US3373735A - Medical-surgical tube - Google Patents

Medical-surgical tube Download PDF

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US3373735A
US3373735A US500118A US50011865A US3373735A US 3373735 A US3373735 A US 3373735A US 500118 A US500118 A US 500118A US 50011865 A US50011865 A US 50011865A US 3373735 A US3373735 A US 3373735A
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tube
indicator
end portion
liquid
colour
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John P Gallagher
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Priority to GB35934/66A priority patent/GB1104774A/en
Priority to DE19661491731D priority patent/DE1491731B1/en
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/145Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/14539Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue for measuring pH
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61JCONTAINERS 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
    • A61J15/00Feeding-tubes for therapeutic purposes
    • A61J15/0003Nasal or oral feeding-tubes, e.g. tube entering body through nose or mouth
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61JCONTAINERS 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
    • A61J15/00Feeding-tubes for therapeutic purposes
    • A61J15/0026Parts, details or accessories for feeding-tubes
    • A61J15/008Sensor means, e.g. for sensing reflux, acidity or pressure
    • A61J15/0088Sensor means, e.g. for sensing reflux, acidity or pressure for sensing parameters related to the device
    • 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
    • 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
    • A61M31/00Devices for introducing or retaining media, e.g. remedies, in cavities of the body
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/8158With indicator, register, recorder, alarm or inspection means
    • Y10T137/8359Inspection means

Definitions

  • This invention relates to an improved medical-surgical tube and in particular to such a tube having a colorchange acid-base indicator means associa-ted ⁇ therewith.
  • l/Iedieal-.surgical tubes having X--ray o-paque portions are known whereby directing7 a beam of X-rays through the body of a patient in the neighborhood of the inserted tube while observing the relative position of the tube a skilled technician or a physician could determine whether the feeding tube is correctly positioned in the stomach or incorrectly positioned in a lung of the patient. While the use of the X-ray technique for determining the position of medical-surgical tubes will provide the desired result-s such techniques require substantial skills and considerable time and equipment.
  • I-t is, therefore, a principal object of the present invention to provide a simple, relatively inexpensive, medicalsurgical tube having incorporated therein a color-change acid-base indicator means whereby it may be simply, quickly and inexpensively determined if, for example, the distal end of a feeding tube is correctly positioned in a patients stomach by merely determining the color of a color indicator which has 'been bathed in the body fluid surrounding the distal end of the tube.
  • a medical-surgical tube having an internal end portion adapted to be inserted within a body cavity and an external end portion adapted to remain outside of the body, a color-change indicator carrier means associated with the external end portion of the tube and means providing liquid communication between the inner wall of the tube and said indicator carrier means.
  • FIGURE l is a diagrammatic view of the upper portion of the human head illustrating one method of positioning a stomach tube through the nasal passage into the stomach of the patient;
  • FIGURE 2 is a section on line 2 2 of FIGURE l;
  • FIGURE 3 is a transverse section on line 3-3 of FIGURE 2;
  • FIGURE 4 is a transverse section .simil-ar to that illustrated in FIGURE 2 of a further form of the present invention.
  • FIGURE 5 is a longitudinal sectional view similar to that shown in FIGURE 3 of a further form of the improved medioal-surgical tube of the invention.
  • 10 generally designates a stomach tube constructed in accordance with the present invention.
  • the tube 10 has a distal, or internal end portion 14 and an external end portion 12.
  • the stomach tube 10 is4 shown passing through a nostril of a patient 15, down through the esophagus 18, thence to the stomach indicated by the reference arrow.
  • FIG- URE l in broken lines, there is illustrated the tube 10 passing through the nasal passage of the patient 15 and into the larynx, through the trachea thence into the lungs in a manner not desired where the tube 10 is to be used to feed the patient 15.
  • an absorbent piaper ring 22 is molded within the tu'be intermediate the outer wall 24 and the inner wall 26 .with the axis of the ring of absorbent paper 22 being generally coaxial with the axis of the bore of the tube.
  • a plurality of perforations 28 pass through ythe inner wall 26 o'f the tube 10 to the inner surface 30 of the absorbent paper ring 22 whereby liquid within the tube will bath the absorbent paper.
  • the absorbent paper 22 provides a carrier means for a colorchange indicator.
  • the color-change indicator is of the acid-base type and as used herein the color-change indicator is a substance which is used for the visual detection and determination of a specific constituent present in a liquid or mixture of liquids.
  • indicators for the detection of acids and bases consist of substance that undergo visual change within :a predetermined limited range of hydrogen iron ooncentrationjMany such indicators are known in the art.
  • litmus a blue coloring matter from various species of liohens, particularly Vrariolaria, has been found to be a very satisfactory colorchange acid-base indicato-r for the improved stomach tube.
  • Litmus is partially soluble in water or alcohol and when used as .an acid-base indicator it turns red at pH 4.5 and blue .at pH 8.3.
  • Litmus is non-toxis and in view of its nontoxi-mity has been used as a coloring agent for beve-rages.
  • the carrier 22 or the color-change indicator Prior to sale of the improved medical-surgical tube, the carrier 22 or the color-change indicator is charged with for example a litmus solution which after drying remainswithin the carrier..
  • the color indicator would indicate a blue color as the pH of the mucous and other uids in the lungs averages about 7 wit a range of from about 7.45 to about 8.15.
  • the juices bathing the lower end of the tube 10 may be drawn into the tube, to the zone of the color-change indicator by suction means or as illustrated, in FIGURE 3, a plurality of capillary bores 40 may be provided in the tube, connecting the distal end and the absorbent paper 22.
  • the tube may be provided with a channel extending from the distal end to the carrier 22, which channel may be tilled with a wicking substance such as absorbent paper and the like whereby body uids at the distal end of the tube may be wicked into wetting relationship with the ring type carrier 22 for the color-change indicator.
  • FIGURE 4 of the drawing a further form of the improved medical-surgical tube is illustrated.
  • the tube 10' having an inlet or external end portion 12 is provided with an internal carrier 22', such as absorbent paper, for a color-change indicator.
  • the carrier 22 is molded within the tube wall between the outer surface 24 and the inner surface 26 of the tube and one end 43 of the carrier 22 projects inwardly through the inner wall 26' to provide a wick whereby when body uids are drawn upwardly from the distal end to the zone adjacent the color-change indicator carrier 22', the indicator carrier 22' is wetted by wicking action.
  • This form of the invention may also be provided with capillary channels 40 as indicated in FIGURE 3 of the drawing.
  • FIGURE S of the drawing a further form of the present invention is illustrated, wherein the medical-surgical tube 10" having an external end portion 12" is provided with a perforated zone 44 comprising a plurality of perforations 28 which provide for communication between the inner wall 26" and the outer wall 24 of the tube 10".
  • An absorbent band or strip 22 is mounted about the zone of perforations 44 in contact with the outer surface 24 of the tube 10" and is maintained in said stated relationship by a plastic, metal or the like sleeve 46 which may be heat sealed, cemented or frictionally maintained in its illustrated relationship on the outer surface of the tube 10".
  • This form of the invention may also be provided with capillary or wicking channels as discussed with reference to FIGURE 3 of the drawing.
  • the present invention fully accomplishes the aims and objects hereinbefore set forth. While the invention has been particularly described with reference to the stomach tube, the invention has other uses for example, the urine of a healthy person has a known range of pH values and a doctor or technician can readily observe the pI-I condition of the urine during catheter draining thereof through the use of the present invention,
  • a medical-surgical tube having an internal end portion adapted to be inserted within a body cavity and an external end portion adapted to remain outside the body, a color-change acid-base indicator carrier means on the tube and located adjacent the outlet end portion of the tube, and means providing liquid communication between the inner wall of the tube and said indicator carrier means.
  • said indicator carrier means comprises a piece of absorbent material and an indicator absorbed thereon.
  • a medical-surgical tube having Van internal end portion adapted to be inserted within a body and an external end portion adapted to remain outside the body, a color-change indicator carrier means on the tube and located adjacent the external end portion of the tube, an indicator absorbed on said carrier means, means providing liquid communication between the internal wall of the tube and the indicator absorbed on the indicator carrier means.
  • the indicator carrier means comprises an absorbent paper band formed within the tube and the means providing liquid communication between the internal wall of the tube and said indicator carrier means comprises a plurality of openings extending from the indicator carrier means through the inner wall of the tube in the zone of the indicator carrier means.
  • said indicator carrier means comprises a piece of absorbent paper one edge of which is maintained in uid contact with a portion of the inner wall of said tube.
  • the indicator carrier means comprises a band of absorbent material extending about a portion of the outer surface of the tube, a protective band extends over said absorbent carrier, and a zone of perforations extends between the inner surface of said absorbent carrier and the interior of said tube.

Abstract

1,104,774. Body fluid testing device. J. P. GALLACHER. 11 Aug., 1966 [21 Oct., 1965], No. 35934/66. Heading B1X. [Also in Division A5] A liquid-testing device comprises a tube at one end portion of which is colour-change indicator means located in spaced relation with the internal surface of the tube. The tube includes means which provides liquid communication between the other end of the tube and the indicator means so that the indicator means may be exposed to, and thus may convey information relating to, liquid which initially is adjacent this other end portion of the tube. The indicator means may comprise an absorbent carrier, for example of paper, on which is absorbed a colour-change indicator; the indicator may be an acid-base colour-change indicator, for example litmus, phenolphthalein, methyl orange or phenol red. In the embodiment illustrated in Figure 5, the indicator means is in the form of an absorbent band 22" carrying a colour-change indicator and removably mounted on the outer wall surface 24" of the tube 10" at the end portion 12" thereof by means of a plastics or metal sleeve 46. The liquid communication means is provided by a plurality of perforations 28" formed in a zone 44 to extend through the wall of the tube from the internal wall surface 26" thereof to the indicator means; alternatively or in addition, the liquid communication may be provided by a plurality of capillary bores 40 (see Fig. 3) and/or by a channel filled with wicking material. In the embodiment of Figs. 2, 3 and 4 (Figs. 2 and 4, not shown), the absorbent band 22 is mounted between the inner and outer wall surfaces 26 and 24 of the tube. The liquid-testing device is of especial use in medical or surgical procedures.

