CA1071550A - Flexible tubing - Google Patents
Flexible tubingInfo
- Publication number
- CA1071550A CA1071550A CA285,636A CA285636A CA1071550A CA 1071550 A CA1071550 A CA 1071550A CA 285636 A CA285636 A CA 285636A CA 1071550 A CA1071550 A CA 1071550A
- Authority
- CA
- Canada
- Prior art keywords
- wall portion
- tubing
- strand
- flexible
- flexible tubing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
- F16L11/12—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting
-
- 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
- A61M25/0108—Steering means as part of the catheter or advancing means; Markers for positioning using radio-opaque or ultrasound markers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
- B29C48/151—Coating hollow articles
- B29C48/152—Coating hollow articles the inner surfaces thereof
- B29C48/153—Coating both inner and outer surfaces
-
- 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
- A61M25/0009—Making of catheters or other medical or surgical tubes
- A61M25/0012—Making of catheters or other medical or surgical tubes with embedded structures, e.g. coils, braids, meshes, strands or radiopaque coils
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/05—Filamentary, e.g. strands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
- B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
Abstract
Abstract Flexible tubing is formed with a tubular extruded wall portion, typically formed of melt-extrudable thermo-plastic, and an extruded strand portion, typically melt-extrudable thermoplastic, embedded in the wall portion by coextrusion. The strand portion extends lengthwise of the wall portion disposed helically thereabout and therein. Either the wall portion or the strand portion is radiopaque, and the other is optically translucent.
The wall portion also is constructed of flexible mate-rial, and the strand portion is preferably constructed of a relatively stiff, resilient material.
The wall portion also is constructed of flexible mate-rial, and the strand portion is preferably constructed of a relatively stiff, resilient material.
Description
~ ~ ~ ~,5~ ~
S P E C I F I C A T I o N
_ . . . _ _ .
This invention relates to flexible tubing which is particularly suitable for medical use, such as in catheters and the lika.
, . . . .
In surgical and other hospital practice of medicine, the use of flexible tubing is necessary and commonplace.
Tubes are used for catheters, for nasogastric suction, for administration of intravenous fluids and blood, to mention but a few uses. Occasionally tubing is implanted in the body permanently, as for the drainage of spinal fluid into the venous system or peritoneal cavity for hydro-cephalus; or as for drainage of ascitic fluid in a periteneo-; venous shunt. At other times, tubing is temporarily inserted, as for taking venous pressure, or for infusing concentrated glucose solution into the vena cava.
Generally, thexe are two problems whi~h are encaun~tered in the medical use of tubing. ~he first of these is the problem caused by unnoticed, inadvertent kinking. The second problem arises from the need, particularly where the tubing is inserted or implanted within the body, to ascer-tain the location of the center of the tubing, for example :
by radiography.
Generally, tubing which is sufficiently fle~ible formedical use, as described above, must be constructed of material which is relatively flexible and must be con-structed with relatively thin walls, not only to permit the necessary flexibility but also to accommodate flow through the tubing. Such tubing is subject, upon bending, to kinking and consequently collapse and blockage of flow. When kinking inadvertantly occurs and is unnoticed, the tubing ceases to function as desired.
If the tubing is part of a urinary collecting system with drainage of the bladder by a catheter, the flow of urine is interrputed by kinking of the tubing and accumu-lates in the bladder. While this may not be catastrophic, in other circumstances the kinking of a drainage tube could cause fatal consequences. Consequently, non-kinkable tubing is achieved by utili~ing thicker wall sections by using stiffer materialsl or by both. These corrective fac-tors result in lowering the flexibility of the tubing to the point where it no longer is useful. Alternatively, steel or other resilient metal springs can be incorporated into the wall of plastic tubing by a complicated helical ; laminating process which not only is expensive but creates problems in terminating the tubing to avoid corrosion and the like. An additional problem encountered when metal wire is ~ncorporated into the flexible tubing is that the tubing must often be transected in order to shorten it.
