CA1136511A - Catheter with valve assembly - Google Patents
Catheter with valve assemblyInfo
- Publication number
- CA1136511A CA1136511A CA000320625A CA320625A CA1136511A CA 1136511 A CA1136511 A CA 1136511A CA 000320625 A CA000320625 A CA 000320625A CA 320625 A CA320625 A CA 320625A CA 1136511 A CA1136511 A CA 1136511A
- Authority
- CA
- Canada
- Prior art keywords
- valve element
- catheter
- seat
- sealing surface
- lumen
- 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
Landscapes
- Media Introduction/Drainage Providing Device (AREA)
Abstract
CATHETER WITH VALVE ASSEMBLY
ABSTRACT OF THE DISCLOSURE
A catheter comprising, a conduit having a lumen, and a valve assembly for the lumen. The valve assembly has a housing having a cavity communicating with the lumen, a port, and a seat extending peripherally around the port. The valve assembly also has a valve element of elastic material received in the cavity and having a first portion defining a surface for sealingly engag-ing against the seat. The valve element has a second portion con-nected to the housing at a location such that it stretches respon-sive to contact against the first portion through the port. The second portion biases the sealing surface of the first portion against the seat to close the valve, and the second portion per-mits movement of the first portion away from the seat for passage of fluid between the sealing surface and the seat. The valve element defines an opening remote the surface of the valve element bounded by the sealing surface to permit further passage of the fluid to the lumen.
ABSTRACT OF THE DISCLOSURE
A catheter comprising, a conduit having a lumen, and a valve assembly for the lumen. The valve assembly has a housing having a cavity communicating with the lumen, a port, and a seat extending peripherally around the port. The valve assembly also has a valve element of elastic material received in the cavity and having a first portion defining a surface for sealingly engag-ing against the seat. The valve element has a second portion con-nected to the housing at a location such that it stretches respon-sive to contact against the first portion through the port. The second portion biases the sealing surface of the first portion against the seat to close the valve, and the second portion per-mits movement of the first portion away from the seat for passage of fluid between the sealing surface and the seat. The valve element defines an opening remote the surface of the valve element bounded by the sealing surface to permit further passage of the fluid to the lumen.
Description
BACKGROUND OF THE INVENTION
The ~present invention relates to catheters, and more particularly to valve assemblies for catheters.
An assortment of catheters, such as Foley catheters and endotracheal tubes, have been proposed for use in patients.
Many of the catheters include an inflatable balloon which is used for various purposes, such as sealing a passage in the patient or retaining the catheter in place in the patient. The cathe-ters normally have a valve and a lumen communicating between the valve and the balloon to permit inflation and deflation of the balloon.
Although a number of valve structures have been uti-lized in prior catheters, most of the valves are of relatively complicated construction requiring an excessive number of parts thus rendering the valve more costly than necessary. The cathe-ters are normally considered a disposable item, and are discarded after a single use. Accordingly, it is desirable to provide the catheters at a minimal cost to the patient.
SUMMARY OF THE INVENTION
-A principal feature of the present invention is the provision of a catheter with an improved valve assembly of simplified construction and reduced cost.
The catheter of the present invention comprises, a con-duit having a lumen, and a valve assembly for the lumen. The valve assembly has a housing having a cavity communicating with the lumen, a port, and a seat extending peripherally around the port. The valve assembly also has a valve element of elastic material received in the cavity and having a first portion defin-ing a surface for sealingly engaging against the seat. The valve element has a second portion connected to the housing at a 11;~`~..~.5~1 location such that it stretches responsive to contact against the first portion through the port.
A feature of the present invention is that the second portion of the valve element biases the sealing surface of the first portion against the seat to cause sealing engagement between the sealing surface and the seat and close the valve.
Another feature of the invention is that the second portion stretches and permits movement of the first portion away from the seat to permit passage of fluid between the sealing sur-face and the seat.
Thus, a feature of the invention is that the valveassembly provides a reliable closure for the catheter lumen which may be readily opened by contacting the first portion with the tip of a syringe through the port.
Still another feature of the invention is that the valve assembly may be constructed from few noncostly parts, thus resulting in a relatively inexpensive structure of the valve assembly for the catheter.
Further features will become more fully apparent in the following description of the embodiments of this invention and from the appended claims.
