JP2010148894A - Connecting structure of valve and connector of medical instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gastrostomy tube set, easy to use and clean, having little risk of contamination and improved in sealing performance between a valve and a connector. <P>SOLUTION: The valve 3 includes: a cylindrical part 21 cylindrically projected from a hub 9 of a tube to the outside, the tip of which is provided with an opening 23; a flange 24 formed on the outer periphery of the cylindrical part 21, a part of which is provided with a cutout 25; a thin film 28 blocking up the opening 23 and having elasticity; and a slit 29 formed in the thin film 28. The connector 4 includes: an inner cylinder part 36 pushing open the slit 29 to be inserted into the cylindrical part 21; an outer cylinder part 37 formed cylindrically in the periphery of the inner cylinder part 36 with a gap to which the cylindrical part 21 and the flange 24 are fitted; and a lug 38 projected from the inner periphery of the outer cylinder part 37 largely enough to pass through the cutout 25 of the flange 24 and engaged with the flange 24 by rotating the connector 4 around the axis of the inner cylinder part 36 after passing the cutout 25 to prevent the connector 4 from slipping off the valve 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a gastrostomy tube set used to supply fluids such as nutrients and medicines into the stomach through a fistula surgically constructed from the outer surface of a body such as a human to the stomach.

  Conventionally, a tube is attached to a fistula constructed from the outer surface of the body to the stomach, one end is left in the stomach, the other end is placed outside the body, a valve for opening and closing the tube, and one end is A gastrostomy tube set is known that includes a connector coupled to a valve, the other end coupled to a source of fluid such as nutrients or medicine, and a connector communicating the fluid source with the tube.

  The one end of the tube is provided with a balloon that expands in the stomach when air or sterilized water is introduced from the outside and adheres closely to the stomach inner wall. This tube set can easily fix and replace the tube in the fistula by inflating or deflating the balloon. Also, each time the fluid is injected into the stomach, the connector and fluid source can be used disposable.

  By the way, the valve of this tube set includes a housing having an opening communicating with the tube at a tip portion slightly exposed from the tube, and a valve body having a slit provided in a depth of several millimeters from the opening in the housing. Yes. A circumferential groove is formed slightly inward from the opening of the housing, and the circumferential groove and the opening are communicated with a cut groove extending in the axial direction. The connector has a substantially conical cylindrical portion that is inserted into the opening of the housing and pushes the slit, and a protrusion that protrudes outward from a base end portion of the substantially conical cylindrical portion.

  When connecting the connector to the valve, align the protrusion on the connector with the notch in the housing, insert a substantially conical tube into the opening of the housing, and then rotate the connector to attach the protrusion to the housing. It is accommodated in the circumferential groove. As a result, the connector is secured to the valve. When removing the connector, rotate the connector to align the protrusion with the notch in the housing, and then remove the connector from the opening in the housing.

  However, in the tube set, the valve body is formed in a few millimeters inward from the opening of the housing, and the circumferential groove and the cut groove are formed in the inside of the opening. Therefore, a cavity and a groove are formed in the inner part of the opening. The These cavities and grooves are where fluids and bacteria accumulate, but are difficult to clean and disinfect and are prone to contamination.

  An object of the present invention is to provide a gastrotomy tube set that solves the above-mentioned disadvantages, is easy to clean and disinfect, and has a low risk of contamination.

  In order to achieve the above object, the gastrostomy tube set of the present invention is attached to a fistula constructed from the outer surface of the body to the stomach, one end is placed in the stomach, and the other end is outside the body. A gastross comprising: a tube disposed; a valve for opening and closing the tube; a connector having one end coupled to the valve and the other end coupled to a fluid supply source, the fluid supply source communicating with the tube In the Tommy tube set, the valve is formed on the outer periphery of the cylindrical portion, the cylindrical portion having an opening protruding from the tube to the outside of the body and having an opening communicating with the tube at the tip. A flange having a notch, an elastic thin film that closes the opening of the tubular portion, and a slit formed in the thin film, and the connector pushes open the slit to open the inside of the tubular portion. Inserted into An inner cylinder part, an outer cylinder part formed in a cylindrical shape around the inner cylinder part with a gap in which the cylindrical part and the flange are fitted, and an inner circumference of the outer cylinder part, The flange protrudes in a size that can pass through the notch, and after passing through the notch, the connector is engaged with the flange by rotating about the axis of the inner cylinder portion to prevent the connector from coming off from the valve. And a lug.

