JPH11192302A - Medical fluid flow switching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluid channel switching device for a medical system, in particular, a CAPD, which can easily perform a series of channel switching operations.
(Persistent peritoneal dialysis device) A fluid flow switching device of a CAPD (continuous peritoneal dialysis device) system that can easily perform a series of flow switching operations of a fluid flow switching device of a system and has good operability. provide. A housing having a rotatable shaft, a cam that rotates in conjunction with a rotation operation of the shaft, a port capable of holding the cam, and having a port portion connected to one end of a liquid feeding tube, and the port portion Fluid passage switching for medical use, comprising: a sheet-like member provided in close proximity to the other end opening of the port; and press-contact means for pressing the sheet-like member against the other end opening of the port portion in conjunction with rotation of the cam. apparatus.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical fluid channel switching device, and more particularly to a medical fluid channel switching device used for switching channels in a CAPD (continuous peritoneal dialysis machine) system.

[0002]

2. Description of the Related Art (1) In a CAPD (continuous peritoneal dialysis machine) system, as shown in FIG. 1, a first tube 1 connected to a catheter implanted in a patient's body and a first tube connected to the first tube. A second tube 2 connected to the other end of the Y-shaped tube 4 and connected to a dialysate bag 5 for supplying a new dialysate to the patient, and a dialysate stored in the abdominal cavity of the patient for a certain period of time; The three clamps C1, C2, and C3 provided on the respective tubes of the third tube 3 connected to the drainage bag 6 for discharging the liquid must be operated according to the procedure shown in the table below. No.

[0003]

[Table 1] In the preceding table, the number of → is the number of operations.

[0004] In order to perform the above-described series of operations, the patient needs 8
Since the clamp must be opened and closed twice, the procedure is complicated, which may cause an erroneous operation, and makes it difficult to introduce the system into a new patient. To solve such a problem, there is one described in Japanese Patent Application No. 9-237696.

(2) As shown in FIGS. 2 and 3, the invention described in Japanese Patent Application No. 9-237696 discloses a cam K capable of rotating and closing a tube 7 in conjunction with a rotation operation of a shaft.
A housing having tube through holes H and I on three sides and capable of holding the cam K, and a force component for inserting the tube 7 and fixed in the housing to close the tube 7 of the cam K And a member S (hereinafter, referred to as a “transmission member”) that transmits the fluid to the tube 7. The cam K has three notch structures a shown in FIG. 5 on a substantially hollow cylindrical side surface. The three notch structures a are common to the parts g, c, d,
e, and by sequentially rotating the operating handle A attached to the rotating shaft to a predetermined position displayed on the upper part of the housing, the three notched structures a are described in Table 1. The clamps C1 and C
2 and C3, it is possible to perform a plurality of clamping operations for each position at a time.

[0006]

However, in the above-described apparatus, the tube 7 is closed by positioning the portion d of the cam K on the transmission member S through which the tube 7 is inserted. The rotation operation of the rotating shaft when the part d is reached from the part g to the part e via the part e is very stiff when using a tube having the same diameter as the conventional one, and there is a problem that the operability is poor. In addition, since the above-described device is configured such that the Y-shaped tube 4 having three tubes connected thereto and the three transmission members S are housed in the housing, the entire device is undesirably large.

An object of the present invention is to provide a medical fluid flow path switching device which can perform the rotation operation of the cam well and is smaller.

[0008]

SUMMARY OF THE INVENTION The present invention provides a rotatable shaft, a cam that rotates in conjunction with the rotation of the shaft, and a port capable of holding the cam and having a liquid feed tube connected to one end. A housing having a portion, a sheet-like member provided in proximity to the other end opening of the port portion, and pressure contact means for pressing the sheet-like member against the other end opening of the port portion in conjunction with rotation of the cam. A medical fluid channel switching device characterized by the following.

[0009]

FIG. 4 is an exploded perspective view of an example of the medical fluid flow path switching device according to the present invention. However, the medical fluid channel switching device of the present invention is not limited to these drawings.