DESCRIPTION OF THE DRAWINGS
In the drawings:
Fig. 1 is a fragmentary elevational view, partly broken away, of a catheter including a valve assembly of the present invention;
Fig. 2 is a sectional view of the valve assembly of the present invention;
Fig. 3 is an upper plan view, taken partly in section, 1~3~.5~
of a valve element for the valve assembly of Fig. 2;
Fig. 4 is a fragmentary elevational view of an annular member of the valve assembly housing which defines a valve seat;
and Fig. 5 is a sectional view illustrating use of the valve assembly of Fig. 2.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring now to Fig. l, there is shown a catheter gen-erally designated 10 having an elongated shaft 12 and a valve assembly 18. Although for convenience the valve assembly of the invention will be described in connection with a urinary cathe-ter, it will be understood that the valve assembly may be uti-lized in conjunction with any other suitable catheter, such as an endotracheal tube or embolectomy catheter. The catheter 10 has an inflatable balloon 14, and a side arm 16 extending out-wardly from the shaft 12, with the valve assembly 18 being secured to an outer end 17 of the side arm 16. The catheter has an inflation lumen 20 extending through the side arm 16 and a wall of the catheter shaft 12 in order to establish communica-tion between the valve assembly 18 and the balloon 14 for infla-tion and deflation thereof. The catheter 10 also has one or more drainage eyes 22 adjacent a distal end 24 of the catheter 10, and a main or drainage lumen 26 communicating with the drain-age eyes 22 and extending through the shaft 12 to a proximal end 28 of the catheter 10.
In use, the distal end 24 of the catheter 10 is passed through the patient's urethra until the drainage eyes 22 and the balloon 14 are located in the patient's bladder, with the proxi-mal end 28 of the catheter 10 located outside the patient's body.
1~3~
The balloon 14 is inflated through the valve assembly 18 and the inflation lumen 20 in order to retain the catheter in place in the patient. During catheterization, urine drains through the drainage eyes 22, the main lumen 26, and a drainage tube (not shown) to a bag (not shown) for collection of urine therein.
Referring now to Figs. 2-4, the valve assembly 18 has a housing 30 defining a cavity 32, and a valve element 34 of elastic material received in the cavity 32. The housing 30 has an outer member 36 having an outer or proximal wall 38 and a cyl-indrical side wall 40 extending from edges of the outer wall 38.
The outer member 36 of the housing 30 also has an annular member 42 extending from the outer wall 38 into the cavity 32, with the annular member 42 defining a tapered port 44. The annular member 42 has a tapered portion 46 defining an annular valve seat 48 at an inner end of the annular member 42 extending peripherally around the port 44.
The housing 30 also has an inner member 50 having a cylindrical side wall 52 snugly received within the side wall 40 of the outer member 36. The inner member 50 has an inner or dis-tal wall 54 defining an inner portion of the cavity 32, and a tubular section 56 extending distally from the inner wall 54.
With reference to Figs. 1 and 2, the tubular section 56 is received in the outer end 17 of the catheter side arm 16 in order to establish communication between the cavity 32 of the valve assembly 18 and the inflation lumen 20 of the catheter 10.
With reference to Figs. 2-4, the valve element 34 has a generally cylindrical first portion 58 having a sealing surface 60 on its inner face defined by an annular groove 62 which receives the tapered valve seat 48. The first portion 58 has a transverse slot 64 intermediate the sealing surface 60 for a 1~3~
purpose which will be described below. The valve element 34 also has a second portion 66 having an annular outwardly directed flange 68f and a relatively thin annular strap section 72 extend-ing between and connecting the flange 68 and first portion 58.
The valve element 34 has one or more openings 70 which extend through the valve element at a location remote the surface of the first valve element portion 58 bounded by the sealing surface 60. In the particular embodiment shown, the openings 70 extend through the strap section 72, although it will become apparent that the openings (70') may extend through side portions of the first valve element portion 58 outside the groove 62, as illus-trated in Fig. 2, if desired. As shown in Fig. 2, the flange 68 has a width approximately equal to the distance between the annu-lar member 42 and the side wall 40 of the outer member 36. The valve element flange 68 is connected to the housing at the outer end of the cavity 32 between the outer wall 38 of the outer hous- ¦
ing member 36 and an outer end 53 of the inner member side wall 52. In this manner, the valve element 34 is secured in the hous-ing cavity 32 with the first portion 58 of the valve element located over the inner end of the housing annular member 42. The strap section 72 of the valve element has a suitable length such that the valve seat 48 is received in the groove 62 with the seat engaging against the sealing surface 60.