  According to the present invention, when the connector is coupled to the valve, the lug of the connector is first positioned to align with the notch in the flange. Next, the inner cylindrical portion pushes the slit of the thin film to be inserted into the cylindrical portion, and the flange is cut through the flange. Thereafter, the connector is rotated about the axis of the inner cylinder portion, the lug is engaged with the flange, and the connector is prevented from coming off from the valve. Thereby, a valve and a connector can be connected easily and reliably.

  When the connector is not connected to the valve, the slit of the thin film is closed to close the opening at the tip of the cylindrical portion. Therefore, since the inside of the opening is not exposed, the risk of contamination from the outside is reduced, and cleaning and disinfection are facilitated.

  Also, when the inner cylinder part of the connector pushes the slit of the thin film of the valve and is inserted into the opening, the elastic thin film adheres to the outer peripheral surface of the inner cylinder part. Sealability is improved.

The perspective view which showed the state in the use position to the body of the gastrostomy tube set which is suitable embodiment of this invention. The front view of the 1st tube which comprises the tube set of FIG. The top view of the 1st tube of FIG. FIG. 4 is a partial cross-sectional view of the first tube taken along line 4-4 of FIG. FIG. 5 is a partial cross-sectional view of the bulb of FIG. 3 taken along line 5-5. The rear view of the connector which comprises the tube set of FIG. Sectional drawing of the connector along the 7-7 line | wire of FIG. The partial cross section figure which shows the state which connected the 1st tube of FIG. 1 and the connector. The perspective view seen from the back upper surface of the connector of other embodiments of the present invention. The perspective view seen from the front side of the connector of FIG.

  The preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a perspective view showing a gastrostomy tube set according to a preferred embodiment of the present invention in a use position on a body. FIG. 2 is a front view of a first tube constituting the tube set of FIG. FIG. 3 is a plan view of the first tube of FIG. FIG. 4 is a partial cross-sectional view of the first tube taken along line 4-4 of FIG. FIG. 5 is a partial cross-sectional view of the valve of FIG. 3 taken along line 5-5. 6 is a rear view of the connector constituting the tube set of FIG. FIG. 7 is a cross-sectional view of the connector taken along line 7-7 in FIG. FIG. 8 is a partial cross-sectional view showing a state in which the first tube and the connector of FIG.

  As shown in FIGS. 1 to 3, the tube set 1 is attached to a fistula constructed from the outer surface X of the body to the stomach, one end is placed in the stomach, and the other end is disposed outside the body. A first tube 2, a valve 3 provided in the first tube 2, and a connector 4 having one end coupled to the valve 3. Connected to the other end of the connector 4 is a second tube 5 communicated with a fluid supply source such as a fluid supply pack containing a fluid such as a nutrient or medicine (not shown).

  According to the tube set 1, the first tube 2 provided with the valve 3 is left in the body for a long period of time such as several months, and frequent replacement is unnecessary. On the other hand, the fluid supply source connected to the connector 4 via the connector 4 or the second tube 5 is connected to the first tube 2 outside the body for a relatively short time of about 12 to 24 hours and can be disposable. It becomes.

  The first tube 2 is made of a suitable medical material such as flexible silicone so as to facilitate attachment and replacement to the body. A fluid passage 6 communicates from one end placed in the stomach to the other end disposed outside the body, and feeds fluid such as nutrients and medicines into the stomach inside the first tube 2. Is provided.

  Around the end of the first tube 2 placed in the stomach, there is provided an inflatable balloon 7 formed of a relatively thin tube-like thin film made of a synthetic resin material for medical use. Inside the first tube 2, a second passage 8 having a small diameter extends along the one side of the fluid passage 6 over almost the entire length of the first tube 2, and one end communicates with the balloon 7. When air or sterilized water is fed into the balloon 7 through the second passage 8, the balloon 7 is inflated and closely contacts the opening of the fistula in the stomach inner wall. As a result, leakage of gastric juice and the like can be prevented, and the first tube 2 can be safely and easily placed in the body.

  A hub 9 having an outer diameter larger than that of the central portion mounted in the fistula is formed integrally with the first tube 2 at the other end disposed outside the body of the first tube 2. The hub 9 may be formed separately from the first tube 2 and assembled to the first tube 2 when the tube set 1 is used.

  On one side of the hub 9, a protruding portion 10 protruding in the diameter direction is formed. The protruding portion 10 is provided with a balloon valve 11, and the valve 11 communicates with the other end of the second passage 8 whose one end communicates with the balloon 7. When the valve 11 is in the open state, air or sterilized water is sent from the outside to inflate the balloon 7, and after the expansion, the valve 11 can be closed to prevent the air or sterilized water from being discharged. Is done.

  A cap 13 is provided on one side of the hub 9 opposite to the protruding portion 10 and is connected via a flexible plate-like connecting piece 12. The cap 13 is attached to the valve 3 for sealing when the connector 4 is not coupled to the valve 3. The cap 13 is provided with a tab 14 that facilitates pinching.

  As shown in FIG. 4, the fluid passage 6 extends in the axial direction inside the hub 9. A cavity 15 that accommodates and holds a part of the valve 3 is formed at the tip of the fluid passage 6. The cavity 15 includes a large-diameter portion that is expanded stepwise from the fluid passage 6 and a small-diameter portion that is slightly reduced in diameter from the large-diameter portion and opens to the outside of the hub 9. A circumferential groove is formed on the inner peripheral surface of the large diameter portion. The inner peripheral surface of the small diameter portion is formed in a tapered shape that tapers toward the opening.

  The valve 3 has a housing 16 composed of an outer housing part 17 and an inner housing part 18 held in the cavity 15 of the hub 9, and a valve body 19 held in the housing 16.

  The housing 16 is made of a suitable medical synthetic resin. The outer housing portion 17 includes a hollow large-diameter portion 20 that is fitted into the large-diameter portion of the cavity 15, and a tubular portion 21 that is fitted into the small-diameter portion of the cavity 15 and protrudes from the hub 9 to the outside in a tubular shape. Have In this embodiment, the cylindrical portion 21 protrudes from the hub 9 by about 3 mm. An opening 23 surrounded by an annular wall 22 formed in an inward flange shape is formed at the tip of the cylindrical portion 21. The opening 23 communicates with the fluid passage 6. The outer end surface of the annular wall 22 protrudes in an annular shape, and constitutes a seal that comes into close contact with the connector 4 when coupled to the connector 4. On the outer peripheral surface of the large diameter portion 20, there is provided a peripheral rib that fits into the peripheral groove of the large diameter portion of the cavity 15 and prevents the valve 3 from coming out of the hub 9.

  A substantially annular outward flange 24 having an outer diameter larger than that of the cylindrical portion 21 is formed on the outer periphery near the tip of the cylindrical portion 21. As shown in FIGS. 1 and 2, a notch 25 is formed in a part of the flange 24. As shown in FIGS. 1 and 3, a protrusion 26 extending along the tubular portion 21 toward the hub 9 is provided at one end of the flange 24 facing the notch 25.

  As shown in FIG. 4, the inner housing part 18 is fitted into the end of the outer housing part 17 opposite to the opening 23. The inner housing part 18 and the outer housing part 17 are preferably fixed to each other by ultrasonic welding, adhesive or the like. The inner housing portion 18 has a hollow portion 27 that expands in a tapered shape from the fluid passage 6 and allows the fluid passage 6 and the opening 23 to communicate with each other.

  The valve body 19 is formed in a substantially cup shape from an elastic medical elastomer material, and is fitted in close contact with each housing portion between the inner housing portion 18 and the outer housing portion 17.

  As shown in FIGS. 2 and 4, the opening 23 is closed by a substantially disk-shaped thin film 28 that constitutes a part of the valve body 19. The thin film 28 is formed with a slit 29 extending over substantially the entire length of the opening 23 in the diameter direction. When the slit 29 is opened, the opening 23 and the fluid passage 6 are communicated, and when the slit 29 is closed, the opening 23 and the fluid passage 6 are blocked. As shown in FIG. 5, a pair of ribs 30, 30 are formed on the inner surface of the thin film 28 so as to cross the slit 29. The ribs 30, 30 reinforce the thin film 28 and the slit 29 is closed. Energize as follows.

  As shown in FIG. 4, an outer annular flange 31 is provided on the outer periphery of the end opposite to the thin film 28 of the valve body 19, and the annular flange 31 is formed between the inner housing portion 18 and the outer housing portion 17. Sandwiched between. Preferably, an annular protrusion 32 toward the annular flange 31 is formed on the outer housing portion 17, and an annular protrusion 33 toward the annular flange 31 is formed on the inner housing portion 18. These annular protrusions 32 and 32 hold the annular flange 31 so as to prevent the valve body 19 from moving when the slit 29 is opened and closed.

  The inner peripheral surface of the outer housing part 17 is formed to be slightly smaller in diameter than the outer peripheral surface of the valve body 19, whereby the valve body 19 is closely fitted in the outer housing part 17 and the slit 29 is closed. Apply pressure so that.

  As shown in FIGS. 1, 6, and 7, the connector 4 has a first end 34 that is coupled to the valve 3, and a second end 35 that is inserted into and coupled to the second tube 5. . The connector 4 is formed in a substantially elbow shape in which the first end portion 34 and the second end portion 35 form an angle of 90 degrees. The first end 34 pushes open the slit 29 of the thin film 28 of the bulb 3 to be inserted into the cylindrical portion 21, and the inner cylindrical portion 36 has a gap around the inner cylindrical portion 36. And an outer cylinder part 37 that is formed in a cylindrical shape coaxially with a lug 38 that protrudes in the radial direction from the inner periphery of the outer cylinder part 37 toward the inner cylinder part 36. Inside the connector 4, a passage 39 that opens at the tip of the inner cylinder portion 36 and a passage 40 that opens at the tip of the second end portion 35 and has a larger diameter than the passage 39 communicate with each other.

  As shown in FIG. 8, the outer diameter of the inner cylindrical portion 36 is only slightly smaller than the diameter of the opening 23. When the inner cylinder part 36 pushes the slit 29 open and is inserted into the cylindrical part 21, the elastic thin film 28 comes into close contact with the outer peripheral surface of the inner cylinder part 36. The sealing performance of the is improved. Further, the connector 4 is stably held by the valve 3.

  The outer cylinder part 37 has a gap between the inner cylinder part 36 and an inner diameter slightly larger than the outer diameter of the flange 24 of the valve 3. When the inner cylindrical portion 36 is inserted into the cylindrical portion 21, the distal end portion of the cylindrical portion 21 and the flange 23 are fitted into the gap.

  The lug 38 is formed so that the circumferential width is slightly smaller than the circumferential width of the notch 25 so that the lug 38 can pass through the notch 25 of the flange 24. Further, the gap between the lug 38 and the inner cylindrical portion 36 is formed at such a distance that the cylindrical portion 21 can be inserted / removed and the flange 24 cannot be inserted / removed. Further, the gap between the bottom wall 41 and the lug 38 connecting the inner cylinder portion 36 and the outer cylinder portion 37 is the axial direction between the outer end surface of the annular wall 22 of the cylindrical portion 22 and the end surface of the flange 23 on the hub 9 side. It is formed at a distance larger than the width of. Thus, as shown in FIG. 8, in order to insert the inner cylinder portion 36 into the cylindrical portion 21 until the bottom wall 41 of the connector 4 is in close contact with the outer end surface of the annular wall 21 of the cylindrical portion 21, After positioning 38 in alignment with notch 25 in flange 24, it is necessary to allow lug 38 to pass completely through notch 25. Thereafter, the connector 4 is rotated to move the lug 38 in the circumferential direction and engage with the flange 24, so that the connector 4 is prevented from being detached from the valve 3 and coupled.

  In order to facilitate the positioning of the lug 38 of the connector 4 and the notch 25 of the flange 24, it is preferable to provide a hole or other mark indicating the position of the lug 38 in the connector 4 as shown in FIG. .

  As shown in FIG. 8, at the position where the valve 3 and the connector 4 are connected so as not to come off, the thin film 28 of the valve 3 is in close contact with the outer peripheral surface of the inner cylindrical portion 36 of the connector 4 to prevent leakage. The connection with the connector 4 is made firm. The outer end surface of the annular wall 22 of the valve 3 and the bottom wall 41 of the connector 4 are in close contact to prevent leakage.

  Since the flange 24 is formed in a substantially annular shape excluding the notch 25, the connector 4 can be rotated to a plurality of positions while keeping the connector 4 from coming off.

  The protrusion 26 provided on the flange 24 abuts the lug 38 at a position where the lug 38 of the connector 4 is aligned with the notch 25, and prevents rotation from the position beyond the protrusion 26. As a result, the connector 4 can be detached only by rotating in one direction, so that the connector 4 is prevented from being inadvertently detached and the safety in use of the tube set 1 is improved.

  When the connector 4 is removed from the coupling position with the valve 3 as shown in FIG. 8, the connector 4 is first rotated to a position where the lug 38 is aligned with the notch 25, and then the connector 4 is removed from the valve 3. As a result, the thin film 28 of the valve 3 returns to the position where it is in close contact with the annular wall 22 and the slit 29 is closed.

  When the connector 4 is not coupled and the slit 29 is closed, the opening 23 is closed by a thin film 28 that is in close contact with the inside of the annular wall 22 surrounding the opening 23. Thereby, since the inner part of the opening 23 is not exposed, there is little risk of being contaminated from the outside, and cleaning and disinfection are easy.

  As an example of a preferred embodiment, valve 3 may not be able to couple to any type of source other than the fluid source that the tube set of the present invention is intended to use. For example, the diameter of the flange 24 of the valve 3 is made larger than the diameter of the coupling portion of the conventional source. This makes it impossible to accidentally connect a supply source that is not scheduled to be used to the valve 3, thus improving safety.

  Next, a connector according to another embodiment of the present invention will be described. FIG. 9 is a perspective view of a connector according to another embodiment of the present invention as viewed from above the back surface. FIG. 10 is a perspective view of the connector of FIG. 9 viewed from the front side.

  As shown in FIGS. 9 and 10, the connector 50 has a first end 51 coupled to the valve 3 and a second end 52 coupled to a second tube (not shown). The first end portion 51 has an inner cylindrical portion 53, an outer cylindrical portion 54, and a lug 55 in the same manner as the first end portion 34 of the connector 4 shown in FIG. 1, FIG. 6, and FIG. And the function is the same as that of the first end 34. The connector 50 is used in the same manner as the connector 4, and the only difference is that the first end 51 and the second end 52 of the connector 50 are formed in a substantially linear shape.

  The second end 52 is easy to pinch and rotate the connector 50 when coupling the connector 50 to the valve 3 of the first tube 2 and the insertion hole 56 into which the second tube (not shown) is inserted and coupled. And a substantially triangular plane 57. Further, the vertex of the substantially triangular shape of the plane 57 indicates the position where the notch 25 of the flange 24 of the valve 3 and the lug 55 of the connector 50 are aligned, and the positioning of the notch 25 and the lug 55 is facilitated. .

  Although the present invention has been described with reference to the preferred embodiments shown in the accompanying drawings, the embodiments can be modified within the scope of the present invention.

1. ・ Gastrotomy tube set, 2. ・ First tube, 3. ・ Valve, 4. ・ Connector, 5. ・ Second tube, 6. ・ Fluid passage, 9. ・ Hub, 15. ・ Cavity, 16 .... Housing, 17 .... Outer housing part, 18 .... Inner housing part, 19 .... Valve body, 21 .... Cylindrical part, 22 .... Annular wall, 23 ... Open, 24 ... Flange, 25.・ Notch 26 ・ ・ Protrusion 28 ・ ・ Thin film 29 ・ ・ Slit 34 ・ ・ First end 35 ・ ・ Second end 36 ・ ・ Inner cylinder 37 ・ ・ Outer cylinder 38 ..Lug, 39, 40..Passage, 41..Bottom wall, 50..Connector, 51..First end, 52..Second end, 53..Inner cylinder, 54..Outer cylinder Part, 55 lag.

Claims (1)

A tube which is attached to a fistula constructed from the outer surface of the body to the stomach, one end is placed in the stomach, the other end is disposed outside the body, a valve for opening and closing the tube, and one end of the valve A gastrostomy tube set comprising a connector coupled to the fluid source, the other end coupled to a fluid source, and a connector communicating the fluid source with the tube. A cylindrical portion having an opening communicating with the tube at the tip, a flange formed on the outer periphery of the cylindrical portion and having a notch in a part thereof, and a resilient member that closes the opening of the cylindrical portion A thin film and a slit formed in the thin film, and the connector pushes open the slit to be inserted into the cylindrical portion, and around the inner cylindrical portion, The gap in which the cylindrical part and the flange are fitted And an outer cylinder portion that is formed into a cylindrical shape, and protrudes to an inner periphery of the outer cylinder portion with a size that can pass through the notch of the flange, and the connector is connected to the inner cylinder portion after passing through the notch. And a lug for engaging the flange to prevent the connector from coming off from the valve by rotating around the axis of the gastrostomy tube set.

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