Connection port

Abstract

To realize a connection port that allows easy connection to a line-side connector.SOLUTION: A connection port 100 includes: a connection section 101 that is provided in a pressure measurement device and is connected to a line-side connector 201 of a pressure measurement line provided in an extracorporeal circulation circuit; and a coming-off prevention section 102 that prevents the coming-off of the line-side connector 201 connected to the connection section 101. The connection section 101 has a cylindrical portion formed with an engagement surface that airtightly engages with a tip side wall surface of the line-side connector 201. The coming-off prevention section 102 has a locking portion 124 that holds down an engaged section 202 being a wall surface that faces a base end side on an outer surface of the line-side connector 201.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a connection port, and more particularly to a connection port to which a pressure measurement line of an extracorporeal circulation device or the like is connected. [Background technology]

[0002] In extracorporeal circulation therapy such as dialysis, the pressure of the extracorporeal circulation circuit is monitored by a monitoring device. In general, a pressure measurement line is branched from a drip chamber or the like, and the pressure is measured by a pressure sensor provided in the monitoring device. A connection port connected to the pressure sensor is provided on the panel of the monitoring device, and a line side connector provided at the tip of the pressure measurement line is connected to the connection port. In some cases, the line side connector is integrated with a transducer protection filter (TP filter) that prevents blood from passing through.

[0003] In order to measure pressure accurately, it is necessary to keep the path from the pressure measurement line to the pressure sensor airtight, and airtightness between the line side connector and the connection port is important. It is also necessary to prevent the line side connector from unintentionally falling off the connection port. For this reason, the line side connector and the connection port are fitted together airtight by matching their faces, and a screw-on coupler is provided to prevent falling off (for example, see Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2011-041679 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, since the coupler is provided on the outside of the tubular parts of the line side connector and the connection part that fit together, the fitting part cannot be visually observed. For this reason, the user may push the line side connector too hard into the connection port. In many cases, the connection port on the device side is a male lure made of metal, and the line side connector is a female lure made of resin. For this reason, if the line side connector is pushed too hard, a crack may occur on the line side connector side, and the connection may not be airtight.

[0006] In addition, the line side connector is designed to be sufficiently screwed into the connection port by rotating it about 1 / 4 to 1 / 2. However, users tend to rotate the line side connector too much for fear of it falling off. Rotating the line side connector too much can cause problems such as cracks, just like when the line side connector is pushed in too hard.

[0007] In addition, when the line-side connector is rotated, the tube of the pressure measurement line may become twisted. When the tube becomes twisted, narrowing or blockage occurs, which causes a problem that normal pressure measurement cannot be performed.

[0008] An object of the present disclosure is to realize a connection port that can solve at least one of these problems that arise when connecting a line-side connector. [Means for solving the problem]

[0009] A first aspect of the connection port of the present disclosure is provided on a pressure measuring device and comprises a connection portion to which a line side connector of a pressure measurement line provided in an extracorporeal circulation circuit is connected, and a fall prevention portion that prevents the line side connector connected to the connection portion from falling off, the connection portion having a tubular portion formed with an engagement surface that airtightly engages with the tip side wall surface of the line side connector, and the fall prevention portion has a locking portion that holds an engaged portion, which is a wall surface facing the base end side on the outer surface of the line side connector.

[0010] In the first embodiment of the connection port, a drop-out prevention part is provided that has a locking part that holds the locked part, which is a wall surface facing the base end on the outer surface of the line side connector. Therefore, unlike ports that prevent drop-out using a screw-on coupler or the like, the tubular part to which the line side connector is connected is easy to see, and it is easy to visually confirm that the tip side wall surface of the line side connector is engaged with the engagement surface. Also, unlike the case of a screw-on coupler, it is possible to prevent damage caused by excessive rotation of the line side connector and twisting of the tube.

[0011] In a first aspect of the connection port, the connection part is relatively movable from a first position to a second position when connected to the line side connector, and the locking part can be engaged with the locked part at the second position. With this configuration, the line side connector can be grasped and connected to the connection part on the device side at the first position, and then the line side connector can be moved to the second position while still being grasped to engage with the drop-out prevention part. Operation is easy because it can be performed continuously with one hand until the line side connector is connected and the drop-out prevention part is in a functional state.

[0012] In the first aspect of the connection port, a return stopper is further provided to prevent the connection part connected to the line connector from moving from the second position to the first position. By adopting such a configuration, the reliability of the fall-off prevention part can be improved.

[0013] In the first embodiment of the connection port, the detent portion can be automatically activated when the connection portion to which the line side connector is connected moves from the first position to the second position, and can be released when the release button is pressed. With this configuration, the lock is automatically applied when the connection portion is moved to the second position, reducing operational errors. Also, it is possible to prevent the connection portion from unintentionally moving from the second position, which may cause the line side connector to fall off.

[0014] In a first aspect of the connection port, the tubular portion can be movable between a normal position and a pushed-in position that is pushed in further than the normal position, and the connection portion can have a biasing member that biases the tubular portion to the normal position. By setting the tubular portion to the pushed-in position, the locking portion and the locked portion can be prevented from interfering with each other during movement, so that movement between the first position and the second position can be performed smoothly. In addition, in the second position, the tubular portion is biased toward the normal position and the locked portion is engaged with the locking portion, making it more difficult for the line-side connector to unintentionally come off.

[0015] One aspect of the line side connector for pressure measurement of the present disclosure comprises a connection portion having a cylindrical portion, and a fall prevention portion that prevents the connector of a protective filter connected to the connection portion from falling off, the cylindrical portion having an engagement surface that liquid-tightly engages with a tip side wall surface of the connector of the protective filter, and the fall prevention portion fixes the base end side surface of a wall surface extending radially outwardly provided on the outer surface of the housing of the protective filter.

[0016] According to one aspect of the line-side connector for pressure measurement, the fall-off prevention part fixes the base end side surface of the wall surface extending radially outward on the outer surface of the housing of the protective filter, so that unlike a connection part that prevents fall-off by a screw-fit coupler or the like, it is easy to visually confirm that the protective filter is connected. Also, unintended fall-off can be prevented.

[0017] A second aspect of the connection port of the extracorporeal circulation device is provided on the pressure measuring device and comprises a connection portion to which a line side connector of a pressure measurement line provided in the extracorporeal circulation circuit is connected, and a fall prevention portion that prevents the line side connector connected to the connection portion from falling off, and when connected to the line side connector, the connection portion is movable relative to the panel from a first position to a second position, and the fall prevention portion fixes the line side connector in the second position.

[0018] In a second embodiment of the connection port, the connection part is movable from a first position to a second position when connected to the line connector, and the fall-prevention part fixes the line connector in the second position. Therefore, unlike a port that uses a screw-fit coupler or the like to prevent fall-off, the tubular part to which the line connector is connected is easy to see, and it is easy to visually confirm that the distal end wall surface of the line connector is engaged with the engagement surface. Also, unlike the case of a screw-fit coupler, it is possible to prevent damage caused by excessive rotation of the line connector and twisting of the tube. Effect of the Invention

[0019] The connection port of the present disclosure can reduce problems that arise when connecting a line-side connector, while making it less likely for the connector to unintentionally come off. [Brief description of the drawings]

[0020] [Figure 1] 1 is a perspective view showing a state in which a line-side connector is connected to a connection port according to an embodiment; [Diagram 2] FIG. 2 is a perspective view of a connection port according to one embodiment with the line-side connector removed. [Diagram 3] FIG. 2 is a perspective view showing an example of a line side connector. [Figure 4] 13 is a perspective view showing a state in which a line-side connector is connected to a connection port according to a modified example. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] As shown in Figs. 1 and 2, a connection port 100 according to one embodiment is provided on a panel 150 of a dialysis monitoring device, and a line-side connector 201 of a pressure measurement line provided in an extracorporeal circulation circuit is connected to the connection port 100. In this embodiment, the line-side connector 201 can be a female connector integrated with a transducer protection filter (TP filter) as shown in Fig. 3. In the following, the panel 150 on which the connection port 100 is provided is described as being a front panel extending vertically downward of the dialysis monitoring device, but it can also be an inclined surface or a top surface extending horizontally. In addition, the line-side connector 201 will be described with the circuit side as the base end side and the device side as the tip end side.

[0022] The connection port 100 has a connection section 101 to which a line side connector 201 is connected, and a fall prevention section 102 that prevents the line side connector 201 connected to the connection section 101 from falling off.

[0023] The connection portion 101 has a tubular portion 111 that is inserted into and fitted with the line side connector 201. In this embodiment, the tubular portion 111 is a male connector, and the line side connector 201 is a female connector. The outer peripheral surface of the tubular portion 111 is an engagement surface that airtightly engages with an inner peripheral wall surface at the tip side of the line side connector 201. It is also possible to configure the tubular portion 111 as a female connector, and the line side connector 201 as a male connector. In this case, the inner peripheral surface of the tubular portion 111 is an engagement surface that airtightly engages with an outer peripheral surface at the tip side of the line side connector 201.

[0024] The connection port 100 does not have a coupler around the tubular portion 111, which is a male connector, that screws into the outer thread of the line side connector 201, which is a female connector. Therefore, the line side connector 201 can be pushed in while visually checking the tubular portion 111, so that the user can prevent the line side connector 201 from being pushed in too far. Note that a marker or the like indicating the maximum push-in position of the line side connector can be provided on the tubular portion 111 to encourage the user not to push the line side connector 201 in too far. Meanwhile, the provision of the fall-off prevention portion 102 can also make it difficult for the line side connector 201 to fall off unintentionally.

[0025] In this embodiment, the fall-off prevention part 102 has a locking part 124 formed by bending a thin plate protruding from the panel 150 into an inverted L-shape and extending approximately parallel to the panel 150. The locking part 124 is a fall-off prevention part that comes into contact with the locked part 202, which is a wall surface facing the base end side of the line side connector 201, and presses the line side connector 201 towards the connection part 101. This makes it possible to make it difficult for the line side connector 201 connected to the connection part 101 to fall off unintentionally.

[0026] In this embodiment, the surface on the base end side of the filter housing 204 of the line side connector 201 is the locked part 202. The filter housing 204 contains a liquid-impermeable filter formed of mesh, sponge, porous resin, sintered body, or the like. The filter allows gas to pass through but not liquid, so that it is possible to prevent liquid such as blood from flowing into the connection part while enabling pressure measurement. By using the surface on the base end side of the filter housing 204, which has a relatively large diameter, as the locked part 202, it is possible to easily engage with the locking part 124 and to create a stable engaged state. The line side connector 201 having the filter housing 204 may be fixed to the tube 210 of the pressure measurement line in an inseparable manner, or may be made removable.

[0027] In this embodiment, two fall-off prevention parts 102 are provided on both sides of the connection part 101. Therefore, multiple points of the filter housing 204 can be stably held down, making it more difficult for unintended fall-off to occur. In this embodiment, an example is shown in which two independent fall-off prevention parts 102 are provided to hold both sides of the port part 203 on the base end side, but the fall-off prevention part 102 can be one. Also, a configuration can be made having one columnar part standing from the panel 150 and two locking parts having a U-shape or the like. An example is shown in which the locking part 124 is a relatively long plate-like arm extending across the surface on the base end side of the filter housing 204, but it can also be a locking part that engages with the surface on the base end side of the filter housing 204. For example, the locking part can be formed into a semicircular housing shape and housed so as to cover a part of the filter housing 204, thereby restricting the relative movement of the filter housing 204 toward the base end side.

[0028] The line side connector 201 may be a connector that does not have the filter housing 204. In this case, a wall surface facing the base end side of a step or the like provided on the line side connector may be provided as a locked portion, and a locking portion may be provided that engages with this portion. Various shapes of the locking portion may be selected according to the shape of the locked portion.

[0029] In this embodiment, the connection portion 101 is formed in a slot 152 formed in the panel 150, and is configured to rotate between a first position shown by a solid line in Fig. 2 and a second position shown by a dashed line. In the first position, the connection portion 101 is inclined with respect to the panel 150, and its end portion is close to the panel 150 and separated from the locking portion 124. In the second position, the connection portion 101 is approximately perpendicular to the panel 150, and its end portion is separated from the panel 150 compared to the first position and is close to the locking portion 124.

[0030] When connection portion 101 is in the first position, line side connector 201 and tubular portion 111 can be fitted together without being hindered by locking portion 124. When connection portion 101 to which line side connector 201 is connected is rotated to the second position, locked portion 202 of line side connector 201 comes into contact with locking portion 124, preventing line side connector 201 from falling off connection portion 101.

[0031] When the connection part 101 is in the first position, the operator can fit the line side connector 201 while visually checking the tubular part 111 that is not hidden by the coupler. In addition, the action of moving the connection part 101 to the second position activates the fall-off prevention part 102, so that individual differences in the amount of force applied, as occurs when locking by screwing into a coupler, are unlikely to occur, and damage to the line side connector 201 due to excessive force can be suppressed. Furthermore, since there is no operation of twisting the line side connector 201, the tube 210 connected to the base end side of the line side connector 201 is unlikely to be twisted, and blockage of the tube 210 due to twisting can also be unlikely to occur.

[0032] In this embodiment, the locking portion 124 is an elastically deformable thin plate, and before the connection portion 101 moves completely to the second position, the locking portion 124 comes into contact with the line side connector 201, and the locking portion 124 is further pushed in while being elastically deformed to complete the movement to the second position. With this configuration, in the second position, the locking portion 124 biases the locked portion 202 toward the connection portion 101, making it even more difficult for the line side connector 201 to unintentionally come off. In this case, by making the end of the locking portion 124 slightly curved upward, the locking portion 124 can be smoothly pushed from the position where the locking portion 124 and the line side connector 201 first come into contact with each other to the second position. Note that the locking portion 124 may be configured to only come into contact with the locked portion 202 and not bias it toward the connection portion 101.

[0033] The connecting portion 101 may be configured to bias the locked portion 202 of the line side connector 201 connected to the tubular portion 111 toward the locking portion 124. The locked portion 202 is pressed against the locking portion 124, so that the locked portion 202 and the locking portion 124 are less likely to come out of engagement with each other. Various configurations may be adopted for the connecting portion 101 to bias the locked portion 202 toward the locking portion 124. For example, the tubular portion 111 may be made movable between a normal position and a pressed-in position where it is pressed closer to the panel 150 than the normal position, and a biasing member may be provided in the connecting portion 101 to bias the tubular portion 111 toward the normal position. The biasing member may be a coil spring or the like.

[0034] In this case, the connection part 101 can be moved from the first position to the second position with the cylindrical part 111 being a pressed-in position slightly pressed toward the panel 150. In this way, the locking part 124 and the locked part 202 do not come into contact with each other during the movement, or the locking part 124 hardly presses the locked part 202, so that the movement from the first position to the second position can be performed more smoothly. After the connection part 101 is moved to the second position, the cylindrical part 111 is released from the hand to release the pressure on the cylindrical part 111, so that the locked part 202 is pressed against the locking part 124, and thus it is possible to prevent the connection part 101 from falling off. When the connection part 101 is moved from the second position to the first position, the locking part 124 hardly interferes with the locked part 202 by pressing the cylindrical part 111, so that the line side connector 201 can be easily removed. Also, if the engagement between the locked portion 202 and the locking portion 124 is not released unless the device is in the pushed-in position, unintentional disengagement can be prevented even more.

[0035] A detent portion 153 can be provided to prevent the connection portion 101 from returning to the first position when the connection portion 101 is moved to the second position. In this embodiment, the detent portion 153 is a rod-shaped member that protrudes from the panel 150 and abuts against the outer edge of the filter housing 204 of the line-side connector 201. The detent portion 153 is housed in the panel 150 when the connection portion 101 is in the first position, and protrudes from the panel 150 when the connection portion is moved to the second position. By providing the detent portion 153, it is possible to prevent the connection portion 101 from unintentionally moving from the second position to the first position, which causes the line-side connector 201 to fall off.

[0036] In this embodiment, panel 150 is provided with operation button 155, and by operating operation button 155, detent portion 153 is housed within panel 150. This shortens the protruding length of detent portion 153 and releases engagement with locked portion 202, making it possible to move connection portion 101 from the second position to the first position. If detent portion 153 can be released from engagement with locked portion 202, it can also be configured so that only a portion of it is housed within panel 150.

[0037] The detent portion 153 is not limited to this configuration, and various configurations can be adopted that can releasably lock the connection portion 101 in the second position. In addition, various configurations can be adopted for the mechanism that releases the lock by the detent portion 153. As a method for releasing the engagement of the detent portion 153, for example, a configuration in which a pin that is the detent portion 153 is directly pushed in with a finger or the like can be used. In addition, the pin can be made movable by electrical control, so that, for example, the engagement between the pin and the locked portion 202 is automatically released when the treatment is completed.

[0038] If some kind of locking mechanism is activated when the connection part 101 is moved to the second position, the operator can recognize that the movement to the second position has been completed, making it difficult for the fall-off prevention part 102 to fail to function due to insufficient movement. This also provides the operator with a sense of security, and has the effect of preventing excessive movement operations. A mechanism can also be provided that gives a clicking sensation or notifies the operator by sound or light when the connection part 101 is moved to the second position.

[0039] When some mechanism for locking the connection part 101 in the second position is provided, the connection part 101 can be configured to automatically return from the second position to the first position. For example, a member such as a spring that biases the connection part 101 to the first position can be provided so that the connection part 101 does not stay in the intermediate position but goes to the first position when it is not locked in the second position. This allows the line side connector 201 to be connected immediately. Also, since the connection part 101 does not stay in the intermediate position, it is easy to visually check whether the anti-disconnection part is functioning, which has the effect of reducing operational errors.

[0040] In this embodiment, the connection part 101 is configured to rotate in the vertical direction with respect to the panel 150, but various configurations can be adopted that can change the relative positional relationship with the fall-off prevention part 102. For example, it can be configured to rotate left and right with respect to the panel 150, or it can be configured to slide in parallel instead of rotating.

[0041] Although the configuration has been shown in which the position of the connection part 101 moves to cause the line side connector 201 to engage with the fall-off prevention part 102, it is also possible to configure the connection part 101 to be fixed and the fall-off prevention part 102 to move. For example, it is also possible to configure the fall-off prevention part 102 to rotate or slide to a position where the locking part and the locked part engage. It is also possible to configure the fall-off prevention part 102 not to move as a whole, but rather to have only the locking part move or deform to engage the locking part and the locked part.

[0042] In the modified example 100A shown in FIG. 4, when the line side connector 201 is connected to the connection portion 101, a pin which is the fall-off prevention portion 103 protrudes from the panel 150 and abuts against the engaging portion 202 which is the base end side surface of the filter housing 204 of the line side connector 201.

[0043] In FIG. 4, the first portion 150a on which the connection portion 101 of the panel 150 is provided and the second portion 150b on which the fall-off prevention portion 103 is provided are surfaces that are approximately perpendicular to each other. Therefore, the fall-off prevention portion 103 can be a simple pin that protrudes vertically from the panel 150, and the structure can be simplified. In addition, the first portion 150a on which the connection portion 101 of the panel 150 is provided is an inclined surface rather than a surface that extends vertically downward. In this way, the connection port 100A is disposed in a slightly recessed portion of the panel 150, and it is possible to prevent the line side connector 201 from being hit by a hand or an object during use. In addition, when fitting the line side connector 201 to the connection portion 101, the operator pushes the line side connector 201 diagonally upward while visually checking the connection portion 101, and therefore it is easy to align the line side connector 201 and apply an appropriate force. In addition, since the line side connector 201 can be removed by pulling it diagonally downward, the removal operation is also easy. The inclination angle of the first portion 150a on which the connection portion 101 is provided is preferably about 30° to 60° with respect to the vertical plane. However, the connection portion 101 can also be provided on a vertical or horizontal plane.

[0044] It is preferable that the pin serving as the fall-off prevention portion 103 be configured to automatically protrude when the line side connector 201 is connected to the connection portion 101. For example, a sensor may be provided in the connection portion 101 so that the pin protrudes when it detects pressure, or a switch mechanism may be provided separately from the connection portion 101 so that, for example, the filter housing 204 of the line side connector 201 presses the switch mechanism to activate the fall-off prevention portion 103.

[0045] In the modification shown in Fig. 4, by pressing operation button 156 provided on panel 150, the pin serving as fall-off prevention part 103 is accommodated in panel 150, shortening its protruding length, and disengagement with locked part 202 is released. With this configuration, line side connector 201 can also be easily removed. Various methods can be selected to release the engagement of fall-off prevention part 103, and for example, a configuration in which the pin is directly pushed in by a finger or the like can be used. Alternatively, the pin does not move relative to the line side connector 201, and by sliding 204, fall-off prevention part 103 and line side connector 201 can be separated, allowing line side connector 201 to be removed from the connection part.

[0046] 4 shows an example in which there is one pin serving as the fall-off prevention portion 103, but multiple pins may be provided. By having the multiple pins come into contact with multiple locked portions of the line side connector 201, it is possible to more stably prevent the occurrence of unintended fall-off. Furthermore, the fall-off prevention portion 103 is not limited to a portion that simply protrudes from the panel 150, and it may also be configured to prevent separation of the line side connector 201 and the connection portion by, for example, rotating, sliding, deforming, or the like.

[0047] In the present embodiment and the modified example, the fall-off prevention part is a mechanism for preventing the line side connector from falling off by pressing the surface facing the base end of the filter housing, the step, etc., of the line side connector, but is not limited to such a configuration, and various configurations for preventing the line side connector from accidentally falling off can be adopted as the fall-off prevention part. For example, a flange can be provided on the outer surface of the connection part, and the mechanism for preventing the fall-off can be implemented by pressing the surface facing the base end of the flange.

[0048] In this embodiment and the modified example, a connection port provided on the panel surface of a dialysis monitoring device or the like has been described, but the connector may also be provided on a portion of the device other than the panel surface. [Industrial Applicability]

[0049] INDUSTRIAL APPLICABILITY The connection port of the present disclosure can solve at least one of the problems that arise when connecting a line-side connector, and is useful in the field of medical devices that perform pressure measurement. [Explanation of symbols]

[0050] 100 Connection Ports 100A connection port 101 Connection 102 Falling prevention part 103 Falling prevention part 111 Cylindrical part 124 Locking part 150 Panels 150a First Part 150b Second Part 153 Detent part 155 Operation Button 156 Operation Button 201 Line side connector 202 Locked part 203 Port section 204 Filter housing 210 Tube

Claims

1. a connection portion provided in the pressure measuring device and to which a line side connector of a pressure measuring line provided in the extracorporeal circulation circuit is connected; a fall-off prevention portion that prevents the line-side connector connected to the connection portion from falling off, the connecting portion has a tubular portion having an engagement surface that is adapted to airtightly engage with a tip end wall surface of the line side connector, The anti-fall-out portion has a locking portion that presses a locked portion, which is a wall surface facing the base end side on the outer surface of the line side connector.

2. The connection port according to claim 1, wherein the connection portion is capable of moving relatively from a first position to a second position when connected to the line side connector, and the locking portion is engaged with the locked portion when in the second position.

3. The connection port of claim 2 , further comprising a detent portion that prevents a connection portion to which the line side connector is connected from moving from the second position to the first position.

4. The connection port according to claim 3 , wherein the detent portion is automatically activated when the connection portion to which the line side connector is connected moves from the first position to the second position, and is released when a release button is pressed.

5. the cylindrical portion is movable between a normal position and a pushed-in position that is pushed in further than the normal position, The connection port according to claim 2 , wherein the connection portion has a biasing member that biases the cylindrical portion to the normal position.

6. The protective filter is connected to the connecting portion and has a cylindrical portion. The protective filter is connected to the connecting portion and has a fall-prevention portion that prevents the protective filter from falling off. the cylindrical portion has an engagement surface that airtightly engages with a tip side wall surface of the connector of the protection filter, The fall-off prevention portion is a connector for measuring pressure that fixes a base end side surface of a wall surface extending radially outwardly on the outer surface of the housing of the protective filter.

7. a connection portion provided in the pressure measuring device and to which a line side connector of a pressure measuring line provided in the extracorporeal circulation circuit is connected; a fall-off prevention portion that prevents the line-side connector connected to the connection portion from falling off, A connection port, wherein the connection portion is relatively movable from a first position to a second position when connected to the line side connector, and the fall-out prevention portion fixes the line side connector in the second position.

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