In use, with reference to Fig. 2, the strap section 72 of the valve element 34 biases the first portion 58 and asso-ciated sealing surface 60 against the valve seat 48, such that the valve seat sealingly engages against the sealing surface 60.
Thus, in its normal configuration, the valve element 34 closes the valve assembly 18 and prevents passage of fluid between the port 44 and cavity 32.
~5-1~3~S~
With reference to Figs. 1 and 4, when it is desired to inflate the balloon 14 of the catheter 10, the tip T of a syr-inge S may be inserted into the housing port 44 until the tip T
engages against the valve element first portion 58 and moves the sealing surface 60 away from the valve seat 48. Next the syr-inge S is pumped, and fluid passes through the tip T and through the slot 64 of the first portion 58 which prevents obstruction of fluid passing from the syringe tip. The fluid then passes through the openings 70 of the strap section 72 into the remain-ing portion of the cavity 32, after which the fluid passes - through the inflation lumen 20 to the balloon 14 for inflation thereof. The syringe is thus pumped until the balloon is prop-erly inflated, and the syringe is then removed from the valve assembly 18. In turn, the strap section 72 again biases the first portion 58 and-sealing surface 60 into sealing engagement against the valve seat 48 to close the valve and prevent passage of fluid from the balloon through the valve assembly 18. In this configuration, back pressure from the balloon 14 causes the ; valve element first portion 58 and associated sealing surface 60 to tightly engage against the valve seat 48 in order to obtain an excellent seal between the valve element 34 and valve seat 48 during catheterization.
After catheteriæation has been completed, the syringe tip T is again inserted through the port 44 to stretch the strap section 72 and move the valve element first portion 58 away from the valve seat 48. The syringe may then be utilized to aspirate the fluid from the balloon through the inflation lumen 20 and the valve assembly 18 into the syringe. Alternatively, any suit-able instrument may be passed through the port 44 in order to move the valve element first portion 58 away from the valve seat ~3~i5~1 48, such that the instrument opens the valve and releases the fluid from the balloon.
Thus, in accordance with the present invention, the valve assembly may be constructed from few and relatively inex-pensive parts in order to reduce the cost of the disposable cath-eter to the hospital and patient. In addition, the valve assem-bly functions in an excellent manner to permit inflation and deflation of the balloon. In a preferred form, the valve ele-ment 34 may be constructed from any suitable elastic material, such as rubber. The inner member 50 and outer member 36 of the housing may be molded from a suitable plastic, such as polyvinyl-chloride or polyethylene.
The foregoing detailed description is given for clear-ness of understanding only, and no unnecessary limitations should be understood therefrom, as modifications will be obvious to those skilled in the art.
The ~present invention relates to catheters, and more particularly to valve assemblies for catheters.
An assortment of catheters, such as Foley catheters and endotracheal tubes, have been proposed for use in patients.
Many of the catheters include an inflatable balloon which is used for various purposes, such as sealing a passage in the patient or retaining the catheter in place in the patient. The cathe-ters normally have a valve and a lumen communicating between the valve and the balloon to permit inflation and deflation of the balloon.
Although a number of valve structures have been uti-lized in prior catheters, most of the valves are of relatively complicated construction requiring an excessive number of parts thus rendering the valve more costly than necessary. The cathe-ters are normally considered a disposable item, and are discarded after a single use. Accordingly, it is desirable to provide the catheters at a minimal cost to the patient.
SUMMARY OF THE INVENTION
-A principal feature of the present invention is the provision of a catheter with an improved valve assembly of simplified construction and reduced cost.
The catheter of the present invention comprises, a con-duit having a lumen, and a valve assembly for the lumen. The valve assembly has a housing having a cavity communicating with the lumen, a port, and a seat extending peripherally around the port. The valve assembly also has a valve element of elastic material received in the cavity and having a first portion defin-ing a surface for sealingly engaging against the seat. The valve element has a second portion connected to the housing at a 11;~`~..~.5~1 location such that it stretches responsive to contact against the first portion through the port.
A feature of the present invention is that the second portion of the valve element biases the sealing surface of the first portion against the seat to cause sealing engagement between the sealing surface and the seat and close the valve.
Another feature of the invention is that the second portion stretches and permits movement of the first portion away from the seat to permit passage of fluid between the sealing sur-face and the seat.
Thus, a feature of the invention is that the valveassembly provides a reliable closure for the catheter lumen which may be readily opened by contacting the first portion with the tip of a syringe through the port.
Still another feature of the invention is that the valve assembly may be constructed from few noncostly parts, thus resulting in a relatively inexpensive structure of the valve assembly for the catheter.
Further features will become more fully apparent in the following description of the embodiments of this invention and from the appended claims.
DESCRIPTION OF THE DRAWINGS
In the drawings:
Fig. 1 is a fragmentary elevational view, partly broken away, of a catheter including a valve assembly of the present invention;
Fig. 2 is a sectional view of the valve assembly of the present invention;
Fig. 3 is an upper plan view, taken partly in section, 1~3~.5~
of a valve element for the valve assembly of Fig. 2;
Fig. 4 is a fragmentary elevational view of an annular member of the valve assembly housing which defines a valve seat;
and Fig. 5 is a sectional view illustrating use of the valve assembly of Fig. 2.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring now to Fig. l, there is shown a catheter gen-erally designated 10 having an elongated shaft 12 and a valve assembly 18. Although for convenience the valve assembly of the invention will be described in connection with a urinary cathe-ter, it will be understood that the valve assembly may be uti-lized in conjunction with any other suitable catheter, such as an endotracheal tube or embolectomy catheter. The catheter 10 has an inflatable balloon 14, and a side arm 16 extending out-wardly from the shaft 12, with the valve assembly 18 being secured to an outer end 17 of the side arm 16. The catheter has an inflation lumen 20 extending through the side arm 16 and a wall of the catheter shaft 12 in order to establish communica-tion between the valve assembly 18 and the balloon 14 for infla-tion and deflation thereof. The catheter 10 also has one or more drainage eyes 22 adjacent a distal end 24 of the catheter 10, and a main or drainage lumen 26 communicating with the drain-age eyes 22 and extending through the shaft 12 to a proximal end 28 of the catheter 10.
In use, the distal end 24 of the catheter 10 is passed through the patient's urethra until the drainage eyes 22 and the balloon 14 are located in the patient's bladder, with the proxi-mal end 28 of the catheter 10 located outside the patient's body.
1~3~
The balloon 14 is inflated through the valve assembly 18 and the inflation lumen 20 in order to retain the catheter in place in the patient. During catheterization, urine drains through the drainage eyes 22, the main lumen 26, and a drainage tube (not shown) to a bag (not shown) for collection of urine therein.
Referring now to Figs. 2-4, the valve assembly 18 has a housing 30 defining a cavity 32, and a valve element 34 of elastic material received in the cavity 32. The housing 30 has an outer member 36 having an outer or proximal wall 38 and a cyl-indrical side wall 40 extending from edges of the outer wall 38.
The outer member 36 of the housing 30 also has an annular member 42 extending from the outer wall 38 into the cavity 32, with the annular member 42 defining a tapered port 44. The annular member 42 has a tapered portion 46 defining an annular valve seat 48 at an inner end of the annular member 42 extending peripherally around the port 44.
The housing 30 also has an inner member 50 having a cylindrical side wall 52 snugly received within the side wall 40 of the outer member 36. The inner member 50 has an inner or dis-tal wall 54 defining an inner portion of the cavity 32, and a tubular section 56 extending distally from the inner wall 54.
With reference to Figs. 1 and 2, the tubular section 56 is received in the outer end 17 of the catheter side arm 16 in order to establish communication between the cavity 32 of the valve assembly 18 and the inflation lumen 20 of the catheter 10.
With reference to Figs. 2-4, the valve element 34 has a generally cylindrical first portion 58 having a sealing surface 60 on its inner face defined by an annular groove 62 which receives the tapered valve seat 48. The first portion 58 has a transverse slot 64 intermediate the sealing surface 60 for a 1~3~
purpose which will be described below. The valve element 34 also has a second portion 66 having an annular outwardly directed flange 68f and a relatively thin annular strap section 72 extend-ing between and connecting the flange 68 and first portion 58.
The valve element 34 has one or more openings 70 which extend through the valve element at a location remote the surface of the first valve element portion 58 bounded by the sealing surface 60. In the particular embodiment shown, the openings 70 extend through the strap section 72, although it will become apparent that the openings (70') may extend through side portions of the first valve element portion 58 outside the groove 62, as illus-trated in Fig. 2, if desired. As shown in Fig. 2, the flange 68 has a width approximately equal to the distance between the annu-lar member 42 and the side wall 40 of the outer member 36. The valve element flange 68 is connected to the housing at the outer end of the cavity 32 between the outer wall 38 of the outer hous- ¦
ing member 36 and an outer end 53 of the inner member side wall 52. In this manner, the valve element 34 is secured in the hous-ing cavity 32 with the first portion 58 of the valve element located over the inner end of the housing annular member 42. The strap section 72 of the valve element has a suitable length such that the valve seat 48 is received in the groove 62 with the seat engaging against the sealing surface 60.
In use, with reference to Fig. 2, the strap section 72 of the valve element 34 biases the first portion 58 and asso-ciated sealing surface 60 against the valve seat 48, such that the valve seat sealingly engages against the sealing surface 60.
Thus, in its normal configuration, the valve element 34 closes the valve assembly 18 and prevents passage of fluid between the port 44 and cavity 32.
~5-1~3~S~
With reference to Figs. 1 and 4, when it is desired to inflate the balloon 14 of the catheter 10, the tip T of a syr-inge S may be inserted into the housing port 44 until the tip T
engages against the valve element first portion 58 and moves the sealing surface 60 away from the valve seat 48. Next the syr-inge S is pumped, and fluid passes through the tip T and through the slot 64 of the first portion 58 which prevents obstruction of fluid passing from the syringe tip. The fluid then passes through the openings 70 of the strap section 72 into the remain-ing portion of the cavity 32, after which the fluid passes - through the inflation lumen 20 to the balloon 14 for inflation thereof. The syringe is thus pumped until the balloon is prop-erly inflated, and the syringe is then removed from the valve assembly 18. In turn, the strap section 72 again biases the first portion 58 and-sealing surface 60 into sealing engagement against the valve seat 48 to close the valve and prevent passage of fluid from the balloon through the valve assembly 18. In this configuration, back pressure from the balloon 14 causes the ; valve element first portion 58 and associated sealing surface 60 to tightly engage against the valve seat 48 in order to obtain an excellent seal between the valve element 34 and valve seat 48 during catheterization.
After catheteriæation has been completed, the syringe tip T is again inserted through the port 44 to stretch the strap section 72 and move the valve element first portion 58 away from the valve seat 48. The syringe may then be utilized to aspirate the fluid from the balloon through the inflation lumen 20 and the valve assembly 18 into the syringe. Alternatively, any suit-able instrument may be passed through the port 44 in order to move the valve element first portion 58 away from the valve seat ~3~i5~1 48, such that the instrument opens the valve and releases the fluid from the balloon.
Thus, in accordance with the present invention, the valve assembly may be constructed from few and relatively inex-pensive parts in order to reduce the cost of the disposable cath-eter to the hospital and patient. In addition, the valve assem-bly functions in an excellent manner to permit inflation and deflation of the balloon. In a preferred form, the valve ele-ment 34 may be constructed from any suitable elastic material, such as rubber. The inner member 50 and outer member 36 of the housing may be molded from a suitable plastic, such as polyvinyl-chloride or polyethylene.
The foregoing detailed description is given for clear-ness of understanding only, and no unnecessary limitations should be understood therefrom, as modifications will be obvious to those skilled in the art.
Claims (14)
1. A catheter, comprising:
(a) a conduit having a lumen; and (b) a valve assembly for said lumen, comprising:
a housing having a cavity communicating with the lumen, a port, and a seat extending peripherally around the port; and a valve element of elastic material received in the cavity and having a first portion defining a sur-face for sealingly engaging the seat, and a second portion con-nected to the housing at a location such that it stretches respon-sive to contact against said first portion through the port, said second portion biasing said sealing surface of the first portion against the seat to close the valve, and said second portion per-mitting movement of the first portion away from the seat for passage of fluid between said sealing surface and the seat, with said valve element defining opening means remote the surface of the valve element bounded by said sealing surface to permit fur-ther passage of the fluid to said lumen.
(a) a conduit having a lumen; and (b) a valve assembly for said lumen, comprising:
a housing having a cavity communicating with the lumen, a port, and a seat extending peripherally around the port; and a valve element of elastic material received in the cavity and having a first portion defining a sur-face for sealingly engaging the seat, and a second portion con-nected to the housing at a location such that it stretches respon-sive to contact against said first portion through the port, said second portion biasing said sealing surface of the first portion against the seat to close the valve, and said second portion per-mitting movement of the first portion away from the seat for passage of fluid between said sealing surface and the seat, with said valve element defining opening means remote the surface of the valve element bounded by said sealing surface to permit fur-ther passage of the fluid to said lumen.
2. The catheter of claim 1 wherein said housing includes an annular member extending into said cavity, with said annular member defining said port and defining said seat at an inner end of the annular member.
3. The catheter of claim 2 wherein said annular mem-ber defines a tapered port.
4. The catheter of claim 2 wherein said annular mem-ber has an inner tapered edge defining said seat.
5. The catheter of claim 4 wherein said first portion of the valve element includes an annular groove defining the sealing surface to receive said seat.
6. The catheter of claim 5 wherein said first portion of the valve element includes a transverse slot inside said groove and aligned with the port.
7. The catheter of claim 2 wherein said second portion of the valve element is connected to the housing adjacent an outer end of the annular member.
8. The catheter of claim 1 wherein said opening means extends through the second portion of the valve element.
9. The catheter of claim 1 wherein said second portion of the valve element is connected to the housing adjacent an outer end of the cavity.
10. The catheter of claim 1 wherein said second portion of the valve element comprises, an outwardly directed flange adjacent an outer end of the valve element, and a relatively thin strap section connecting said flange and the first portion of the valve element.
11. The catheter of claim 10 wherein said housing has an outer member having a side wall and an outer wall, and an inner member having a sidewall received inside the side wall of the outer member, with said flange of the valve element being secured between an outer end of the inner member side wall and the outer wall of said outer member.
12. The catheter of claim 1 wherein the first portion of the valve element has a groove defining the sealing surface to receive said seat.
13. The catheter of claim 1 wherein said first portion of the valve element has a transverse slot intermediate said sealing surface and aligned with the port.
14. A catheter, comprising:
(a) a conduit having a lumen; and (b) a valve assembly for said lumen, comprising:
a housing including an outer member having an outer wall and a side wall, and an inner member having a side wall received inside the side wall of the outer member, with said outer and inner members defining a cavity communicating with said lumen, and with said outer member having an annular member extend-ing from said outer wall into the cavity, said annular member defining a port and having a seat at an inner end of the annular member; and a valve element of elastic material having a first portion defining a surface for sealingly engaging against the seat and having a transverse slot intermediate the sealing surface, and a second portion having an outwardly directed flange adjacent an outer end of the valve element and a strap section extending between said flange and said first portion of the valve element, with said flange being secured between an outer end of the inner member side wall and the outer wall of the outer hous-ing member adjacent an outer end of the cavity, said strap sec-tion biasing the sealing surface of the first valve element por-tion against the seat, and said strap section stretching respon-sive to contact against the first portion through the port for passage of fluid between the sealing surface and seat, with said valve element defining opening means remote the surface bounded by the sealing surface to permit further passage of fluid to said lumen.
(a) a conduit having a lumen; and (b) a valve assembly for said lumen, comprising:
a housing including an outer member having an outer wall and a side wall, and an inner member having a side wall received inside the side wall of the outer member, with said outer and inner members defining a cavity communicating with said lumen, and with said outer member having an annular member extend-ing from said outer wall into the cavity, said annular member defining a port and having a seat at an inner end of the annular member; and a valve element of elastic material having a first portion defining a surface for sealingly engaging against the seat and having a transverse slot intermediate the sealing surface, and a second portion having an outwardly directed flange adjacent an outer end of the valve element and a strap section extending between said flange and said first portion of the valve element, with said flange being secured between an outer end of the inner member side wall and the outer wall of the outer hous-ing member adjacent an outer end of the cavity, said strap sec-tion biasing the sealing surface of the first valve element por-tion against the seat, and said strap section stretching respon-sive to contact against the first portion through the port for passage of fluid between the sealing surface and seat, with said valve element defining opening means remote the surface bounded by the sealing surface to permit further passage of fluid to said lumen.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US87417978A | 1978-02-01 | 1978-02-01 | |
| US874,179 | 1978-02-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1136511A true CA1136511A (en) | 1982-11-30 |
Family
ID=25363164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000320625A Expired CA1136511A (en) | 1978-02-01 | 1979-01-31 | Catheter with valve assembly |
Country Status (2)
| Country | Link |
|---|---|
| BR (1) | BR7900545A (en) |
| CA (1) | CA1136511A (en) |
-
1979
- 1979-01-30 BR BR7900545A patent/BR7900545A/en unknown
- 1979-01-31 CA CA000320625A patent/CA1136511A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BR7900545A (en) | 1979-08-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |