US2498692A - Gastrointestinal tube - Google Patents

Gastrointestinal tube Download PDF

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Publication number
US2498692A
US2498692A US69143A US6914349A US2498692A US 2498692 A US2498692 A US 2498692A US 69143 A US69143 A US 69143A US 6914349 A US6914349 A US 6914349A US 2498692 A US2498692 A US 2498692A
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tube
pylorus
tip
intestine
passage
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US69143A
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Mains Marshall Paul
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J15/00—Feeding-tubes for therapeutic purposes
    • A61J15/0003—Nasal or oral feeding-tubes, e.g. tube entering body through nose or mouth
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J15/00—Feeding-tubes for therapeutic purposes
    • A61J15/0026—Parts, details or accessories for feeding-tubes
    • A61J15/0069—Tubes feeding directly to the intestines, e.g. to the jejunum
    • 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
    • A61M31/00—Devices for introducing or retaining media, e.g. remedies, in cavities of the body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J15/00—Feeding-tubes for therapeutic purposes
    • A61J15/0003—Nasal or oral feeding-tubes, e.g. tube entering body through nose or mouth
    • A61J15/0007—Nasal or oral feeding-tubes, e.g. tube entering body through nose or mouth inserted by using a guide-wire
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J15/00—Feeding-tubes for therapeutic purposes
    • A61J15/0026—Parts, details or accessories for feeding-tubes
    • A61J15/0073—Multi-lumen tubes
    • 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
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
    • A61M25/0133—Tip steering devices
    • A61M25/0138—Tip steering devices having flexible regions as a result of weakened outer material, e.g. slots, slits, cuts, joints or coils