This is accomplished with some difficulty since the spring wire is difficult to cut and cutting the tubing will ex-pose the wire to the corrosive action of the ~issues. In addition, the exposed wire may pierce the lumen of the wall of the body structure in which the tube was placed. There are, therefore, good medical reasons why wire is less satisfactory as an anti-kinking means in flexible tubing, which, as well as the problems encountered in the manufacture of wire containing tubing, make such tubing undesirable.
It is heretobefore been proposed in utilizing tubing, either introduced into or implanted within the body, that the tubing be made radiopaque. This results in tubing which is not optically translucent, and there-fore presents problems in determinins the presenc~ and position of foreign matter and the like when the tubing is cleaned and sterilized. One solution to the latter problem is the coextrusion of a radiopaque stripe in the wall of the otherwise translucent tubing tU. S. Patent
S P E C I F I C A T I o N
_ . . . _ _ .
This invention relates to flexible tubing which is particularly suitable for medical use, such as in catheters and the lika.
, . . . .
In surgical and other hospital practice of medicine, the use of flexible tubing is necessary and commonplace.
Tubes are used for catheters, for nasogastric suction, for administration of intravenous fluids and blood, to mention but a few uses. Occasionally tubing is implanted in the body permanently, as for the drainage of spinal fluid into the venous system or peritoneal cavity for hydro-cephalus; or as for drainage of ascitic fluid in a periteneo-; venous shunt. At other times, tubing is temporarily inserted, as for taking venous pressure, or for infusing concentrated glucose solution into the vena cava.
Generally, thexe are two problems whi~h are encaun~tered in the medical use of tubing. ~he first of these is the problem caused by unnoticed, inadvertent kinking. The second problem arises from the need, particularly where the tubing is inserted or implanted within the body, to ascer-tain the location of the center of the tubing, for example :
by radiography.
Generally, tubing which is sufficiently fle~ible formedical use, as described above, must be constructed of material which is relatively flexible and must be con-structed with relatively thin walls, not only to permit the necessary flexibility but also to accommodate flow through the tubing. Such tubing is subject, upon bending, to kinking and consequently collapse and blockage of flow. When kinking inadvertantly occurs and is unnoticed, the tubing ceases to function as desired.
If the tubing is part of a urinary collecting system with drainage of the bladder by a catheter, the flow of urine is interrputed by kinking of the tubing and accumu-lates in the bladder. While this may not be catastrophic, in other circumstances the kinking of a drainage tube could cause fatal consequences. Consequently, non-kinkable tubing is achieved by utili~ing thicker wall sections by using stiffer materialsl or by both. These corrective fac-tors result in lowering the flexibility of the tubing to the point where it no longer is useful. Alternatively, steel or other resilient metal springs can be incorporated into the wall of plastic tubing by a complicated helical ; laminating process which not only is expensive but creates problems in terminating the tubing to avoid corrosion and the like. An additional problem encountered when metal wire is ~ncorporated into the flexible tubing is that the tubing must often be transected in order to shorten it.
This is accomplished with some difficulty since the spring wire is difficult to cut and cutting the tubing will ex-pose the wire to the corrosive action of the ~issues. In addition, the exposed wire may pierce the lumen of the wall of the body structure in which the tube was placed. There are, therefore, good medical reasons why wire is less satisfactory as an anti-kinking means in flexible tubing, which, as well as the problems encountered in the manufacture of wire containing tubing, make such tubing undesirable.
It is heretobefore been proposed in utilizing tubing, either introduced into or implanted within the body, that the tubing be made radiopaque. This results in tubing which is not optically translucent, and there-fore presents problems in determinins the presenc~ and position of foreign matter and the like when the tubing is cleaned and sterilized. One solution to the latter problem is the coextrusion of a radiopaque stripe in the wall of the otherwise translucent tubing tU. S. Patent
2,857,915) but such stripes do not give an indication of the aize of the lumen, and hence of it:s center, and also are a poor indication that a sect:ion of tubing has kinked.
It is accordingly a principal object to the present invention to provide a flexible tubing suitable for medi-cal use which is highly resistent to kinking. It is a -further object of this invention to provide such tubing in which the size of the tubing and the presence of a kink are immediately apparent on radiography, but in which the tubing is optically translucent to facilitate cleaning.
These and other objects of the present invention, which will become more apparent hereinafter, are basically :~7~
achieved by forming tubing, for example by extrusion tech-niques, having a generally homogeneous tubular wall sec-tion composed of a relatively flexible material, in which there is embedded a helical strand of relatively stiff, resilient material, extending leng~hwise of the wall portion along a helical path about the wall portion.
Radiopa~ue materials are incorporated either in the wall portion o~ in the strand portion, and the other portion is formed of optically translucent material. Preferably the radiopaque materials are incorporated in the strand portion.
Generally the combination of a relatively flexible wall portion reinforced with a resilient, stiff helical strand is substantially unkinkable, maintains its lumen even on acute flexion and yet is sufficiently flexible for most medical uses, enabling relatively thin wall constructions to maximize flow through the tubing. Such a construction is readily manufactured by coextrusion, preferably of two melt-extrudable, compatible ~hermo-plastic materials, one, when set, being relatively flex-ibl~ and the other, the helical portion, when set, being stiff and resilient. Such coextrusion is readily achieved utilizing apparatus, for example as described in Meneidis, U. S. Patent 3,642,396. As noted above, either the wall portion or the strand portion should be of radiopaque material to permit visual location of the out-side dimensions of the tubing by radiography. Since those materials which impart radiopaque character to plastic materials are, for the most part, pigments which also cause the material to become optically opaque~ the other of the wall portion or strand portion sho~d be optically translucent to permit visual inspection of the tubing for cleaning puxposes: preferably the radiopaque mate-rial is utilized in the helical strand portion of the construction to ~btain the most efficiènt inspection of the tubing for cleaning purposes.
-For a more complete understanding of the practical application of this invention, reference is made to the appended drawings in which:
FIG~ 1 is a partially sectioned plan view of a length of flexible tubing constructed with accordance of the present invention; and FIG. 2 is a view similar to FIG. 1 illustrating flexing of the tubing.
In the drawings, the reference numeral 10 generally designates a section of flexible tubing in accordance with the present invention. Tubing 10 basically includes a tubular wall portion 11 formed by extrusion, preferably of a melt-extrudable material, such as a silicone rubber, which after cooling, sets to a relatively flexible homo-geneous structure. Embedded in wall portion 11 is a helical strand 12 which i9 formed by coextrusion with ~7~
wall portion 11 utilizing a rotating injection port, such that, while the wall portion 11 is extruded as a cylinder, the rotating injection port introduces the material from which strand 12 is formed describ~ng a helical path in the cylindrical portion 11. Strand portion 12 is formed, for example, of a diffe~nt sili-cone rubber, which when set is highly stiff and resi- -lient and in which is incorporated a radiopaque pigment, such as calcium carbonate, barium sulfate, bismuth oxychloride or the like.
While combinations of melt-extrudable, compatible materials such as flexible and stiff, resilient silicone rubbers can be utilized to form wall portion 11 and strand portion 12, respectively, other materials and combinations can be employed; for example in place of the stiff resi-lient silicone rubber, strand 12 can be formed by a coex- -truded thinner helical band of polysulfone. Polysulfone is particularly useful in combination with the fle*ihle silicone rubber wall portion 11 since the polysulfone is exceedingly stiff and has an extremely high heat deflection temperature which is important in permitting heat sterili-zation. Other "engineering-type" plastics can be substi-tuted for helical strand 12, by coextrusion with ethylene vinyl acetate copolymer, ~orming wall portion 11. Poly-butylene, polypropylene and ultra high molecular weight polyethylene have sufficient rigidity to prevent kinking of the soft, more flexible ethylene vinyl acetate copolymer.
In addition, many different grades of ethylene vinyl acetate copolymer are available some o~ which are extremely soft and flexible and can be combined with grades that are quite stiff and hard. Still other examples of combinations of melt-extrudable compatible materials include a rigid vinyl strand 12 with a highly plasticized flexible vinyl thermoplastic wall portion 11. Thermoplastic urethane plastics are specially suitable for this appli-cation because urethanes adhere well to other plastics and have a wide range of flectural modulus. In addi- -tion, glass fibers and other materials can be incorpo-rated into plastics to stiffen them for the purpose of forming strand portion 12. This technique is especially useful with flexible urethane plastic.
Generally, in accordance with this invention, the stiff and less resilient, i.e., rigid, engineering plastic~type material is utilized to form the helical strand which acts as the backbone of the structure and maintains the radius of the relatively flexible plastic of wall portion 11 during flexion of the tube, as illu-strated with reference to FIG. 2. At the same time, theflexible plastic wall portion 11 can be kept clear, or at least optically translucent, to permit i~spection to insure against the accidental inclusion of foreign material and to permit the observation of liquid flow.
The radiopaque materials are added to the backbone, that is strand 12. In some circumstances, it may be more desirable to make tubing of wall portion 11 radiopaque and retain the spiral rigid material 12 as an optically translucent strip, as for example to increase the radiopacity of the tubing for some applications.
.
' : . ,, ':
It is accordingly a principal object to the present invention to provide a flexible tubing suitable for medi-cal use which is highly resistent to kinking. It is a -further object of this invention to provide such tubing in which the size of the tubing and the presence of a kink are immediately apparent on radiography, but in which the tubing is optically translucent to facilitate cleaning.
These and other objects of the present invention, which will become more apparent hereinafter, are basically :~7~
achieved by forming tubing, for example by extrusion tech-niques, having a generally homogeneous tubular wall sec-tion composed of a relatively flexible material, in which there is embedded a helical strand of relatively stiff, resilient material, extending leng~hwise of the wall portion along a helical path about the wall portion.
Radiopa~ue materials are incorporated either in the wall portion o~ in the strand portion, and the other portion is formed of optically translucent material. Preferably the radiopaque materials are incorporated in the strand portion.
Generally the combination of a relatively flexible wall portion reinforced with a resilient, stiff helical strand is substantially unkinkable, maintains its lumen even on acute flexion and yet is sufficiently flexible for most medical uses, enabling relatively thin wall constructions to maximize flow through the tubing. Such a construction is readily manufactured by coextrusion, preferably of two melt-extrudable, compatible ~hermo-plastic materials, one, when set, being relatively flex-ibl~ and the other, the helical portion, when set, being stiff and resilient. Such coextrusion is readily achieved utilizing apparatus, for example as described in Meneidis, U. S. Patent 3,642,396. As noted above, either the wall portion or the strand portion should be of radiopaque material to permit visual location of the out-side dimensions of the tubing by radiography. Since those materials which impart radiopaque character to plastic materials are, for the most part, pigments which also cause the material to become optically opaque~ the other of the wall portion or strand portion sho~d be optically translucent to permit visual inspection of the tubing for cleaning puxposes: preferably the radiopaque mate-rial is utilized in the helical strand portion of the construction to ~btain the most efficiènt inspection of the tubing for cleaning purposes.
-For a more complete understanding of the practical application of this invention, reference is made to the appended drawings in which:
FIG~ 1 is a partially sectioned plan view of a length of flexible tubing constructed with accordance of the present invention; and FIG. 2 is a view similar to FIG. 1 illustrating flexing of the tubing.
In the drawings, the reference numeral 10 generally designates a section of flexible tubing in accordance with the present invention. Tubing 10 basically includes a tubular wall portion 11 formed by extrusion, preferably of a melt-extrudable material, such as a silicone rubber, which after cooling, sets to a relatively flexible homo-geneous structure. Embedded in wall portion 11 is a helical strand 12 which i9 formed by coextrusion with ~7~
wall portion 11 utilizing a rotating injection port, such that, while the wall portion 11 is extruded as a cylinder, the rotating injection port introduces the material from which strand 12 is formed describ~ng a helical path in the cylindrical portion 11. Strand portion 12 is formed, for example, of a diffe~nt sili-cone rubber, which when set is highly stiff and resi- -lient and in which is incorporated a radiopaque pigment, such as calcium carbonate, barium sulfate, bismuth oxychloride or the like.
While combinations of melt-extrudable, compatible materials such as flexible and stiff, resilient silicone rubbers can be utilized to form wall portion 11 and strand portion 12, respectively, other materials and combinations can be employed; for example in place of the stiff resi-lient silicone rubber, strand 12 can be formed by a coex- -truded thinner helical band of polysulfone. Polysulfone is particularly useful in combination with the fle*ihle silicone rubber wall portion 11 since the polysulfone is exceedingly stiff and has an extremely high heat deflection temperature which is important in permitting heat sterili-zation. Other "engineering-type" plastics can be substi-tuted for helical strand 12, by coextrusion with ethylene vinyl acetate copolymer, ~orming wall portion 11. Poly-butylene, polypropylene and ultra high molecular weight polyethylene have sufficient rigidity to prevent kinking of the soft, more flexible ethylene vinyl acetate copolymer.
In addition, many different grades of ethylene vinyl acetate copolymer are available some o~ which are extremely soft and flexible and can be combined with grades that are quite stiff and hard. Still other examples of combinations of melt-extrudable compatible materials include a rigid vinyl strand 12 with a highly plasticized flexible vinyl thermoplastic wall portion 11. Thermoplastic urethane plastics are specially suitable for this appli-cation because urethanes adhere well to other plastics and have a wide range of flectural modulus. In addi- -tion, glass fibers and other materials can be incorpo-rated into plastics to stiffen them for the purpose of forming strand portion 12. This technique is especially useful with flexible urethane plastic.
Generally, in accordance with this invention, the stiff and less resilient, i.e., rigid, engineering plastic~type material is utilized to form the helical strand which acts as the backbone of the structure and maintains the radius of the relatively flexible plastic of wall portion 11 during flexion of the tube, as illu-strated with reference to FIG. 2. At the same time, theflexible plastic wall portion 11 can be kept clear, or at least optically translucent, to permit i~spection to insure against the accidental inclusion of foreign material and to permit the observation of liquid flow.
The radiopaque materials are added to the backbone, that is strand 12. In some circumstances, it may be more desirable to make tubing of wall portion 11 radiopaque and retain the spiral rigid material 12 as an optically translucent strip, as for example to increase the radiopacity of the tubing for some applications.
.
' : . ,, ':
Claims (4)
PROPERTY OF PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Flexible tubing having a thermoplastic extruded, tubular generally homogeneous elongated wall portion and a thermoplastic extruded strand portion embedded in said wall portion by coextrusion therewith extending lengthwise thereof and helically thereabout, one of said wall portion and said strand portion being radiopaque, and the other being optically translucent,
2. Flexible tubing according to claim 1 in which said wall portion is constructed of relatively flexible material, and said strand portion is constructed of stiff, resilient material.
3. Flexible tubing according to claim 1 in which said radiopaque material is said helical strand portion and said optically translucent material is said wall portion.
4. Flexible tubing according to claim 2 in which said radiopaque material is said helical strand portion and said optically translucent material is said wall portion.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US72099476A | 1976-09-07 | 1976-09-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1071550A true CA1071550A (en) | 1980-02-12 |
Family
ID=24896079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA285,636A Expired CA1071550A (en) | 1976-09-07 | 1977-08-29 | Flexible tubing |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5363615A (en) |
| CA (1) | CA1071550A (en) |
| DE (1) | DE2740063A1 (en) |
| FR (1) | FR2363425A1 (en) |
| GB (1) | GB1533204A (en) |
Families Citing this family (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NZ187993A (en) * | 1977-08-05 | 1982-12-07 | R Bentley | Crush resistant rubber hose with non-overlapping helically wound polyolefine reinforcing |
| DE2910749C2 (en) * | 1979-03-19 | 1982-11-25 | Dr. Eduard Fresenius, Chemisch-pharmazeutische Industrie KG, 6380 Bad Homburg | Catheter with contrast stripes |
| EP0033659A3 (en) * | 1980-02-04 | 1982-02-17 | Teleflex Incorporated | Medical-surgical catheter |
| JPS57501165A (en) * | 1980-07-28 | 1982-07-08 | ||
| NO821839L (en) * | 1981-08-31 | 1983-03-28 | David S. Sheridan | ARMED ROOMS FOR MEDICAL-SURGICAL USE. |
| DE3518788A1 (en) * | 1985-05-24 | 1986-05-22 | Daimler-Benz Ag | Plug-in coupling for the fluidically sealed insertion of pipes |
| JPS61290957A (en) * | 1985-06-19 | 1986-12-20 | 信越化学工業株式会社 | Medical silicone rubber composition |
| DE3744108A1 (en) * | 1987-12-24 | 1989-07-06 | Grohe Kg Hans | SHOWER HOSE AND METHOD FOR THE PRODUCTION THEREOF |
| FR2630215B1 (en) * | 1988-04-13 | 1991-02-22 | Benhaim Jean | MEASURING DEVICE AND METHOD FOR CALCULATING THE RADIOLOGICAL MAGNIFICATION IN A SINGLE MEASUREMENT |
| US5071425A (en) * | 1988-09-12 | 1991-12-10 | Devices For Vascular Intervention, Inc. | Atherectomy catheter and method of forming the same |
| EP0359447B1 (en) * | 1988-09-12 | 1995-12-13 | Devices For Vascular Intervention, Inc. | Improved atherectomy catheter |
| ES2043289T3 (en) | 1989-09-25 | 1993-12-16 | Schneider Usa Inc | THE EXTRUSION OF MULTIPLE LAYERS AS A PROCEDURE FOR MAKING ANGIOPLASTY BALLS. |
| SE9100439D0 (en) * | 1991-02-14 | 1991-02-14 | Alfa Laval Agri Int | MJOELKNINGSMASKINSLANG |
| US5195969A (en) | 1991-04-26 | 1993-03-23 | Boston Scientific Corporation | Co-extruded medical balloons and catheter using such balloons |
| JP3577082B2 (en) | 1993-10-01 | 2004-10-13 | ボストン・サイエンティフィック・コーポレーション | Medical device balloon made of thermoplastic elastomer |
| DE19548678A1 (en) * | 1995-12-23 | 1997-06-26 | Sarstedt Walter Geraete | Urine meter |
| GB9709442D0 (en) | 1997-05-08 | 1997-07-02 | Smiths Industries Plc | Tubes and tubing |
| US7947059B2 (en) | 2000-03-02 | 2011-05-24 | Boston Scientific Scimed, Inc. | Multilayer medical device |
| AU2006230718B2 (en) * | 2001-02-16 | 2008-09-25 | Berlin Heart Gmbh | Device for axially conveying body fluids |
| US9440046B2 (en) | 2002-04-04 | 2016-09-13 | Angiodynamics, Inc. | Venous insufficiency treatment method |
| WO2008124790A2 (en) | 2002-07-10 | 2008-10-16 | Angiodynamics, Inc. | Device and method for endovascular treatment for causing closure of a blood vessel |
| US7458967B2 (en) * | 2003-10-31 | 2008-12-02 | Angiodynamics, Inc. | Endovascular treatment apparatus and method |
| US6951675B2 (en) | 2003-01-27 | 2005-10-04 | Scimed Life Systems, Inc. | Multilayer balloon catheter |
| EP1931414A4 (en) * | 2005-10-05 | 2016-02-17 | Acu Rate Pty Ltd | A controlled flow administration set |
| US20090287189A1 (en) * | 2008-05-14 | 2009-11-19 | Becton, Dickinson And Company | Optimal radiopaque catheter |
| US20110319839A1 (en) * | 2010-06-29 | 2011-12-29 | Del Vecchio Daniel A | Disposable surgical instruments |
| WO2012114334A1 (en) | 2011-02-24 | 2012-08-30 | Ilan Ben Oren | Hybrid catheter for endoluminal intervention |
| US8992513B2 (en) | 2011-06-30 | 2015-03-31 | Angiodynamics, Inc | Endovascular plasma treatment device and method of use |
| US11684420B2 (en) | 2016-05-05 | 2023-06-27 | Eximo Medical Ltd. | Apparatus and methods for resecting and/or ablating an undesired tissue |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2857915A (en) * | 1956-04-02 | 1958-10-28 | David S Sheridan | X-ray catheter |
| GB1149963A (en) * | 1965-09-15 | 1969-04-23 | Dorrien Copely Plastics Ltd J | An improved reinforced flexible tube |
| US3529633A (en) * | 1967-10-23 | 1970-09-22 | Bard Inc C R | X-ray opaque tubing having a transparent stripe |
| AT310428B (en) * | 1968-02-14 | 1973-09-25 | Lavreotiki Soc Ind Anonyme | Method and spray head for producing a hose from two different plastics |
| US3605750A (en) * | 1969-04-07 | 1971-09-20 | David S Sheridan | X-ray tip catheter |
| ZA733736B (en) * | 1972-06-07 | 1975-01-29 | Warne & Co Ltd W | And medical purposes improvements in or relating to tubes for surgical |
| US3879516A (en) * | 1972-12-07 | 1975-04-22 | Technibiotics | Method of constructing a catheter |
-
1977
- 1977-08-29 CA CA285,636A patent/CA1071550A/en not_active Expired
- 1977-09-05 GB GB36947/77A patent/GB1533204A/en not_active Expired
- 1977-09-06 DE DE19772740063 patent/DE2740063A1/en not_active Withdrawn
- 1977-09-07 FR FR7727100A patent/FR2363425A1/en active Granted
- 1977-09-07 JP JP10734877A patent/JPS5363615A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5363615A (en) | 1978-06-07 |
| GB1533204A (en) | 1978-11-22 |
| FR2363425B1 (en) | 1983-04-08 |
| FR2363425A1 (en) | 1978-03-31 |
| DE2740063A1 (en) | 1978-03-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1071550A (en) | Flexible tubing | |
| EP0289492B1 (en) | Flexible tubing | |
| EP0420993B1 (en) | Catheter | |
| US4283447A (en) | Radiopaque polyurethane resin compositions | |
| US4282876A (en) | Radiopaque polyurethane resin compositions | |
| US4250072A (en) | Radiopaque polyurethane resin compositions | |
| EP0566690B1 (en) | Torque resistant tubing | |
| US4563181A (en) | Fused flexible tip catheter | |
| US4657024A (en) | Medical-surgical catheter | |
| USRE25788E (en) | Medico-surgical tubes having integral connectors formed in their ends | |
| EP0513991B1 (en) | Multi-valve catheter for improved reliability | |
| US3529633A (en) | X-ray opaque tubing having a transparent stripe | |
| AU638936B2 (en) | Nylon-peba copolymer catheter | |
| EP0339799B1 (en) | Variable shaped catheter system and method for catheterization | |
| EP0125844B1 (en) | Valved two-way catheter | |
| US5554121A (en) | Intraluminal catheter with high strength proximal shaft | |
| EP1016422A1 (en) | Enhanched radiopacity of peripheral and central catheter tubing | |
| WO2001013021A1 (en) | Insulated intravenous administration tubing | |
| WO1982000413A1 (en) | Improved radiopaque medical tubing | |
| US20040260271A1 (en) | Extended fenestration catheter with internal coil and method of making the same | |
| BR112019021609A2 (en) | catheter tubes with adapted module response | |
| JPH0623034A (en) | Non-radiation transmitting soft polyu- rethane tubular material with kinking resistance and catether made of the same | |
| WO2000076564A1 (en) | Medical tubing | |
| CA2105499A1 (en) | Flexible catheter | |
| JP2523405B2 (en) | Catheter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |