US3863641A - Thoracic drainage catheter - Google Patents

Thoracic drainage catheter Download PDF

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Publication number
US3863641A
US3863641A US400798A US40079873A US3863641A US 3863641 A US3863641 A US 3863641A US 400798 A US400798 A US 400798A US 40079873 A US40079873 A US 40079873A US 3863641 A US3863641 A US 3863641A
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Prior art keywords
tube
catheter
thoracic
mandrel
thoracic drainage
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Expired - Lifetime
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US400798A
Inventor
Ioan Pop D Popa
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INSTITUTUL PENTRU CREATIE STIINTIFICA SI TECHNICA
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INSTITUTUL PENTRU CREATIE STIINTIFICA SI TECHNICA
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES 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
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
    • A61M25/0068—Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
    • A61M25/007—Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES 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
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/84—Drainage tubes; Aspiration tips
    • A61M1/85—Drainage tubes; Aspiration tips with gas or fluid supply means, e.g. for supplying rinsing fluids or anticoagulants
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES 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
    • A61M25/00—Catheters; Hollow probes
    • A61M25/10—Balloon catheters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES 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
    • A61M2210/00—Anatomical parts of the body
    • A61M2210/10—Trunk
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES 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
    • A61M2210/00—Anatomical parts of the body
    • A61M2210/10—Trunk
    • A61M2210/101—Pleural cavity

Definitions

  • ABSTRACT A thoracic drainage catheter (tamponade proof) used in the thoracic surgery for permitting the evacuation of clots and secretions, provided at one extremity to be placed inside the patients intrathoracic zone with lateral orifices and at the other with a tube connected to a vacuum apparatus.
  • the present invention refers to a thoracic drainage catheter (tamponade) used in thoracic surgery and especially in heart surgery postoperatively or after a traumatism in the thorax in order'to remove blood, secretions and air which accummulate in the thorax generating acute cardiorespiratory insufficiency and sometimes even death.
  • thoracic drainage catheter tamponade
  • a thoracic drainage catheter consisting of simple aspira tion tubes having lateral orifices at the end which is introduced into the thoracic cavity.
  • the other end is connected to a vacuum apparatus meant to exhaust postoperatively formed liquids, including clots and tissue detritus.
  • the tubes cannot be drained by evacuation and must be periodically and manually drawn out, a difficult manoeuvre which can be performed only with the exterior tubes, not with the intrathoracic inner tubes.
  • One object of the invention is that of permitting the evacuation of clots which can obturate the catheter during the postoperative treatment, by flushing the catheter with heparine solution.
  • Another object of the invention is that of securing the continuous run of the catheter without any need of medical catheter extraction from the thoracic cavity while flushing.
  • the position of the catheter (being radioopaque) can be easily detected.
  • the thoracic drainage catheter is provided at one ex- I tremity with lateral orifices, the other extremity being sectional view of the thoracic drainage catheter, ac-- cording to the invention.
  • the thoracic drainage catheter consists of a transparent elastic tube 1 having at the extremity lb to be placed inside the patients intrathoracic zone a plurality of orifices a.
  • the other extremity 1a of the tube 1, without lateral orifices, is connected to a tube through which the secretions drain to the collection flask of the aspiration pump.
  • the tube 1 has at the place of connection with the vacuum apparatus, in order to shut that extremity, a protection tampon or plug 2.
  • a semi-rigid mandrel 3, which constitutes the manipulating handle of the catheter is introduced through a lateral orifice into the tube 1.
  • the handle will interlock to the sound by way of an extensible silicone rubber finger 3a acting as a guide for the return.
  • the main tube 1 has a semirigid rubber tube 6 extended with an elastic tube 7 having at each extremity a hose coupling 8, both tubes 6 and 7 serving to guide the mandrel 3.
  • the mandrel 3 is connected at the extremity gliding through the tube 7 to a syringe (not represented in the figure) by way of an adaptor 9.
  • a rigid tube 10 provided with an adaptor 11 connects the catheter to a graduated cylinder (not represented in the FIGURE) for the purpose of liquid flushing.
  • the catheter operates as follows:
  • the sterile aspiration tubes 1 (usually two or even three of them) are placed with the extremity provided with the lateral orifices inside the area which needs draining (inside the precardiac zone or inside the pleural cavity).
  • the tubes are fixid on skin by way of an elastic extensible link for cranial fastening.
  • the opposite extremities of the tubes are connected to the electrical vacuum pump for the drainage of the air-liquid postoperative excretions from the thorax.
  • the vacuum apparatus With the object of periodically cleaning the catheter, the vacuum apparatus must be disconnected by applying a clamp on the exhaust tube 1 of the apparatus, the balloonet 4 on the mandrel must be inflated by pushing the syringe piston, connected at q and the mandrel must be pulled up to a position in the non-apertured zone; as a result of inflating and moving moving the balloonet 4, the tube area lb provided with lateral orifices, is isolated and, as a result of the upward piston-like movement of the balloonet 4 on the inner part of the tube 1, the clots in the lumen are drawn out towards the other extremity of the tube to be more easily discharged by the flushing action.
  • the flushing of the tube with heparine solution helps the evacuation and especially the evacuation of the clots drawn by the mandrel; at the same time it maintains the hypo-coagulability of the blood which comes into touch with the system of aspiration tubes.
  • a self cleaning catheter for thoracic drainage comprising:
  • a catheter tube body having an end provided with lateral orifices and adapted to be received in a thoracic cavity, and another end having means connectable to a suction source;

Abstract

A thoracic drainage catheter (tamponade proof) used in the thoracic surgery for permitting the evacuation of clots and secretions, provided at one extremity to be placed inside the patient''s intrathoracic zone with lateral orifices and at the other with a tube connected to a vacuum apparatus.

Description

United States Patent [191 Popa [ THORACIC DRAINAGE CATHETER [75] Inventor: loan Pop D. Popa, Tirgu Mures,
Romania [73] Assignee: Institutul Pentru Creatie Stiintifica Si Technica, Bucharest, Romania 22 Filed: Sept. 26, 1973 21 App1.No.:400,798
[30] Foreign Application Priority Data Sept, 29, 1972 Romania 72375 [52] US. Cl. 128/350 R, 128/246 [51] Int. Cl A61m 27/00 [58] Field of Search 128/246, 348, 349, 350,
[56] References Cited UNITED STATES PATENTS 1,510,212 9/1924 Du Bois 138/93 UX [451 Feb. 4, 1975 2,378,367 6/1945 2,898,917 8/1959 2,919,697 1/1960 2,930,378 3/1960 3,190,679 6/1965 3,392,722 7/1968 Jorgensen 128/1 3,395,710 8/1968 Stratton et a1. 128/350 R 3,564,103 2/1971 Brachschob 138/93 X Primary Examiner-Aldrich F. Medbery Attorney, Agent, or Firm1(ar1 F. Ross; Herbert Dubno [57] ABSTRACT A thoracic drainage catheter (tamponade proof) used in the thoracic surgery for permitting the evacuation of clots and secretions, provided at one extremity to be placed inside the patients intrathoracic zone with lateral orifices and at the other with a tube connected to a vacuum apparatus.
1 Claim, 1 Drawing Figure PATENTEB FEB M975 i mum Wag/zigza THORACIC DRAINAGE CATHETER The present invention refers to a thoracic drainage catheter (tamponade) used in thoracic surgery and especially in heart surgery postoperatively or after a traumatism in the thorax in order'to remove blood, secretions and air which accummulate in the thorax generating acute cardiorespiratory insufficiency and sometimes even death.
BACKGROUND OF THE INVENTION To avoid this shortcoming surgical techniques use a thoracic drainage catheter consisting of simple aspira tion tubes having lateral orifices at the end which is introduced into the thoracic cavity.
The other end is connected to a vacuum apparatus meant to exhaust postoperatively formed liquids, including clots and tissue detritus.
The disadvantage of these catheters is that, after a period of time of 4 to 6 hours, and sometimes after 24 hours, their openings are obturated by the clots and the tissue detritus.
The tubes cannot be drained by evacuation and must be periodically and manually drawn out, a difficult manoeuvre which can be performed only with the exterior tubes, not with the intrathoracic inner tubes.
At the same time, such a handling can lead, by return of the partially exhausted secretions, to the risk of infection taking into account that the sterility decreases with the increase of the distance between the patient and the evacuation flask.
OBJECTS OF THE INVENTION One object of the invention is that of permitting the evacuation of clots which can obturate the catheter during the postoperative treatment, by flushing the catheter with heparine solution.
Another object of the invention is that of securing the continuous run of the catheter without any need of medical catheter extraction from the thoracic cavity while flushing.
The invention offers the following advantages:
it permits the execution of the detritus-clearing manouvre under sterile conditions;
it is of a simple construction and permits the visualization of the evacuation process of the clots all through the tube; and
the position of the catheter (being radioopaque) can be easily detected.
SUMMARY OF THE INVENTION The thoracic drainage catheter is provided at one ex- I tremity with lateral orifices, the other extremity being sectional view of the thoracic drainage catheter, ac-- cording to the invention.
SPECIFIC DESCRIPTION According to the invention, the thoracic drainage catheter consists of a transparent elastic tube 1 having at the extremity lb to be placed inside the patients intrathoracic zone a plurality of orifices a. The other extremity 1a of the tube 1, without lateral orifices, is connected to a tube through which the secretions drain to the collection flask of the aspiration pump. At this other end, the tube 1 has at the place of connection with the vacuum apparatus, in order to shut that extremity, a protection tampon or plug 2.
A semi-rigid mandrel 3, which constitutes the manipulating handle of the catheter is introduced through a lateral orifice into the tube 1.
The radioopaque mandrel 3, placed in front of the lateral orifices inside the tube 1, is provided with a bulging balloonet 4, which acts as a piston and which is fastened at both extremities by tow hoses 5.
Atone extremity the handle will interlock to the sound by way of an extensible silicone rubber finger 3a acting as a guide for the return.
The main tube 1 has a semirigid rubber tube 6 extended with an elastic tube 7 having at each extremity a hose coupling 8, both tubes 6 and 7 serving to guide the mandrel 3. The mandrel 3 is connected at the extremity gliding through the tube 7 to a syringe (not represented in the figure) by way of an adaptor 9.
A rigid tube 10 provided with an adaptor 11 connects the catheter to a graduated cylinder (not represented in the FIGURE) for the purpose of liquid flushing.
According to the invention the catheter operates as follows:
The sterile aspiration tubes 1 (usually two or even three of them) are placed with the extremity provided with the lateral orifices inside the area which needs draining (inside the precardiac zone or inside the pleural cavity).
The tubes are fixid on skin by way of an elastic extensible link for cranial fastening.
The opposite extremities of the tubes are connected to the electrical vacuum pump for the drainage of the air-liquid postoperative excretions from the thorax.
With the object of periodically cleaning the catheter, the vacuum apparatus must be disconnected by applying a clamp on the exhaust tube 1 of the apparatus, the balloonet 4 on the mandrel must be inflated by pushing the syringe piston, connected at q and the mandrel must be pulled up to a position in the non-apertured zone; as a result of inflating and moving moving the balloonet 4, the tube area lb provided with lateral orifices, is isolated and, as a result of the upward piston-like movement of the balloonet 4 on the inner part of the tube 1, the clots in the lumen are drawn out towards the other extremity of the tube to be more easily discharged by the flushing action.
stopping the balloonet and the mandrel, they are fixed with a clamp and afterwards they are flushed with liquid (heparine solution) from the graduated-cylinder attached to 11. In order to be able tobalance of the thorax losses, drained into sucking flask, the ballon is deflated and returned to the bottom and the residual heparine is permitted to flow down to the orfice area.
The flushing of the tube with heparine solution helps the evacuation and especially the evacuation of the clots drawn by the mandrel; at the same time it maintains the hypo-coagulability of the blood which comes into touch with the system of aspiration tubes.
We claim:
1. A self cleaning catheter for thoracic drainage comprising:
a catheter tube body having an end provided with lateral orifices and adapted to be received in a thoracic cavity, and another end having means connectable to a suction source;
means for selectively closing the tube comprising a the mandrel in its inflated state.
I a: t I:

Claims (1)

1. A self cleaning catheter for thoracic drainage comprising: a catheter tube body having an end provided with lateral orifices and adapted to be received in a thoracic cavity, and another end having means connectable to a suction source; means for selectively closing the tube comprising a semi-rigid tubular mandrel extending laterally into said tube and having an inflatable end and sized to slide along the wall of said tube along said orifices; and a syringe connected to said tubular mandrel for distending and collapsing thE inflatable end thereof; a rigid tube extending laterally from said catheter tube and communicating with the interior thereof having means for being connected to a graduated cylinder for flushing the catheter tube with a heparine solution when the tube is closed by the end of the mandrel in its inflated state.
US400798A 1972-09-29 1973-09-26 Thoracic drainage catheter Expired - Lifetime US3863641A (en)

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RO72375A RO57165A2 (en) 1972-09-29 1972-09-29

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Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4173981A (en) * 1977-05-23 1979-11-13 University Of Utah Cannula for arterial and venous bypass cannulation
FR2595252A1 (en) * 1986-03-06 1987-09-11 Imtec Sa SURGICAL DRAIN
US4762125A (en) * 1986-03-07 1988-08-09 The University Of Texas System Balloon-tipped suction catheter
US4894056A (en) * 1987-06-01 1990-01-16 Bommarito Alexander A Method and apparatus for clearing occluded lumens of enteral feeding tubes
US5188618A (en) * 1991-05-03 1993-02-23 Thomas Bruce W Thrombus-mobilizing thoracostomy tube
US5628733A (en) * 1994-03-03 1997-05-13 Izi Corporation Surgical drain
WO2002003866A2 (en) * 2000-07-07 2002-01-17 Andreas Pein Medizintechnik Gmbh Surgical device for the removal of tissue cells from a biological structure
US20040267186A1 (en) * 2003-06-27 2004-12-30 Dextradeur Alan J. System and method for clearing an implanted catheter that is connected to a shunt
US20050251093A1 (en) * 2004-05-06 2005-11-10 Hassan Abou-Kansoul Hand mounted surgical aspiration device
US20080281250A1 (en) * 2005-05-10 2008-11-13 Marvin Bergsneider Self-Clearing Catheter for Clinical Implantation
US20090270838A1 (en) * 2008-04-24 2009-10-29 Medtronic Vascular, Inc. Catheter Flushing Mandrel
US20130150701A1 (en) * 2011-11-08 2013-06-13 Sara Budar Multi-lumen thoracic catheter and uses thereof
US20140257243A1 (en) * 2013-03-11 2014-09-11 Covidien Lp Controlling catheter flow
RU2557427C1 (en) * 2014-01-09 2015-07-20 Общество с ограниченной ответственностью "СКБМТ Инжиниринг" Draining device
US20150374889A1 (en) * 2014-06-27 2015-12-31 Harrison M. Lazarus Surgical kits for body cavity drainage and related methods
US9604033B2 (en) 2014-06-27 2017-03-28 Harrison M. Lazarus Body cavity drainage devices with locking devices and related methods
US9821097B2 (en) 2014-06-27 2017-11-21 Merit Medical Systems, Inc. Body cavity drainage devices including drainage tubes having inline portions and related methods
US10029036B2 (en) 2014-06-27 2018-07-24 Merit Medical Systems, Inc. Placement tools for body cavity drainage devices and related methods
US10232150B2 (en) 2010-03-11 2019-03-19 Merit Medical Systems, Inc. Body cavity drainage devices and related methods
US10286183B2 (en) 2015-11-25 2019-05-14 Merit Medical Systems, Inc. Steerable sheath catheter and methods of use
US20210077775A1 (en) * 2019-09-18 2021-03-18 Heraeus Medical Gmbh Device for temporary, local administration of fluids
US10994076B1 (en) 2019-07-25 2021-05-04 Circulatech, Llc Methods and devices to prevent obstructions in medical tubes
US11559662B2 (en) 2018-04-13 2023-01-24 Merit Medical Systems, Inc. Steerable drainage devices

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1510212A (en) * 1922-11-29 1924-09-30 Bois Rhesa G Du Device for opening stopped drainpipes
US2378367A (en) * 1942-08-25 1945-06-12 Irene D Ahern Apparatus for inflating and deflating an expansible plug by means of a liquid content
US2898917A (en) * 1958-04-07 1959-08-11 American Cystoscope Makers Inc Surgical retaining device
US2919697A (en) * 1958-10-08 1960-01-05 Kim Se Kyong Catheters
US2930378A (en) * 1957-09-09 1960-03-29 Davol Rubber Co Abdominal drainage tube
US3190679A (en) * 1963-05-20 1965-06-22 Frank P Lester Hose connector
US3392722A (en) * 1965-07-29 1968-07-16 Roger L. Jorgensen Post-operative surgical valve
US3395710A (en) * 1965-06-14 1968-08-06 Robert A. Stratton Gastro-intestinal tube with inflatable weight releasing means
US3564103A (en) * 1968-09-28 1971-02-16 Knapsack Ag Shutoff device for hollow electrodes

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1510212A (en) * 1922-11-29 1924-09-30 Bois Rhesa G Du Device for opening stopped drainpipes
US2378367A (en) * 1942-08-25 1945-06-12 Irene D Ahern Apparatus for inflating and deflating an expansible plug by means of a liquid content
US2930378A (en) * 1957-09-09 1960-03-29 Davol Rubber Co Abdominal drainage tube
US2898917A (en) * 1958-04-07 1959-08-11 American Cystoscope Makers Inc Surgical retaining device
US2919697A (en) * 1958-10-08 1960-01-05 Kim Se Kyong Catheters
US3190679A (en) * 1963-05-20 1965-06-22 Frank P Lester Hose connector
US3395710A (en) * 1965-06-14 1968-08-06 Robert A. Stratton Gastro-intestinal tube with inflatable weight releasing means
US3392722A (en) * 1965-07-29 1968-07-16 Roger L. Jorgensen Post-operative surgical valve
US3564103A (en) * 1968-09-28 1971-02-16 Knapsack Ag Shutoff device for hollow electrodes

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4173981A (en) * 1977-05-23 1979-11-13 University Of Utah Cannula for arterial and venous bypass cannulation
FR2595252A1 (en) * 1986-03-06 1987-09-11 Imtec Sa SURGICAL DRAIN
EP0236853A1 (en) * 1986-03-06 1987-09-16 Imtec S.A. Surgical drain
US4762125A (en) * 1986-03-07 1988-08-09 The University Of Texas System Balloon-tipped suction catheter
US4894056A (en) * 1987-06-01 1990-01-16 Bommarito Alexander A Method and apparatus for clearing occluded lumens of enteral feeding tubes
US5188618A (en) * 1991-05-03 1993-02-23 Thomas Bruce W Thrombus-mobilizing thoracostomy tube
US5628733A (en) * 1994-03-03 1997-05-13 Izi Corporation Surgical drain
WO2002003866A2 (en) * 2000-07-07 2002-01-17 Andreas Pein Medizintechnik Gmbh Surgical device for the removal of tissue cells from a biological structure
WO2002003866A3 (en) * 2000-07-07 2002-03-28 Pein Andreas Medizintech Gmbh Surgical device for the removal of tissue cells from a biological structure
US20040092987A1 (en) * 2000-07-07 2004-05-13 Andreas Pein Surgical device for removal of tissue cells from
US20040267186A1 (en) * 2003-06-27 2004-12-30 Dextradeur Alan J. System and method for clearing an implanted catheter that is connected to a shunt
US7094214B2 (en) 2003-06-27 2006-08-22 Codman & Shurtleff, Inc. System and method for clearing an implanted catheter that is connected to a shunt
US20050251093A1 (en) * 2004-05-06 2005-11-10 Hassan Abou-Kansoul Hand mounted surgical aspiration device
US20080281250A1 (en) * 2005-05-10 2008-11-13 Marvin Bergsneider Self-Clearing Catheter for Clinical Implantation
US8002763B2 (en) * 2008-04-24 2011-08-23 Medtronic Vascular, Inc. Catheter flushing mandrel
US20090270838A1 (en) * 2008-04-24 2009-10-29 Medtronic Vascular, Inc. Catheter Flushing Mandrel
US20100324537A1 (en) * 2008-04-24 2010-12-23 Medtronic Vascular, Inc. Catheter Flushing Mandrel
US10232150B2 (en) 2010-03-11 2019-03-19 Merit Medical Systems, Inc. Body cavity drainage devices and related methods
US20130150701A1 (en) * 2011-11-08 2013-06-13 Sara Budar Multi-lumen thoracic catheter and uses thereof
US9463300B2 (en) 2013-03-11 2016-10-11 Covidien Lp Controlling catheter flow
US20140257243A1 (en) * 2013-03-11 2014-09-11 Covidien Lp Controlling catheter flow
US9138567B2 (en) * 2013-03-11 2015-09-22 Covidien Lp Controlling catheter flow
RU2557427C1 (en) * 2014-01-09 2015-07-20 Общество с ограниченной ответственностью "СКБМТ Инжиниринг" Draining device
US9604033B2 (en) 2014-06-27 2017-03-28 Harrison M. Lazarus Body cavity drainage devices with locking devices and related methods
US9649415B2 (en) * 2014-06-27 2017-05-16 Harrison M. Lazarus Surgical kits for body cavity drainage and related methods
US9821097B2 (en) 2014-06-27 2017-11-21 Merit Medical Systems, Inc. Body cavity drainage devices including drainage tubes having inline portions and related methods
US10029036B2 (en) 2014-06-27 2018-07-24 Merit Medical Systems, Inc. Placement tools for body cavity drainage devices and related methods
US20150374889A1 (en) * 2014-06-27 2015-12-31 Harrison M. Lazarus Surgical kits for body cavity drainage and related methods
US11058806B2 (en) 2014-06-27 2021-07-13 The Seaberg Company, Inc. Body cavity drainage devices including drainage tubes having inline portions and related methods
US10286183B2 (en) 2015-11-25 2019-05-14 Merit Medical Systems, Inc. Steerable sheath catheter and methods of use
US11559662B2 (en) 2018-04-13 2023-01-24 Merit Medical Systems, Inc. Steerable drainage devices
US10994076B1 (en) 2019-07-25 2021-05-04 Circulatech, Llc Methods and devices to prevent obstructions in medical tubes
US20210077775A1 (en) * 2019-09-18 2021-03-18 Heraeus Medical Gmbh Device for temporary, local administration of fluids

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