In the medical fluid flow switching device shown in FIG.
A cam K is pivotally mounted to form a shaft F having an operating handle A, a housing having an insertion hole G and a port insertion hole H of the shaft F, and being fitted with a lower housing portion E to accommodate the cam K. A circular housing upper portion D, a circular housing lower portion E having a port portion B at a position corresponding to the port insertion hole H of the housing upper portion D, and the housing upper portion D
And a sheet-like member I provided in proximity to the other end opening b of the port portion B in the housing composed of the housing portion E and the lower portion of the housing portion E, and the sheet-like member I Pressing means L which presses against the other end opening b, rotates in conjunction with the handle operation of the handle A by the operator, and opens the sheet-like member I through the pressing means L at the selected position through the other end opening of the port portion. b, and has a cam K capable of opening and closing a fluid flow path while being pressed against and separated from the fluid passage b.

The medical fluid flow switching device of the present invention is, for example, as shown in FIG. 10, a first tube 1, a second tube 2, and a third tube of a CAPD (continuous peritoneal dialysis device) system shown in FIG. Connect each of the tubes 3 to the port portions B1, B
2, used by connecting to B3. The medical fluid flow switching device of the present invention is a CAPD (continuous peritoneal dialysis device)
Switching of the fluid flow path at the other end opening b of each port portion when used in the system is operated according to the positions shown in Table 2 below. 6 and 7 show the open / closed state of each flow path when each position shown in Table 2 below is selected by the medical fluid flow path switching device of the present invention. In this figure, if the other end openings b1, b2, b3 of the port portion are black circles, it means that the flow path is in a closed state, and white circles means that the flow path is in an open state.

[0012]

[Table 2] Hereinafter, each position in Table 2 will be described with reference to FIGS.

[Position 1 (Initial State)] FIG.
As shown in (1), the other end openings b1, b2 of the port portion,
Each of b3 is separated from the sheet-like member, and the fluid flow path is in an open state, but it is not necessarily required to be in this state, and is selected in consideration of a sterilization method, a material of the sheet-like member, and the like. It is.

[Position 2 (Drainage)] As shown in FIG. 6B, b1 and b3 are opened to secure a flow path between the abdominal cavity of the patient and the drainage bag.

[Position 3 (flushing)] FIG.
As shown in (3), b2 and b3 are opened, and a flow path between the dialysate bag and the drainage bag is secured. In this position, the fluid flow path R in the housing is flushed with fresh dialysate in the dialysate bag. [Position 4 (Injection)] As shown in FIG. 7 (4), b2 and b1 are opened to secure a flow path between the dialysate bag and the abdominal cavity of the patient.

[Position 5 (End)] As shown in FIG. 7 (5), b1, b2, and b3 are all closed, and the inflow and outflow of fluid from any port is prevented.

The following can also be performed within a range that does not depart from the gist of the medical fluid channel switching device of the present invention. All positions can be selected manually by rotating the axis manually,
All may be automatically controlled mechanically. Position 3 is automatically controlled mechanically by time setting,
At positions 2 and 4 where the liquid is exchanged with the patient, the operation can be performed manually because there are individual differences such as the discharge speed of the drainage and the like depending on the patient.

In the conventional method, in order to operate each position in Tables 1 and 2 above, all the clamps C1, C2, and C3 at each position are opened or closed to operate each flow path. Although it was necessary to perform the switching individually, in the present invention, it is possible to switch the respective flow paths by selecting the respective positions by the rotating shaft, and therefore, the operation of switching the fluid flow path of the patient is simplified. .

Hereinafter, the components of the fluid channel switching device of the medical system of the present invention will be specifically described.

(1) Housing As shown in FIG. 4, the housing is composed of an upper part D and a lower part E. The upper part D and the lower part E have a storage chamber in which the cam K, the sheet-like member I, and the pressing means L can be stored. In the upper part D, predetermined positions for switching the flow path are displayed on the handle through hole G and on the surface. In the lower part E, three port portions B1, B2, B3 are formed apart from each other, one end of each port portion is connected to a liquid feed tube (not shown), and the other end extends into the storage chamber. A circuit that opens upward (the other ends b1, b2, and b3 of the port portion) is formed. A port insertion hole H is formed in the upper portion D of the housing at a position corresponding to the three lower port portions. The shape of the housing is preferably a hollow cylindrical shape, and is preferably as compact as possible. Also, the other end opening b of the port portion
Reference numerals 1, b2, and b3 denote portions (hereinafter, referred to as "touching portions") Q1, Q2, and Q3 for pressing the sheet-like member I of the pressing means L described later against the other end openings b1, b2, and b3 of the port portion.
In a positional relationship facing each other. Inside the housing,
Fluid flows from the other end opening of the one port portion to the other end opening of the other port portion in a space formed by sealing the periphery of the sheet-like member I and the inner periphery of the housing lower portion E in a liquid-tight manner. The flow path R is formed.

In FIG. 4, the case where the cam K is housed in the housing is described. However, it is not always necessary to house the cam K in the housing. As shown in FIG. 11, the housing upper part D and the cam K are integrally formed. May be used. In short, the shape and structure of the housing are particularly limited as long as the housing has the function of holding the shaft F, the cam K fixed to the shaft F, the pressing means L, and the sheet-like member I. is not.

Also, the other end openings b1, b2 of each port portion,
In FIG. 4, b3 extends in the storage chamber and opens substantially vertically upward, but is not limited thereto. For example, b3 opens at one end of the port portion. Is also good. Further, it is not always necessary to extend into the storage chamber to form a circuit, and the opening at the other end of the port portion may be formed on the same plane as the inner wall of the housing. In short, the other end openings b1, b2, b3 of each port section
Is formed at any position in the housing if it has a positional relationship with a sheet-like member I to be described later and a positional relationship facing the press-contact portion Q pressed by the cam K. May be.

Materials for forming the housing include metals such as stainless steel, ceramics, and synthetic resin materials having heat resistance, such as polyacetal, polycarbonate, polypropylene, ABS resin, and polyethylene.

(2) Shaft The operator can select each position by rotating the shaft F or the handle A connected to the shaft F.

(3) Sheet-shaped member The sheet-shaped member I has the other end openings b1, b of the port portion.
2 and 3 are housed in the housing housing so as to cover them with a slight gap. Further, the sheet-like member I is liquid-tightly sealed with the housing such that a flow path R from the other end opening of the one port portion to the other end opening of the other port portion is formed in the housing. . The sheet-like member I is directly pressed and released by a pressure-contact portion Q of a pressure-contact means L described later, and is pressed and separated from the other end openings b1, b2, and b3 of the port portion. For example, the sheet-like member I has a disk shape as shown in FIG.
Is preferably sealed in a liquid-tight manner with the inner peripheral edge of the base. It may be a donut shape. The sheet-like member I
Is in pressure contact with the other end opening of the port, the other end opening of the port is closed, and the inflow and outflow of fluid are prevented. When the sheet-like member I and the other end opening of the port portion are separated from each other, the other end opening of the port portion is opened to allow inflow and outflow of fluid. By locating the cam at each of the positions, the other end openings b1, b2 of the respective port portions are formed.
Any one of the three openings b3 is closed to allow the inflow and outflow of fluid between the two port portions, and two or more openings at the other end of the port portion are closed to allow fluid inflow to any location. Exit is to be prevented. Examples of the sheet-like member I include a sheet made of a synthetic resin having flexibility such as polyethylene and polypropylene.

(4) Pressing Means The pressing means L is, for example, substantially disk-shaped as shown in FIG.
The vicinity of the position corresponding to the other end opening b1, b2, b3 of each of the port portions is cut off leaving a part thereof, and the part is bent downward and upward in a disk shape with the part as a fulcrum. Pressing part Q1 for directly pressing and releasing the member I
It has Q2 and Q3. However, the present invention is not necessarily limited to these, and is pressed and released by a cam described later to open the other end b1 of the port portion.
b2 and b3 have portions (pressing portions Q1, Q2, and Q3) for pressing and separating the sheet-like member I, and are flexible enough to easily follow pressing and releasing by a cam. It may have a form. In FIG. 4, it is separate from the housing but may be provided integrally. In addition, the pressing means L includes the pressing portions Q1, Q2, Q
3 is installed in the housing so that the positional relationship between the other end openings b1, b2, and b3 of the respective port portions does not cause a shift or the like accompanying the rotation operation of the shaft.

(5) Cam The cam K rotates by the shaft operation in conjunction with the shaft operation.
It has a structure capable of forming an opening / closing state of a predetermined flow path required at each of the positions via the press-contact means L. As the cam employed in the present invention, for example, a cam having a circular planar direction and a cut-out structure on a side surface as shown in FIG. Notch structure a shown in FIG.
Are a part g for securing the open state of the flow path, a part c for shifting the flow path from the closed state to the open state, a part d for maintaining the closed state of the flow path, and a part for shifting the flow path from the open state to the closed state. e.

The vertical distance h between the portion g for maintaining the open state of the flow path and the part d for maintaining the closed state of the flow path is determined by the position at which the pressure contact part Q opens the other end opening b of the port portion. It is almost the same as the trajectory moving from the position to the closing position. That is, if the thickness h of the sheet-like member I is not taken into account, the vertical interval h between the portion g and the portion d is the same as the press-contact portion Q,
The clearance f is substantially equal to the clearance f between the other end opening b of the port portion.

In FIG. 4, the cam K used in the present invention has a three-dimensional shape, but has a flat shape (plate shape), and has a plurality of the notch structures on the side surface of the flat cam. There may be.

The medical channel switching device of the present invention is a CAPD
(Continuous peritoneal dialysis device) It is useful as a fluid flow switching device at the Y-shaped tube connection part of the system, but is also useful as a medical device equipped with another fluid flow switching device. For example, an infusion set, one in which several types of drug solutions are mixed at the time of use to form a one-part formulation (mixed at the time of use) and administered (for example,
In nutritional infusions, a formulation containing amino acids and electrolytes,
In the case of glucose and bicarbonate-containing peritoneal dialysis solution, examples include a bicarbonate-containing solution and a glucose-containing solution), a blood circuit, a blood transfusion set, and a blood component separation system.

[0031]

An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 4 is an exploded perspective view of one embodiment of the medical fluid channel switching device of the present invention. FIG. 8 shows that the press-contact portion Q is released to the cam K, the sheet-like member I and the other end opening b of the port portion.
It is a figure which shows the state which was separated. FIG. 9 is a view showing a state in which the sheet-like member I is pressed against the other end opening b of the port portion by the press-contact portion Q pressed by the cam K.

As shown in FIG. 4, the medical flow switching device of the present invention includes, in order from the top, (1) a shaft K having a cam K, a shaft F having an operating handle A, and (2) the shaft F Insertion hole G
A circular housing upper portion D which has a housing H for receiving the cam K by being fitted with the housing lower portion E, and (3) interlocking with the handle operation of the handle A by the operator. To rotate the sheet-like member I at the selected position to open the other end b1, b2, b3 of the port.
(4) The sheet member I is directly pressed against the other end openings b1, b2, and 3b of the port portions by pressing and releasing a pressure contact portion Q to be pressed against the opening and closing and opening the fluid flow path. Pressing means L having a pressing portion Q to be separated, (5)
A sheet-like member I provided close to the other end openings b1, b2, 3b of the port portion and sealed in a liquid-tight manner at the periphery of the lower housing portion E; (6) corresponding to the port insertion hole H of the upper housing portion D; Port portions B1, B2, and B3, and the other ends of the port portions B1, B2, and B3 extend inside the housing and open substantially vertically upward. and a circular housing lower part E having b3.

The handle A is rotated by the operator to each position shown in Table 2, and the position is displayed on a circular plane on the upper portion D of the housing. Positions 1 to 4 are set clockwise at 90 ° intervals, and position 5 is set at a position 45 ° clockwise from position 4.

The cam K has a circular shape in the plane direction, and has three cutout structures a shown in FIG. FIGS. 6 and 7 show the open / closed state of the other end openings b1, b2, and b3 of the port portion when the operation handle A is at the positions 1 to 5, respectively.

The press-contact means L is substantially disk-shaped, and the vicinity of the position corresponding to the other end openings b1, b2, b3 of the respective port portions is cut off, leaving a part thereof, and the disk-shaped part is used as a fulcrum. It is adapted to bend downward and upward. Press-contact portions Q1, Q2, and Q3 are formed at the distal end away from the fulcrum. The pressing means L is provided on the lower housing portion E so that the positional relationship between the pressing portions Q1, Q2, Q3 and the other end openings b1, b2, b3 of the port portions is not impaired with the rotation of the cam. Fixed.

As shown in FIGS. 8 and 9, the side of the press-contact portion Q that presses against the sheet-like member I is hemispherical, and the side that is pressed by the cam is flat.

As shown in FIG. 8, the portion g of the cam K is located above the press-contact portion Q, the sheet-like member I is released from the press-contact portion Q, and the other end opening b of the sheet-like member I is separated from the port b. In this case, the flow path is in an open state, and the inflow and outflow of the fluid are allowed.

As shown in FIG. 9, when the portion d of the cam K is located on the pressing portion Q and the sheet-like member I is pressed against the other end opening b of the port portion by the pressing portion Q,
The flow path is in a closed state, and the flow of the fluid is prevented.

[0040]

The medical fluid channel switching device of the present invention has the following effects by the above-described configuration. The handle operation of the patient or the like becomes lighter and the operability is improved. Since the Y-shaped tube, the transmission member, and the like are not stored in the housing of the housing, the size of the apparatus can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a conventional CAPD (continuous peritoneal dialysis device) system.

FIG. 2 is an exploded perspective view of an example of a conventional medical fluid channel switching device.

FIG. 3 is a front sectional view of a conventional medical fluid flow switching device.

FIG. 4 is an exploded perspective view of an example of the medical fluid channel switching device of the present invention.

FIG. 5 is an example of a cutout structure of a cam used in the medical fluid flow switching device of the present invention.

FIG. 6 is a diagram showing each position selected by the medical fluid channel switching device of the present invention, the opening and closing state of the channel. (1) is position 1 (initial state), (2) is position 2 (drainage), (3) is position 3 (flushing).

FIG. 7 is a diagram showing each position selected by the medical fluid flow channel switching device of the present invention, the opening and closing of the flow channel. (4) is position 4 (injection), (5) is position 5 (end)

FIG. 8 is a diagram showing a state in which the press-contact portion Q is released by the cam K, and the other end opening of the sheet-like member I and the port portion are separated.

FIG. 9 is a diagram showing a state in which the sheet-like member I is pressed against the other end opening of the port portion by the press-contact portion Q pressed by the cam K;

FIG. 10 is a CAPD (peritoneal dialysis device) system equipped with the medical fluid flow switching device of the present invention.

FIG. 11 is a view showing another example of the medical fluid channel switching device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st tube 2 2nd tube 3 3rd tube 4 Y-shaped tube 5 dialysate bag 6 drainage bag 7 tube A handle B1, B2, B3 port part b1, b2, b3 The other end opening of a port part K Cam D Housing upper part E Housing lower part F Handle shaft G Handle shaft F shaft insertion hole H Port insertion hole I Sheet-shaped member L Press-contact means Q1, Q2, Q3 Press-contact portion S Transmission member R Flow path a Cam Notch structure g Portion that maintains the flow channel open state c Portion that transitions the flow channel from the closed state to the open state d Portion that maintains the flow channel in the closed state e Portion that transitions the flow channel from the open state to the closed state C1 , C2, C3 Clamp M Chemical bag Pt Patient N Drainage bag f Clearance h Vertical spacing

Claims (4)

[Claims] 1. A housing having a rotatable shaft, a cam that rotates in conjunction with a rotation operation of the shaft, a housing capable of holding the cam, and having a port portion connected to one end of a liquid feed tube, and a port. A medical fluid flow comprising: a sheet-like member provided in proximity to the other end opening of the port portion; and press-contact means for pressing the sheet-like member against the other end opening of the port portion in conjunction with rotation of the cam. Road switching device. 2. The medical fluid flow switching device according to claim 1, wherein the housing further has a through hole of a rotatable shaft, and a cam is housed in the housing. 3. A part where the cam keeps the flow path open (g), a part where the flow path shifts from a closed state to an open state (c), a part where the flow path keeps a closed state (d), And a cut-out structure (a) formed at a portion (e) where the flow path shifts from an open state to a closed state.
The medical fluid channel switching device according to any one of the above items. 4. A peritoneal dialysis device equipped with the medical fluid channel switching device according to claim 1, 2, or 3.