Definitions

  • the finvention Ydescribedherein may ⁇ loe manufactu-red ⁇ and ius'edby -gorifor the :Government ,for governmental purposes, without payment to me of any froyalty thereon.
  • the present -invention relates tinal tubes adapted to "-be passed lthrough into the pylorus and thence kinto-the small-intestine for the purpose 4-of 'withdrawing intestinal contents and :for injecting .fuid material into the intestine.
  • One object oi the present invention is to provide a vgastro-intestinal tube which obviates the objections tothe present construction of tubes and which is passed easily through the stomach into the pylorus under fluoroscopic control.
  • a further object of the invention is to provide a gastro-intestinal tube which is provided with means for positively guiding the tube through the stomach into the pylorus.
  • a still further object oi the invention is to provide a gastro-intestinal tube upon which are provided means adapted to be grasped by the intestinal walls for propelling the tube through the pylorus into the intestine.
  • FIG. 1 is a diagrammatic View showing the improved tube of the present invention passing through the pylorus of the stomach into the small intestine.
  • Fig. 2 is fragmentary longitudinal sectional elevation of the distal end portion of the tube, with a fragment of the proximal end.
  • Fig. 3 is a view similar to Fig. 2, but showing the distal end of the tube ilexed for guiding the tube into the pylorus;
  • Fig. 4 is a side elevation of the tube shown in Figs. 2 and 3;
  • Fig, 5 is a transverse sectional elevation through the tube, taken on the line V-V of Fig. 2, looking in the direction o f the arrows;
  • the improved gastro-lintestinal tube of the'present invention comprises va 'proximal portion A and a -itlistal portion ⁇ B, the periphery of jthe proximal portion Abeing lcontinuously uninterrupted, while the distal portion-B yis characterized by an interrupted yperiphery due to oppositely aprojecting, relatively staggered projections or ears,'which will be referred ito further hereinafter.
  • the tube ⁇ also comprises 'a continuous, ⁇ resilient body l8, conveniently composed of molded rubber, the 'endof the 'distal portion'B terminating in ya rigidtip ⁇ Il) 'securedthereto "The body 8 incloses a longitudinally extending, large lumen or fluid passage I2,”vvhich communicates lwith iluid passage ⁇ holes I4 and I E, the series of holes I 4 extending longitudinally along the periphery of the Vdistal 'portion 'B of the tube, whilethe series of holes' I6 extends circumferentially around the rigid distal tip I0.
  • the body 8 of the tube also incloses a relatively narrow uid passage or lumen I8, which extends parallel to the passage I2, but opens into the periphery of the distal portion B of the tube in advance of the tip end and with a channel I9 enclosed by a resilient, extensible balloon member 20 which can be inflated or deated at will through air or other fluid passing under pressure through the passage I8, or through suction applied to this passage.
  • the distal tip I0 which is a rigid tip for guidance of the tube, is passed through the pylorus, as is indicated in Fig. l, and into the intestine, then the balloon 20 is inflated by air or other fluid under pressure in the passage I8.
  • the inflation of the balloon 20 after insertion into the intestine gives the intestine something large to grasp for pro-pulsion of the tube along the intestine.
  • the holes I4 and I6 enable gas and fluid to be evacuated from the intestine under suction applied to the passage I2, and, alternatively, fluid may be injected ,into the intestine through these holes. It will be noted that the balloon member 29 is intermediate the series of holes I4 and I6.
  • the periphery of the distal portion B of the improved gastron intestinal tube of this invention is interrupted by a pair of series of diametrically oppositely disposed projections or lugs 22, which extend in opposite directions from the periphery of the tube, the individual members of one of the series being staggered relatively to the individual members of theother series.
  • the body 8 of the tube also has molded therevend of the proximal portion A of the tube, the
  • each series of the projections or lugs 22 being spaced sufficiently far from the shoulder portions 21 and 29 to permit the projecting ends of the Wires 24, 26 to be twisted into a loop 28, which loops 2B prevent accidental pulling out of the Wires 24 and 26 from their respective passages 23, 25, and also form convenient attaching means for threads lor thin, exible strings 30 which form, in effect, continuations of the Wires'24 and 2B, but which are threadable more easily through holes 3i provided therefor in each of the projections 22.
  • the ends of the strings 30 are knotted adjacent to the Vinflatable balloon member 20.
  • the provision of the guide means is found to facilitate greatly the use and manipulation of the improved tube of this invention, as the guide means for the tube enable the tip to be directed readily into the pylorus under fluoroscopic observation.
  • v Y i AA gastro-intestinal tube comprising a flexible body inclosing a pair of fluid passages eX- tending longitudinally throughthe body of the tube, a rigid distal tipon the tube, a resilient expansible member on the tube adjacent to the 4 tip, one of the fluid passages communicating with fluid passage ports provided in the tip and periphery of the tube proximally of the expansible member, the other of the ypair ⁇ of fluid passages opening into the expansible member,r
  • a gastro-intestinal tube comprising a flexible body enclosing a pair of fluid passages extending longitudinally through the body, a rigid distal tip on the tube, a resilient expansible s member on the tube adjacent to the tip, one of the said fluid passages communicating with fluid passage ports vprovided in the tip and periphery of the tube proxlmally of the expansible member, the other of the pair of fluid passages opening into thev expansible member, oppositely disposed -flexible guide means extending longitudinally through the body of the tube and terminating short of the expansible member, oppositely extending retaining -members intermediate the said'guide means and the expansible member, and flexible prolongations of :the 'said guide means extending through the said oppositely extending retaining members and secured to a terminal member thereof adjacent tothe expansible member for vfacilitating guiding the distal tip of the tube into and through the pylorus and into the small intestine.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Biomedical Technology (AREA)
  • Anesthesiology (AREA)
  • Hematology (AREA)
  • Engineering & Computer Science (AREA)
  • Pulmonology (AREA)
  • Biophysics (AREA)
  • Child & Adolescent Psychology (AREA)
  • Otolaryngology (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Description

