the carotid and catheter for this system
US7083594B2 (en) * 1998-12-03 2006-08-01 Invatec S.R.L. Endovascular system for the treatment of stenoses of the carotid and catheter for this system
US20040039331A1 (en) * 1998-12-03 2004-02-26 Gioacchino Coppi Endovascular system for the treatment of stenoses of the carotid and catheter for this system
US8845699B2 (en) 1999-08-09 2014-09-30 Bonutti Skeletal Innovations Llc Method of securing tissue
US8747439B2 (en) 2000-03-13 2014-06-10 P Tech, Llc Method of using ultrasonic vibration to secure body tissue with fastening element
US8814902B2 (en) 2000-05-03 2014-08-26 Bonutti Skeletal Innovations Llc Method of securing body tissue
US6648911B1 (en) 2000-11-20 2003-11-18 Avantec Vascular Corporation Method and device for the treatment of vulnerable tissue site
EP1441779A4 (en) * 2001-10-17 2008-01-16 Wit Ip Corp CATHETERS WITH SUCTION CAPABILITY AND RELATED METHODS AND SYSTEMS FOR OBTAINING BIOSAMPLES i IN VIVO /i
EP1441779A2 (en) * 2001-10-17 2004-08-04 WIT IP Corporation CATHETERS WITH SUCTION CAPABILITY AND RELATED METHODS AND SYSTEMS FOR OBTAINING BIOSAMPLES i IN VIVO /i
US9770238B2 (en) 2001-12-03 2017-09-26 P Tech, Llc Magnetic positioning apparatus
US7399290B2 (en) * 2003-06-18 2008-07-15 Terumo Kabushiki Kaisha Medical therapeutic apparatus
US20050020976A1 (en) * 2003-06-18 2005-01-27 Terumo Kabushiki Kaisha Medical therapeutic apparatus
GB2405796B (en) * 2003-09-10 2006-09-20 Dajue Wang Intra-urethral catheters
GB2405796A (en) * 2003-09-10 2005-03-16 Dajue Wang Intra-Urethral catheters
US7857807B2 (en) 2003-09-10 2010-12-28 Dajue Wang Intra-urethral catheters
US20070032780A1 (en) * 2003-09-10 2007-02-08 Dajue Wang Intra-urethral catheters
US9950138B2 (en) 2012-07-23 2018-04-24 University Of Utah Research Foundation Indwelling urinary catheter

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