Description

J. P. GALLAGHl-:R 3,373,735
MEDICAL-SURGICAL TUBE Filed oct. 21, 1965 vg, IO :sa G O O @I @OOO Bywgwu ATTORNEYS United States Patent O 3,373,735 MEDICAL-SURGICAL TUBE .lohn P. Gallagher, 2415 Foxhall Road NW.,
` Washington, D.C. 20007 Filed Oct. 21, 1965, Ser. No. 500,118 7 Claims. (Cl. 12S-2) This invention relates to an improved medical-surgical tube and in particular to such a tube having a colorchange acid-base indicator means associa-ted `therewith.
In many surgical or clinical procedures, in which tubes or catheters are employed, it is essential to be able to determine the location of the outlet or distal end o-f the tube within the body of the patient. One important and common use of medical-surgical tubes is for feeding patients wherein a feeding tube is inserted through one of the nostrils into the stomach of the patient. After the tube is lodged in the stomach, the desired fluids may 'be forced through the tubel directly int-o the patients stomach. However, .it is not uncommon, in passing the distal en-d of the tube from the nasal cavity toward the stomach, that the distal end enters the traohea whereby the distal end lodges in a lung rather than the stomach of a patient. Forcing of fluids into such a mislocated tube could result in undesirable complications.
l/Iedieal-.surgical tubes having X--ray o-paque portions are known whereby directing7 a beam of X-rays through the body of a patient in the neighborhood of the inserted tube while observing the relative position of the tube a skilled technician or a physician could determine whether the feeding tube is correctly positioned in the stomach or incorrectly positioned in a lung of the patient. While the use of the X-ray technique for determining the position of medical-surgical tubes will provide the desired result-s such techniques require substantial skills and considerable time and equipment.
I-t is, therefore, a principal object of the present invention to provide a simple, relatively inexpensive, medicalsurgical tube having incorporated therein a color-change acid-base indicator means whereby it may be simply, quickly and inexpensively determined if, for example, the distal end of a feeding tube is correctly positioned in a patients stomach by merely determining the color of a color indicator which has 'been bathed in the body fluid surrounding the distal end of the tube.
These and other objects and advantages of the present invention are provided by a medical-surgical tube having an internal end portion adapted to be inserted within a body cavity and an external end portion adapted to remain outside of the body, a color-change indicator carrier means associated with the external end portion of the tube and means providing liquid communication between the inner wall of the tube and said indicator carrier means.
The invention will be more particularly described with specic reference to a stom-ach tube and in conjunction with the illustrative embodiments of the invention sho-wn in the drawings wherein:
FIGURE l is a diagrammatic view of the upper portion of the human head illustrating one method of positioning a stomach tube through the nasal passage into the stomach of the patient;
FIGURE 2 is a section on line 2 2 of FIGURE l;
FIGURE 3 is a transverse section on line 3-3 of FIGURE 2;
FIGURE 4 is a transverse section .simil-ar to that illustrated in FIGURE 2 of a further form of the present invention; and
FIGURE 5 is a longitudinal sectional view similar to that shown in FIGURE 3 of a further form of the improved medioal-surgical tube of the invention.
Referring to the drawings and in particular to FIG- ICC URES l, 2 and 3, 10 generally designates a stomach tube constructed in accordance with the present invention.
The tube 10 has a distal, or internal end portion 14 and an external end portion 12. In FIGURE l the stomach tube 10 is4 shown passing through a nostril of a patient 15, down through the esophagus 18, thence to the stomach indicated by the reference arrow. Also in FIG- URE l, in broken lines, there is illustrated the tube 10 passing through the nasal passage of the patient 15 and into the larynx, through the trachea thence into the lungs in a manner not desired where the tube 10 is to be used to feed the patient 15.
Now referring particularly to FIGURES 2 and 3, adjacent the external end portion 12 of the tube 10 an absorbent piaper ring 22 is molded within the tu'be intermediate the outer wall 24 and the inner wall 26 .with the axis of the ring of absorbent paper 22 being generally coaxial with the axis of the bore of the tube. A plurality of perforations 28 pass through ythe inner wall 26 o'f the tube 10 to the inner surface 30 of the absorbent paper ring 22 whereby liquid within the tube will bath the absorbent paper. In this form of the invention the absorbent paper 22 provides a carrier means for a colorchange indicator. Preferably the color-change indicator is of the acid-base type and as used herein the color-change indicator is a substance which is used for the visual detection and determination of a specific constituent present in a liquid or mixture of liquids.
In general, indicators for the detection of acids and bases consist of substance that undergo visual change Within :a predetermined limited range of hydrogen iron ooncentrationjMany such indicators are known in the art. Of the well-known indicators, litmus, a blue coloring matter from various species of liohens, particularly Vrariolaria, has been found to be a very satisfactory colorchange acid-base indicato-r for the improved stomach tube. Litmus is partially soluble in water or alcohol and when used as .an acid-base indicator it turns red at pH 4.5 and blue .at pH 8.3. Litmus is non-toxis and in view of its nontoxi-mity has been used as a coloring agent for beve-rages.
Prior to sale of the improved medical-surgical tube, the carrier 22 or the color-change indicator is charged with for example a litmus solution which after drying remainswithin the carrier..
Other useful color-change acid-base indicators are set forth in the following table with their color characterisitics:
TAB LE I Trade Name Methyl Orange Phenol Red Phenolphthalein.
In operation of the stomach tube hereinabove described with reference to the FIGURES 1 through 3, after the tube is inserted in the stomach of a patient a small amount of the fluid present in the body adjacent the distal end is drawn into the tube to pass through the openings 28 and thus wet the color-change indicator carrier 22. If the distal end of the tube is properly within the stomach of the patient, and if the indicator is, for example, litmus the absorbent paper 22 will turn red as, on the average the pH of stomach juices is about 1 to about 2. If, however, the distal end of the tube has become improperly lodged in the lungs, the color indicator would indicate a blue color as the pH of the mucous and other uids in the lungs averages about 7 wit a range of from about 7.45 to about 8.15.
The juices bathing the lower end of the tube 10 may be drawn into the tube, to the zone of the color-change indicator by suction means or as illustrated, in FIGURE 3, a plurality of capillary bores 40 may be provided in the tube, connecting the distal end and the absorbent paper 22. As a substitute for or in conjunction with the opening 28 and/or the capillary tubes 40, the tube may be provided with a channel extending from the distal end to the carrier 22, which channel may be tilled with a wicking substance such as absorbent paper and the like whereby body uids at the distal end of the tube may be wicked into wetting relationship with the ring type carrier 22 for the color-change indicator.
Referring to FIGURE 4 of the drawing, a further form of the improved medical-surgical tube is illustrated. In FIGURE 4 the tube 10' having an inlet or external end portion 12 is provided with an internal carrier 22', such as absorbent paper, for a color-change indicator. In FIG- URE 4 the carrier 22 is molded within the tube wall between the outer surface 24 and the inner surface 26 of the tube and one end 43 of the carrier 22 projects inwardly through the inner wall 26' to provide a wick whereby when body uids are drawn upwardly from the distal end to the zone adjacent the color-change indicator carrier 22', the indicator carrier 22' is wetted by wicking action. This form of the invention may also be provided with capillary channels 40 as indicated in FIGURE 3 of the drawing.
Referring to FIGURE S of the drawing, a further form of the present invention is illustrated, wherein the medical-surgical tube 10" having an external end portion 12" is provided with a perforated zone 44 comprising a plurality of perforations 28 which provide for communication between the inner wall 26" and the outer wall 24 of the tube 10". An absorbent band or strip 22 is mounted about the zone of perforations 44 in contact with the outer surface 24 of the tube 10" and is maintained in said stated relationship by a plastic, metal or the like sleeve 46 which may be heat sealed, cemented or frictionally maintained in its illustrated relationship on the outer surface of the tube 10". This form of the invention may also be provided with capillary or wicking channels as discussed with reference to FIGURE 3 of the drawing. In the form of the invention illustrated in FIG- UR-E 5, if the ring or band 46 is frictionally maintained in its illustrated relationship to the perforate zone 44 and the absorbent carrier 22" for the color-change indicator, the absorbent band 22" may be readily replaced after each use.
From the foregoing description, taken in consideration with the drawings, it will be seen that the present invention fully accomplishes the aims and objects hereinbefore set forth. While the invention has been particularly described with reference to the stomach tube, the invention has other uses for example, the urine of a healthy person has a known range of pH values and a doctor or technician can readily observe the pI-I condition of the urine during catheter draining thereof through the use of the present invention,
I claim:
1. A medical-surgical tube having an internal end portion adapted to be inserted within a body cavity and an external end portion adapted to remain outside the body, a color-change acid-base indicator carrier means on the tube and located adjacent the outlet end portion of the tube, and means providing liquid communication between the inner wall of the tube and said indicator carrier means.
2. The invention 'clened in claim 1 wherein said indicator carrier means comprises a piece of absorbent material and an indicator absorbed thereon.
3. The invention defined in claim 2 wherein the indicator absorbed on the absorbent material comprises litmus or phenolphthalein.
4. A medical-surgical tube having Van internal end portion adapted to be inserted within a body and an external end portion adapted to remain outside the body, a color-change indicator carrier means on the tube and located adjacent the external end portion of the tube, an indicator absorbed on said carrier means, means providing liquid communication between the internal wall of the tube and the indicator absorbed on the indicator carrier means.
5. The invention defined in claim 4 wherein the indicator carrier means comprises an absorbent paper band formed within the tube and the means providing liquid communication between the internal wall of the tube and said indicator carrier means comprises a plurality of openings extending from the indicator carrier means through the inner wall of the tube in the zone of the indicator carrier means.
6. The invention defined in claim 1' wherein said indicator carrier means comprises a piece of absorbent paper one edge of which is maintained in uid contact with a portion of the inner wall of said tube.
7. The invention defined in claim 1 wherein the indicator carrier means comprises a band of absorbent material extending about a portion of the outer surface of the tube, a protective band extends over said absorbent carrier, and a zone of perforations extends between the inner surface of said absorbent carrier and the interior of said tube.
References Cited UNITED STATES PATENTS 2,567,445 9/ 1951 Parker 116-114 X 2,918,893 12/1959 Norton 116-114 3,058,472 10/ 1962 Thornton 12S- 348 3,15 5,091 1 1/ 1964 Nissenbaum 128--2 FOREIGN PATENTS 519,368 2/ 1931 Germany. 241,199 1/ 1926 Great Britain.
DALTON L. TRULUCK, Primary Examiner.