Feb. 28, 1950 M. P. MAINS GAsTRoINTEsTINAL TUBE` Filed Jan. 4, 1949 @Hon/lult Patented Feb. 28, 1950 UNITED STATES .PATENT o Price 'GASTROINTESTINALQTUBE 'MaI'.ShaIUPauIMainS, `vYardley, Pa. Application J anuary 4, .1949, SerialNo. I.69,143
v '2 Claims. (Cl.128-348) \(Grranted -imder .the act of `March A'3, '1883, as
"The finvention Ydescribedherein :may `loe manufactu-red `and ius'edby -gorifor the :Government ,for governmental purposes, without payment to me of any froyalty thereon.
The present -invention :relates tinal tubes adapted to "-be passed lthrough into the pylorus and thence kinto-the small-intestine for the purpose 4-of 'withdrawing intestinal contents and :for injecting .fuid material into the intestine. i
Such 'tubes "as 4made 'at present cannot'be directed'through fthe 'stomach-with any vdegree -of facility, even under :'uoroscopy. rIhese ytubes tend to ycurl around in'fthe .stomach and there is no way to direct the tip of the tube into the pylorus, and it frequently-.isnecessary to get the tip of the tubeinto the .small intestine .as `soon as possible, especiallyin patients who Lhave intestinal obstruction.
One object oi the present invention is to provide a vgastro-intestinal tube which obviates the objections tothe present construction of tubes and which is passed easily through the stomach into the pylorus under fluoroscopic control.
A further object of the invention is to provide a gastro-intestinal tube which is provided with means for positively guiding the tube through the stomach into the pylorus.
A still further object oi the invention is to provide a gastro-intestinal tube upon which are provided means adapted to be grasped by the intestinal walls for propelling the tube through the pylorus into the intestine.
Further objects of the invention will become apparent as the description proceeds, and the features of novelty will be pointed out in particularity in the appended claims.
The invention will be understood more clearly by reference to the accompanying drawings, in which Fig. 1 is a diagrammatic View showing the improved tube of the present invention passing through the pylorus of the stomach into the small intestine.
Fig. 2 is fragmentary longitudinal sectional elevation of the distal end portion of the tube, with a fragment of the proximal end.
Fig. 3 is a view similar to Fig. 2, but showing the distal end of the tube ilexed for guiding the tube into the pylorus;
Fig. 4 is a side elevation of the tube shown in Figs. 2 and 3;
Fig, 5 is a transverse sectional elevation through the tube, taken on the line V-V of Fig. 2, looking in the direction o f the arrows; and
to 'gastro-intes- :f
.amendedApril 30, 1928.; 370 fO. fG. 757) Fig. 6 llis vanother 'transverse sectional view, 'taken on the line VI-VI of Fig. `2, look-ing in lthe 'direction Vofthe arrows.
Referring more particularly to the drawings, the improved gastro-lintestinal tube of the'present invention comprises va 'proximal portion A and a -itlistal portion `B, the periphery of jthe proximal portion Abeing lcontinuously uninterrupted, while the distal portion-B yis characterized by an interrupted yperiphery due to oppositely aprojecting, relatively staggered projections or ears,'which will be referred ito further hereinafter.
The tube `also comprises 'a continuous, `resilient body l8, conveniently composed of molded rubber, the 'endof the 'distal portion'B terminating in ya rigidtip `Il) 'securedthereto "The body 8 incloses a longitudinally extending, large lumen or fluid passage I2,"vvhich communicates lwith iluid passage `holes I4 and I E, the series of holes I 4 extending longitudinally along the periphery of the Vdistal 'portion 'B of the tube, whilethe series of holes' I6 extends circumferentially around the rigid distal tip I0. The body 8 of the tube also incloses a relatively narrow uid passage or lumen I8, which extends parallel to the passage I2, but opens into the periphery of the distal portion B of the tube in advance of the tip end and with a channel I9 enclosed by a resilient, extensible balloon member 20 which can be inflated or deated at will through air or other fluid passing under pressure through the passage I8, or through suction applied to this passage. In use, the distal tip I0, which is a rigid tip for guidance of the tube, is passed through the pylorus, as is indicated in Fig. l, and into the intestine, then the balloon 20 is inflated by air or other fluid under pressure in the passage I8. The inflation of the balloon 20 after insertion into the intestine gives the intestine something large to grasp for pro-pulsion of the tube along the intestine. The holes I4 and I6 enable gas and fluid to be evacuated from the intestine under suction applied to the passage I2, and, alternatively, fluid may be injected ,into the intestine through these holes. It will be noted that the balloon member 29 is intermediate the series of holes I4 and I6.
As has been mentioned above, the periphery of the distal portion B of the improved gastron intestinal tube of this invention is interrupted by a pair of series of diametrically oppositely disposed projections or lugs 22, which extend in opposite directions from the periphery of the tube, the individual members of one of the series being staggered relatively to the individual members of theother series.
The body 8 of the tube also has molded therevend of the proximal portion A of the tube, the
first member of each series of the projections or lugs 22 being spaced sufficiently far from the shoulder portions 21 and 29 to permit the projecting ends of the Wires 24, 26 to be twisted into a loop 28, which loops 2B prevent accidental pulling out of the Wires 24 and 26 from their respective passages 23, 25, and also form convenient attaching means for threads lor thin, exible strings 30 which form, in effect, continuations of the Wires'24 and 2B, but which are threadable more easily through holes 3i provided therefor in each of the projections 22. The ends of the strings 30 are knotted adjacent to the Vinflatable balloon member 20. By pulling on the Wires 24 and 26 and the strings 30, the distal tip f It) of the tube can be guided positively through the stomach and pylorus-under direct vision using the uoroscope for observing the course of the tube.
The provision of the guide means is found to facilitate greatly the use and manipulation of the improved tube of this invention, as the guide means for the tube enable the tip to be directed readily into the pylorus under fluoroscopic observation. Y ,Y
Having thus described my invention, what I claim as new and Wish to secure by Letters -Patent is: v Y i 1. AA gastro-intestinal tube comprising a flexible body inclosing a pair of fluid passages eX- tending longitudinally throughthe body of the tube, a rigid distal tipon the tube, a resilient expansible member on the tube adjacent to the 4 tip, one of the fluid passages communicating with fluid passage ports provided in the tip and periphery of the tube proximally of the expansible member, the other of the ypair` of fluid passages opening into the expansible member,r
and oppositely disposed flexible guide means extending longitudinallyf"through the' body of the tube to apoint adjacent `to the expansible member for facilitating guiding the distal tip of the tube into and through the pylorus and into the small intestine.
2.' A gastro-intestinal tube comprising a flexible body enclosing a pair of fluid passages extending longitudinally through the body, a rigid distal tip on the tube, a resilient expansible s member on the tube adjacent to the tip, one of the said fluid passages communicating with fluid passage ports vprovided in the tip and periphery of the tube proxlmally of the expansible member, the other of the pair of fluid passages opening into thev expansible member, oppositely disposed -flexible guide means extending longitudinally through the body of the tube and terminating short of the expansible member, oppositely extending retaining -members intermediate the said'guide means and the expansible member, and flexible prolongations of :the 'said guide means extending through the said oppositely extending retaining members and secured to a terminal member thereof adjacent tothe expansible member for vfacilitating guiding the distal tip of the tube into and through the pylorus and into the small intestine.
' MARSHALL PAUL MAINS.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS
US69143A 1949-01-04 1949-01-04 Gastrointestinal tube Expired - Lifetime US2498692A (en)

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Cited By (71)

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US2574840A (en) * 1949-07-08 1951-11-13 Pieri Jean Flexible medical probe
US2685289A (en) * 1952-11-03 1954-08-03 Jr John W Devine Surgical apparatus for intestinal intubation
US2688329A (en) * 1953-03-19 1954-09-07 American Cystoscope Makers Inc Catheter
US2981254A (en) * 1957-11-12 1961-04-25 Edwin G Vanderbilt Apparatus for the gas deflation of an animal's stomach
US3058473A (en) * 1959-11-27 1962-10-16 Alfred E Whitchead Remotely directing catheters and tools
US3060972A (en) * 1957-08-22 1962-10-30 Bausch & Lomb Flexible tube structures
US3470876A (en) * 1966-09-28 1969-10-07 John Barchilon Dirigible catheter
US3665928A (en) * 1969-10-06 1972-05-30 Louis R M Del Guercio Self propelled catheter
US3802440A (en) * 1972-12-19 1974-04-09 M Salem Intubation guide
FR2204431A1 (en) * 1972-10-26 1974-05-24 Medical Products Corp
US3913565A (en) * 1973-05-18 1975-10-21 Olympus Optical Co Guide tube for a treating instrument to be inserted into body cavity
US4057065A (en) * 1976-06-21 1977-11-08 Dow Corning Corporation Percutaneous gastrointestinal tube
US4150676A (en) * 1975-07-01 1979-04-24 National Catheter Corp. Endotracheal tubes with intubation direction control means
US4329995A (en) * 1980-08-29 1982-05-18 Board Of Regents, The University Of Texas System Catheter for nasotracheal aspiration of uncontaminated sputum specimens
US4368739A (en) * 1979-07-18 1983-01-18 Nelson Jr Richard L Long intestinal catheter
US4650467A (en) * 1984-08-22 1987-03-17 Sarcem S.A. Remote control catheter
US4650466A (en) * 1985-11-01 1987-03-17 Angiobrade Partners Angioplasty device
US4685457A (en) * 1986-08-29 1987-08-11 Donenfeld Roger F Endotracheal tube and method of intubation
US4723936A (en) * 1986-07-22 1988-02-09 Versaflex Delivery Systems Inc. Steerable catheter
US4826087A (en) * 1985-02-12 1989-05-02 David Chinery Manipulative device
US4850351A (en) * 1985-05-22 1989-07-25 C. R. Bard, Inc. Wire guided laser catheter
US4878905A (en) * 1986-02-07 1989-11-07 Blass Karl G Gastrointestinal module: a nonsurgical implant
US4885003A (en) * 1988-07-25 1989-12-05 Cordis Corporation Double mesh balloon catheter device
US4921484A (en) * 1988-07-25 1990-05-01 Cordis Corporation Mesh balloon catheter device
US4944740A (en) * 1984-09-18 1990-07-31 Medtronic Versaflex, Inc. Outer exchange catheter system
US4960411A (en) * 1984-09-18 1990-10-02 Medtronic Versaflex, Inc. Low profile sterrable soft-tip catheter
US5114414A (en) * 1984-09-18 1992-05-19 Medtronic, Inc. Low profile steerable catheter
US5125895A (en) * 1986-07-22 1992-06-30 Medtronic Versaflex, Inc. Steerable catheter
US5195968A (en) * 1990-02-02 1993-03-23 Ingemar Lundquist Catheter steering mechanism
US5254088A (en) * 1990-02-02 1993-10-19 Ep Technologies, Inc. Catheter steering mechanism
US5306245A (en) * 1993-02-23 1994-04-26 Advanced Surgical Inc. Articulating device
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US5997509A (en) * 1998-03-06 1999-12-07 Cornell Research Foundation, Inc. Minimally invasive gene therapy delivery device and method
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US6126649A (en) * 1999-06-10 2000-10-03 Transvascular, Inc. Steerable catheter with external guidewire as catheter tip deflector
US20020161353A1 (en) * 2001-04-30 2002-10-31 Bart-Jan Kortelling Steerable catheter with reinforced tip
US6508802B1 (en) 2000-05-23 2003-01-21 Cornell Research Foundation, Inc. Remote sensing gene therapy delivery device and method of administering a therapeutic solution to a heart
US6569114B2 (en) 2001-08-31 2003-05-27 Biosense Webster, Inc. Steerable catheter with struts
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US20060184106A1 (en) * 2005-02-14 2006-08-17 Mcdaniel Benjamin D Steerable catheter with in-plane deflection
US20060264820A1 (en) * 2005-05-19 2006-11-23 Ponzi Dean M Steerable catheter with distal tip orientation sheaths
US20080230056A1 (en) * 2007-03-23 2008-09-25 Benje Boedeker Intubation guide
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US20110077498A1 (en) * 2009-09-29 2011-03-31 Mcdaniel Benjamin D Catheter with biased planar deflection
US20110117542A1 (en) * 2002-12-20 2011-05-19 Acea Biosciences, Inc Real time electronic cell sensing system and applications for cytotoxicity profiling and compound assays
US20140123976A1 (en) * 2011-05-04 2014-05-08 The Regents Of The University Of Michigan Intubation device
US20140163528A1 (en) * 2011-07-27 2014-06-12 The University Of Kansas Maneuverable nasoenteric feeding tube
US20150190615A1 (en) * 2014-01-08 2015-07-09 Covidien Lp Catheter system
US20170007224A1 (en) * 2014-03-31 2017-01-12 Human Extensions Ltd. Steerable medical device
CN107929083A (en) * 2017-12-08 2018-04-20 孟静 A kind of jejunal nutrient canal
EP3488808A1 (en) 2013-09-01 2019-05-29 Human Extensions Ltd Control unit for a medical device
US11717666B2 (en) * 2017-10-06 2023-08-08 Q Medical International Ag Connector device for gastric calibration hoses, as well as medical system comprising a connector device for gastric calibration hoses and a gastric calibration hose

Citations (1)

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