Claims (1)

1. A MEDICAL-SURGICAL TUBE HAVING AN INTERNAL END PORTION ADAPTED TO BE INSERTED WITHIN A BODY CAVITY AND AN EXTERNAL END PORTION ADAPTED TO REMAIN OUTSIDE THE BODY, A COLOR-CHANGE ACID-BASE INDICATOR CARRIER MEANS ON THE TUBE AND LOCATED ADJACENT THE OUTLET END PORTION OF THE TUBE, AND MEANS PROVIDING LIQUID COMMUNICATION BETWEEN THE INNER WALL OF THE TUBE AND SAID INDICATOR CARRIER MEANS..
US500118A 1965-10-21 1965-10-21 Medical-surgical tube Expired - Lifetime US3373735A (en)

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US500118A US3373735A (en) 1965-10-21 1965-10-21 Medical-surgical tube
GB35934/66A GB1104774A (en) 1965-10-21 1966-08-11 An improved medical-surgical tube
DE19661491731D DE1491731B1 (en) 1965-10-21 1966-09-21 catheter

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US4275768A (en) * 1978-06-16 1981-06-30 Riggs E Gray Reinforced hose having embedded indicia strip
US4344439A (en) * 1980-10-20 1982-08-17 Ulrico Jacobellis Catheter for use in localizing the origin of idiopathic microscopic hematuria
US4381011A (en) * 1981-05-04 1983-04-26 Somers 3Rd Lewis S Enteral feeding apparatus and method
US4601724A (en) * 1984-05-29 1986-07-22 Cordis Corporation Manufacture of tubing assembly for drainage catheter
US4632119A (en) * 1985-10-23 1986-12-30 University Of Health Sciences/The Chicago Medical School Ambulatory esophageal pH monitor
US4655763A (en) * 1984-04-30 1987-04-07 Nutrapack, Inc. Testing and dispensing apparatus for an enteral feeding system
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EP0300221A2 (en) * 1987-07-22 1989-01-25 Becton, Dickinson and Company Body fluid sample collection tube composite
WO1990015572A1 (en) * 1989-06-21 1990-12-27 Synetics Medical, Inc. Intraesophageal catheter
US5005572A (en) * 1988-02-26 1991-04-09 Brigham & Women's Hospital CO2 indicator and the use thereof to evaluate placement of tracheal tubes
US5085216A (en) * 1989-07-25 1992-02-04 Henley Jr Robert L Nasogastric/nasointestinal enteral feeding tube and method for avoiding tracheobronchial misplacement
US5105812A (en) * 1990-07-25 1992-04-21 Baylor College Of Medicine Nasogastric tube with removable pH detector
US5166075A (en) * 1986-08-13 1992-11-24 Nellcor Incorporated Method for determining whether respiratory gas is present in a gaseous sample
US5179002A (en) * 1986-08-13 1993-01-12 Nellcor Incorporated Apparatus for determining whether respiratory gas is present in a gaseous sample
US5273029A (en) * 1992-04-30 1993-12-28 Wilk Peter J Endotracheal tube assembly and related method and obturator
US5334189A (en) * 1991-06-03 1994-08-02 Wade Stephen E Device for controlled diffusion of a chemical substance
US5375592A (en) * 1993-04-08 1994-12-27 Kirk; Gilbert M. Carbon dioxide detector and shield
US5411022A (en) * 1993-07-01 1995-05-02 Mccue; Michael Continuous pH monitoring system and method of using same
WO1995011716A1 (en) * 1993-10-26 1995-05-04 The Regents Of The University Of California Integrated end tidal carbon dioxide monitor and endotracheal tube
US5417657A (en) * 1993-10-06 1995-05-23 Hauer; Carolyn No-sepsis urinary drainage catheter
US5421325A (en) * 1992-04-30 1995-06-06 Cinberg; James Z. Endotracheal tube assembly and related method
US5438985A (en) * 1993-01-25 1995-08-08 Synectics Medical, Incorporated Ambulatory recording of the presence and activity of substances in gastro-intestinal compartments
US5468451A (en) * 1992-06-29 1995-11-21 Minco Ab Device for indicating the presence of carbon dioxide in a patient's exhaled air
US5477860A (en) * 1992-11-05 1995-12-26 Synectics Medical, Inc. Catheter for measuring respiration and respiratory effort
US5477854A (en) * 1993-09-16 1995-12-26 Synectics Medical, Inc. System and method to monitor gastrointestinal Helicobacter pylori infection
US5479935A (en) * 1993-10-21 1996-01-02 Synectics Medical, Inc. Ambulatory reflux monitoring system
US5507289A (en) * 1993-09-16 1996-04-16 Synectics Medical, Inc. System and method to diagnose bacterial growth
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GB1104774A (en) 1968-02-28

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