JP2013202268A - Connection structure of medical apparatus and extracorporeal circulation treatment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connection structure capable of improving the flexibility of freedom of adjusting the positional relationship and attitude of a sub device supported by a medical main device, and sufficiently securing support force to the sub device.SOLUTION: A connection structure includes: coupling parts 8 and 15 with a cylinder circumferential surface respectively provided on a medical main device 1 and a sub device 2; and a connection member 3 having, at both ends, first and second fitting parts 9 and 10 to be respectively fitted to the cylinder circumferential surfaces of the coupling parts. The connection member is configured so as to be turnable to the main device and the sub device through the fitting of the first and second fitting parts, and to displaceably support the sub device by the main device through the connection member. The coupling part of the sub device is constituted of an inner side fitting part 18, and the second fitting part is constituted of an outer side fitting part 10 fitted to the outer side of the inner side fitting part.

Description

  The present invention relates to a connection structure for supporting a sub apparatus by a medical main apparatus, for example, a connection structure for supporting an artificial lung by a blood reservoir using a blood reservoir as a main apparatus and an artificial lung as a sub apparatus.

  In cardiac surgery, a heart-lung machine is used to stop the patient's heart and perform the respiratory and circulatory functions during that time. Artificial lungs provide extracorporeal blood circulation by supplying oxygen to the blood on behalf of the patient's lungs and discharging carbon dioxide. Further, in extracorporeal blood circulation, the blood pump is operated to remove blood from the patient's vein, and after exchanging gas between the oxygen-containing gas and the blood by an artificial lung, the operation of returning to the patient's artery is performed. Therefore, a blood circuit for performing extracorporeal blood circulation needs to have a buffer function for adjusting the blood volume in the circuit and keeping the blood return constant together with the artificial lung. Furthermore, a line is also provided for returning blood after aspirating blood from the operative field and separating and removing foreign matter. Therefore, a blood reservoir is used for temporarily storing the blood that has been removed from blood and for temporarily storing blood that has been aspirated from the operative field.

  Thus, in a blood circuit for extracorporeal blood circulation, a blood reservoir is generally used together with an artificial lung. In the following description, an apparatus including an artificial lung and a blood reservoir used in an extracorporeal blood circulation circuit is referred to as an extracorporeal circulation processing apparatus. In addition, the artificial lung is generally configured such that a gas exchanging part for exchanging gas is integrated with a heat exchanger for adjusting the temperature of blood, but the heat exchanger is integrated. That is not essential. The following description is also applied in common to the case of an artificial lung having only a gas exchange unit without a heat exchanger.

  As for the extracorporeal circulation processing apparatus, it is desirable to shorten the distance between the artificial lung and the blood reservoir in order to reduce the arrangement space of each device and to reduce the blood filling amount in the blood circuit formed by the tube. In addition, in consideration of the ease of assembling the extracorporeal blood circulation circuit, the blood reservoir and the artificial lung are generally supplied in a connected and integrated state. As a form of integration, a structure in which an artificial lung is connected to the bottom of the blood reservoir is usually adopted.

  By the way, in the blood reservoir, since it is necessary to constantly monitor the amount of blood stored, a visual confirmation part is provided on the front side that protrudes downward around the blood outlet on the bottom surface to reduce the cross-sectional area, making it easy to visually recognize changes in the blood storage amount. Structure is used. In such a blood reservoir, the oxygenator coupled below the bottom surface is disposed on the back side of the blood reservoir. When using the extracorporeal circulation processing apparatus of this configuration during the operation, it is assumed that the blood storage chamber is installed facing the operator so that the operator can easily see the blood storage volume in the blood reservoir. It is necessary to adjust the lung arrangement and posture appropriately.

  However, it has been difficult to set the oxygenator and the blood reservoir at the same time in the conventional blood reservoir in which the artificial lung is integrated. For this reason, Patent Literature 1 discloses an oxygenator-integrated blood reservoir capable of setting the orientation of the blood reservoir and the placement of the oxygenator in desired directions, respectively. In patent document 1, the joint part for mutually joining is provided in the bottom face of the blood reservoir and the upper part of the oxygenator, and the oxygenator and the blood reservoir are relatively rotatable by the joint. .

  As a result, the oxygenator is rotatably connected to the bottom of the blood reservoir on the back side of the blood reservoir, and the blood reservoir is oriented in a direction that is easily visible to the operator. In addition, the orientation of the artificial lung can be adjusted as appropriate in consideration of the piping efficiency of a tube for connecting to a blood pump or the like. Thus, it is possible to appropriately adjust the orientation of the artificial lung in a state where the blood reservoir is directed to the operator.

JP-A-5-345019

  In the configuration disclosed in Patent Document 1, the orientation of the blood reservoir and the orientation of the artificial lung can be set to a desired orientation, but the artificial lung is only rotated around the connecting portion with the blood reservoir. The range of motion is narrow and the degree of freedom in layout is low. That is, only the orientation of the oxygenator is variable by rotation about the connecting portion with the blood reservoir, and the position of the oxygenator with respect to the blood reservoir cannot be adjusted.

  Further, in the connection structure in which the oxygenator is supported by the blood reservoir via the connection member, it is difficult to obtain a sufficient support force at the connecting portion between the connection member and the oxygenator. This is because, since the size of the oxygenator is generally small, the joint portion with the connecting member must be small, and the area of the engaging portion that generates support force with the connecting member is small. is there.

  The above problems are not limited to the combination of an oxygenator and a blood reservoir, but there are other examples of combinations of devices that are used in conjunction with a secondary device that is displaceably supported by the main device. There is a problem similar to the above with regard to the connecting structure of the apparatus.

  Therefore, the present invention has a high degree of freedom in adjusting the positional relationship and posture of the secondary device supported by the medical main device, and can sufficiently secure the supporting force for the secondary device. The purpose is to provide.

  Another object of the present invention is to provide an extracorporeal circulation processing apparatus using such a connection structure.

  In order to solve the above-described problems, a medical device connection structure according to the present invention includes a coupling portion having a cylindrical peripheral surface provided in each of a medical main device and a sub device, and the coupling of the main device and the sub device. A connecting member having a first fitting portion and a second fitting portion that are fitted to both ends of the cylindrical peripheral surface of each portion, and the connecting member is configured to fit the first fitting portion and the second fitting portion. The sub-device is rotatable with respect to the main device and the sub-device, and is configured to support the sub-device so as to be displaceable with respect to the main device via the connecting member. The part is constituted by an inner fitting part, and the second fitting part is constituted by an outer fitting part fitted outside the inner fitting part.

  According to the connection structure of the medical device of the present invention, by adjusting the auxiliary device via the rotation adjustment at the first fitting portion and the second fitting portion of the connecting member with respect to the medical main device. The degree of freedom in adjusting the positional relationship and posture of the sub device with respect to the main device is high. And since the 2nd fitting part of a connection member fits the outer side of the coupling | bond part of a subdevice, the diameter of a fitting peripheral surface can be taken large and the supporting force of the connection member with respect to a subdevice can be enlarged. Can do.

The side view of the extracorporeal circulation processing apparatus in embodiment of this invention The perspective view which shows the state which combined the oxygenator which is an element of an extracorporeal circulation processing apparatus, and a connection member. The perspective view which removes a connection member from the state of FIG. 2, and shows only an artificial lung The perspective view which shows the state which decomposed | disassembled the oxygenator into the oxygenator main body and the protective cover The side view which shows the 1st frame which comprises the protective cover and is mounted | worn with the front side of an oxygenator main body Sectional drawing along the AA in FIG. 5 of the 1st frame. The perspective view of the connection member which is one element of an extracorporeal circulation processing apparatus Right side view of the connecting member Bottom view of the connecting member Sectional drawing along the BB line in FIG. 8 of the connection member Sectional drawing which shows the structure of the connection area | region of the 2nd fitting part of the connection member shown in FIG. 10, and the connection part of the oxygenator shown in FIG.

  The connection structure of the medical device of the present invention can take the following aspects based on the above configuration.

  That is, the coupling portion of the auxiliary device has a double cylindrical structure in which a gap is formed inside the inner fitting portion and a small-diameter inner cylinder portion is provided, and the second fitting portion of the connecting member Has a double cylindrical structure in which a gap is formed inside the outer fitting portion and a large-diameter inner cylinder portion is provided, and the large-diameter inner cylinder portion includes the inner fitting portion and the small-diameter inner cylinder. It can be set as the structure which can enter into the clearance gap between parts and can be fitted to the outer peripheral surface of the said small diameter inner cylinder part. The double fitting of such a double cylindrical structure can further improve the supporting force of the auxiliary device by the connecting member.

  In addition, in the state where the inner fitting portion and the outer fitting portion are fitted to the second fitting portion, the fitting of both fitting portions is released by engagement with the peripheral wall of the inner fitting portion. A locking lever for restricting separation is provided, and the locking lever extends in the central axis direction of the outer fitting portion, and is supported by the outer fitting portion at a support shaft portion located in the middle in the same direction. A locking claw is provided at the tip of the locking lever, and the locking claw is fitted in a locking recess provided in a peripheral wall of the inner fitting portion. The engagement has an effect of restricting the detachment of the fitting between the two fitting portions, and a release operation portion is provided at the rear end of the locking lever, and the release By pushing the operating portion radially inward of the outer fitting portion and rotating the locking lever around the support shaft portion, The fitting of the inner fitting portion relative to the outer fitting portion can be configured to be able to desorb. With such a structure of the locking lever, it is possible to increase the displacement amount of the locking claw due to the operation of the release operation portion, to increase the engagement area with the locking recess, and to prevent the fitting from being detached. A sufficient effect can be secured. Thereby, it is possible to more reliably support the auxiliary device by the connecting member.

  In addition, the connecting member is arranged such that the central axis of rotation of the first fitting portion and the central axis of rotation of the second fitting portion are parallel to each other and spaced from each other. It can be configured. Thereby, the range of the position adjustment of the sub apparatus can be made sufficiently large.

  In this case, the connecting member includes a laterally extending portion that extends laterally from the first fitting portion, and a longitudinally extending portion that extends upward from the second fitting portion and is coupled to the laterally extending portion. It can be set as the structure provided with the bending structure part formed in the site | part which the existing part and the said horizontal direction extension part, and the said vertical direction extension part couple | bonded.

  The extracorporeal circulation processing apparatus of the present invention can be configured as follows using the connection structure having the above configuration. In other words, a part of the main body part that deviates from the center of the bottom surface has a blood storage chamber protruding downward, a blood outflow port is provided at the lower end of the blood storage room, and a blood inflow port is provided at the upper part of the main body part The medical device according to any one of the above, comprising a blood reservoir, a blood flow channel for performing gas exchange by intersecting the gas flow channel and blood, and an oxygenator connected to the blood reservoir The combination of the blood reservoirs, wherein the blood reservoir is supported by the blood reservoir and the artificial lung is supported by the blood reservoir and is coupled to the first fitting portion of the connecting member, with the blood reservoir as the main device and the auxiliary device as the auxiliary device. A portion projecting downward at a position separated from the blood reservoir on the bottom surface of the main body, and the coupling portion of the artificial lung coupled to the second fitting portion is disposed on an upper portion of the artificial lung. The central axis of rotation of the first and second fitting parts is It is possible to configure the extracorporeal circulation apparatus which extends in the vertical direction of the blood reservoir.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiment, a connection structure for connecting a blood reservoir and an artificial lung is disclosed using an extracorporeal circulation processing apparatus as an example. However, this connection structure is not limited to the application to a combination of a blood reservoir and an artificial lung, and various medical main devices and sub devices that require a degree of freedom in adjusting the positional relationship and posture. Applicable to concatenation.

<Embodiment>
FIG. 1 is a perspective view showing an extracorporeal circulation processing apparatus according to an embodiment of the present invention. This extracorporeal circulation processing apparatus is used by being incorporated in an extracorporeal blood circulation circuit, and is configured by connecting a blood reservoir 1 and an artificial lung 2 by a connecting member 3. FIG. 2 is a perspective view of the structure in which the oxygenator 2 and the connecting member 3 are coupled to each other in a state where the oxygenator 2 is not connected to the blood reservoir 1. Further, FIG. 3 is a perspective view showing the structure of only the artificial lung 2 from which the connecting member 3 is removed from the state of FIG.

  The blood reservoir 1 includes a main body portion 4 and a lid body 5 placed on the upper portion of the main body portion 4. The main body 4 has a blood storage chamber 6 that is formed so that a part of the bottom of the bottom surface protrudes downward. A blood outflow port 7 through which blood flows out is provided at the lower end of the blood storage chamber 6. . A cylindrical coupling portion 8 is provided at a position separated from the blood storage chamber 6 on the bottom surface of the main body portion 4 so as to protrude downward. The coupling portion 8 is fitted with a first fitting portion 9 provided on one end side of the connecting member 3. A second fitting portion 10 is provided on the other end side of the connecting member 3 and is fitted with a connecting portion 15 provided on the artificial lung 2. Thereby, the blood reservoir 1 and the artificial lung 2 are connected by the connecting member 3.

  As shown in FIG. 2, the first fitting portion 9 of the connecting member 3 has a cylindrical inner peripheral surface 11. The coupling portion 8 of the blood reservoir 1 shown in FIG. 1 is provided with a region for forming a cylindrical outer peripheral surface 8a, and the cylindrical inner peripheral surface 11 is fitted in this region. Through this fitting, the connecting member 3 is rotatably supported with respect to the blood reservoir 1. Although illustration of this fitting structure is omitted, for example, the coupling portion 8 is provided with a mechanism for holding the fitting between the cylindrical outer peripheral surface 8 a and the cylindrical inner peripheral surface 11.

  The coupling portion 8 of the blood reservoir 1 further has a portion that is coupled to a holder 12 that constitutes a part of a support device for supporting the blood reservoir 1, thereby supporting the blood reservoir 1 in a desired state. be able to. Although not shown, the lid 5 is used for mixing a plurality of intracardiac blood inflow ports into which intracardiac blood flows, a venous blood inflow port into which venous blood flows, and a liquid medicine into the lid 5. A plurality of drug solution injection ports, an exhaust port for adjusting the pressure in the blood reservoir 1, and the like are provided.

  In the blood reservoir 1, a venous blood filtration network that filters blood flowing from the venous blood flow inlet port is held in the tank, and bubbles are removed from the blood flowing from the intracardiac blood flow inlet port, as in a known configuration. Therefore, the cardiotomy section can be arranged.

  The structure of the oxygenator 2 is shown in FIGS. 4 to 6 in addition to FIGS. As shown in FIG. 2 and the like, the oxygenator 2 has a structure in which a protective cover 14 is attached to the outside of the housing of the oxygenator body 13. This structure can be clearly understood from FIG. 4 showing a state in which the oxygenator 2 is disassembled into an oxygenator body 13 and a protective cover 14. In FIG. 4, the protective cover 14 is a structure obtained by combining the first frame body 14 a attached to the front surface side of the oxygenator body 13 and the second frame body 14 b attached to the rear surface side.

  As shown in FIG. 3 etc., the coupling | bond part 15 couple | bonded with the connection member 3 is provided in the upper part of the 1st frame 14a. The connecting member 3 and the artificial lung 2 can be rotated relative to each other through fitting at the coupling portion 15. A side view of the first frame 14a is shown in FIG. The first frame 14a is provided with an engaging claw 16 and engages with an engaging hole 17 (see FIG. 4) provided in the second frame 14b when attached to the oxygenator body 13. Integrate.

  The structure of the coupling portion 15 is shown in FIG. FIG. 6 is a cross-sectional view taken along the line AA in FIG. 5 and shows a part of the first frame body 14 a including the coupling portion 15. The coupling part 15 is basically constituted by a cylindrical inner fitting part 18, and the main coupling is formed by fitting the second fitting part 10 of the connecting member 3 outside this part. . A locking recess 19 is provided on the outer peripheral surface of the inner fitting portion 18. The coupling portion 15 is further provided with a small-diameter inner cylinder portion 21 with a gap 20 inside the inner fitting portion 18 to form a double cylindrical structure.

  The oxygenator main body 13 has a heat exchanging portion 22 and a gas exchanging portion 23 (see FIGS. 1 and 4), and elements having known configurations for heat exchanging and gas exchanging are accommodated in the housing, respectively. . A blood flow path that penetrates the heat exchange section 22 and the gas exchange section 23 in the horizontal direction is formed, and blood is introduced into and out of the outer shell wall of the artificial lung body 13 corresponding to both ends of the blood flow path. Blood ports 24 and 25 are provided. Cold and hot water ports 26 and 27 (see FIG. 2) for allowing cold water or hot water, which is a heat exchange liquid, to flow in and out are provided at the left and right ends of the heat exchange unit 22, respectively. Gas ports 28 and 29 for introducing and deriving oxygen-containing gas are provided at the upper and lower ends of the gas exchange unit 23, respectively.

  Although illustration is omitted, a stainless pipe bundle for heat exchange is arranged in the inner cavity of the heat exchange section 22. A hollow fiber bundle that is a bundle of hollow fiber membranes is disposed in the lumen of the gas exchange unit 23. Both ends of the stainless steel pipe bundle and the hollow fiber bundle are exposed and filled with a seal member, and the lumen of the stainless steel pipe bundle and the hollow fiber bundle extends in a horizontal direction across the stainless pipe bundle and the hollow fiber bundle. A flow path is formed.

  Cold water or hot water that is a heat exchange liquid flowing in from the cold / hot water port 26 enters from one end of each stainless steel pipe, and flows out from the cold / hot water port 27 via the other end of each stainless steel pipe. Meanwhile, heat exchange is performed with blood flowing through the blood flow path. On the other hand, the oxygen-containing gas flowing in from the gas port 28 enters from one end of each hollow fiber membrane, and flows out from the gas port 29 via the other end of each hollow fiber membrane. In the meantime, gas exchange is performed with blood flowing through the blood flow path.

  The configuration of the oxygenator 2 is an example, and the connection structure with the blood reservoir of the present embodiment can be applied even if the configuration is other than that. The oxygenator 2 is not limited to the heat exchange unit 22 and the gas exchange unit 23, and the connection structure of the present embodiment can be applied even if the oxygenator 2 is configured only with the gas exchange unit 23.

  The structure of the connecting member 3 is shown in FIGS. 7 is a perspective view of the connecting member 3, FIG. 8 is a right side view, and FIG. 9 is a bottom view. As described above, the connecting member 3 has the first fitting portion 9 and the second fitting portion 10 and has a structure in which both fitting portions are integrally coupled. The first fitting portion 9 is fitted with the coupling portion 8 of the blood reservoir 1, and the second fitting portion 10 is fitted with the coupling portion 15 of the artificial lung 2. The connecting member 3 can be made of polycarbonate, for example.

  The connecting member 3 has a structure in which the first and second fitting portions 9 and 10 are integrated, and a laterally extending portion 30 extending in the lateral direction from the first fitting portion 9 and the second fitting portion 10. A longitudinally extending portion 31 extending upward and coupled to the laterally extending portion 30; With this structure, the central axis of rotation of the first fitting portion 9 and the central axis of rotation of the second fitting portion 10 are parallel to each other and are arranged with a space therebetween. ing.

  An outer corner portion of the bent structure portion formed at a portion where the laterally extending portion 30 and the longitudinally extending portion 31 are joined forms an inclined surface 32. Thereby, it is a structure which is easy to avoid interference with the side surface of the blood storage chamber 6 when rotating the connection member 3 with respect to the blood reservoir 1. A locking lever 33 is provided on the side of the longitudinally extending portion 31 above the second fitting portion 10 to constitute a locking operation portion.

  The locking lever 33 is engaged with the peripheral wall of the inner fitting portion 18 in a state where the second fitting portion 10 is fitted with the coupling portion 15 of the oxygenator 2, so that the fitting of both the fitting portions is released. It is configured to regulate. The locking lever 33 extends in the central axis direction of the second fitting portion 10, and is supported by the second fitting portion 10 on the support shaft portion 34 (FIG. 8) located in the middle in the same direction. It can be rotated around the portion 34. A locking claw 35 is provided at the tip of the locking lever 33, and the engagement between the second fitting portion 10 and the coupling portion 15 is achieved by engaging with the locking recess 19 of the inner fitting portion 18 in the coupling portion 15. Desorption is suppressed.

  A release operation part 36 is provided at the rear end of the locking lever 33. The release lever 36 can be pressed toward the inside of the second fitting portion 10 to rotate the locking lever 33 around the support shaft portion 34. As a result, the engagement of the locking claw 35 with respect to the locking recess 19 is released, and the fitting between the second fitting portion 10 and the coupling portion 15 can be released.

  The cross-sectional structure of the second fitting portion 10 will be further described with reference to FIGS. 10 is a cross-sectional view of the connecting member 3 taken along line BB in FIG. The second fitting portion 10 is basically constituted by an outer fitting portion 37, and this portion is fitted to the outside of the inner fitting portion 18 of the coupling portion 15 of the oxygenator 2, thereby allowing main coupling. It is formed. The second fitting portion 10 is further provided with a large-diameter inner cylindrical portion 39 with a gap 38 formed inside the outer fitting portion 37 to form a double cylindrical structure. The large-diameter inner cylinder part 39 can enter the gap 20 between the inner fitting part 18 and the small-diameter inner cylinder part 21 in the coupling part 15 of the oxygenator 2 and can be fitted to the outer peripheral surface of the small-diameter inner cylinder part 21. is there. Thereby, auxiliary fitting is formed.

  FIG. 11 shows the structure of the coupling region of the second fitting part 37 of the connecting member 3 shown in FIG. 10 and the coupling part 15 of the oxygenator 2 shown in FIG. The inner peripheral surface of the outer fitting portion 37 of the connecting member 3 and the outer peripheral surface of the inner fitting portion 18 of the coupling portion 15 are fitted. Furthermore, the inner peripheral surface of the large-diameter inner cylindrical portion 39 of the connecting member 3 and the outer peripheral surface of the small-diameter inner cylindrical portion 21 of the coupling portion 15 are fitted. The locking claw 35 at the tip of the locking lever 33 is engaged with the locking recess 19 of the inner fitting portion 18 of the coupling portion 15.

  Thus, by providing the inner fitting portion 18 in the coupling portion 15 of the oxygenator 2 and adopting a structure in which the outer fitting portion 37 of the connecting member 3 is fitted from the outside, the diameter of the peripheral surface to be fitted can be reduced. It can be taken big. That is, on the side of the oxygenator 2, since it is restricted by the size of the oxygenator 2, it is difficult to increase the inner diameter of the coupling portion 15, but there is no size restriction on the side of the connecting member 3. This is because it is possible to increase the inner diameter of the outer fitting portion 37. By increasing the diameter of the fitting peripheral surface, the mutual contact area is increased, the supporting force of the connecting member 3 with respect to the artificial lung 2 is large, and a stable fitting state is obtained.

  Further, the second fitting portion 10 has a double cylindrical structure including an outer fitting portion 37 and a large-diameter inner cylinder portion 39, and the coupling portion 15 of the artificial lung 2 includes an inner fitting portion 18 and a small-diameter inner cylinder portion. Since it is a double cylindrical structure consisting of 21, a double-fitted state is obtained. In other words, the supporting force can be further increased by coupling with the main fitting and the auxiliary fitting.

  With the connection structure as described above, the connection member 3 can rotate around the central axis extending in the vertical direction of the cylindrical inner peripheral surface 11 of the first fitting portion 9 with respect to the blood reservoir 1. The oxygenator 2 is rotatable with respect to the connecting member 3 around a central axis extending in the vertical direction of the outer fitting portion 37 of the second fitting portion 10. The central axis of the cylindrical inner peripheral surface 11 (first fitting portion 9) of the connecting member 3 and the central axis of the outer fitting portion 37 (second fitting portion 10) are arranged with a space therebetween. Therefore, the artificial lung 2 can revolve around the coupling portion 8 of the blood reservoir 1 in addition to being able to rotate around the central axis of the second fitting portion 10. is there.

  Thereby, the position of the oxygenator 2 can be set over a wide range around the blood reservoir 1 by adjusting the rotational angle position of the connecting member 3 around the coupling portion 8 of the blood reservoir 1. Furthermore, the posture (orientation) of the oxygenator 2 can be set over a wide range by adjusting the rotation angle of the oxygenator 2 around the second fitting portion 10. Thus, although it is the simple connection structure by the connection member 3, if the setting of both is combined, the mutual positional relationship of the blood reservoir 1 and the oxygenator 2 and the freedom degree of adjustment of an attitude | position can fully be improved. it can.

  According to the connection structure of the medical device of the present invention, the degree of freedom in adjusting the positional relationship and posture of the secondary device with respect to the medical main device is high, and it is possible to obtain a sufficient support force for the secondary device. For example, it is useful for constructing an extracorporeal blood circulation circuit.

DESCRIPTION OF SYMBOLS 1 Blood reservoir 2 Artificial lung 3 Connecting member 4 Main-body part 5 Lid body 6 Blood storage chamber 7 Blood outflow port 8, 15 Connection part 8a Cylindrical outer peripheral surface 9 1st fitting part 10 2nd fitting part 11 Cylindrical inner peripheral surface 12 Holder 13 Artificial Lung Body 14 Protective Covers 14a, 14b First and Second Frames 16 Engaging Claw 17 Engaging Hole 18 Inner Fitting Part 19 Engaging Recesses 20, 38 Gap 21 Small Diameter Inner Cylinder Part 22 Heat Exchange Part 23 Gas exchange part 24, 25 Blood port 26, 27 Cold / hot water port 28, 29 Gas port 30 Horizontally extending part 31 Vertically extending part 32 Inclined surface 33 Locking lever 34 Support shaft part 35 Locking claw 36 Release operation part 37 Outer fitting part 39 Large diameter inner cylinder part

Claims (6)

A coupling portion having a cylindrical circumferential surface provided in each of a medical main device and a sub device;
A coupling member having both first and second fitting portions that are fitted to the cylindrical peripheral surface of the coupling portion of the main device and the auxiliary device, respectively.
The connecting member is rotatable with respect to the main device and the sub device through the fitting of the first and second fitting portions, and is connected to the sub device with respect to the main device through the connecting member. Configured to displaceably support the device;
The coupling part of the auxiliary device is constituted by an inner fitting part,
The medical device connection structure, wherein the second fitting portion is configured by an outer fitting portion that is fitted to the outside of the inner fitting portion. The coupling part of the auxiliary device has a double cylindrical structure in which a small diameter inner cylinder part is provided by forming a gap inside the inner fitting part,
The second fitting part of the connecting member has a double cylindrical structure in which a gap is formed inside the outer fitting part and a large-diameter inner cylinder part is provided,
2. The medical use according to claim 1, wherein the large-diameter inner cylinder portion can be fitted into an outer peripheral surface of the small-diameter inner cylinder portion by entering a gap between the inner fitting portion and the small-diameter inner cylinder portion. Device linkage structure. In the second fitting portion, with the inner fitting portion and the outer fitting portion fitted, the fitting of both fitting portions is removed by engagement with the peripheral wall of the inner fitting portion. A locking lever to regulate is provided,
The locking lever extends in the central axis direction of the outer fitting portion, and is supported by the outer fitting portion at a supporting shaft portion located in the middle in the same direction, and rotates around the supporting shaft portion. Is possible,
A locking claw is provided at the tip of the locking lever, and the locking claw is engaged with a locking recess provided in a peripheral wall of the inner fitting portion. The action to regulate the detachment of the fitting of the part has been obtained,
A release operation portion is provided at the rear end of the locking lever, and the release operation portion is pressed toward the radially inner side of the outer fitting portion to rotate the locking lever around the support shaft portion. The medical device connection structure according to claim 1, wherein by moving, the fitting of the inner fitting portion with respect to the outer fitting portion can be released.   The connecting member has a configuration in which the central axis of rotation of the first fitting portion and the central axis of rotation of the second fitting portion are parallel to each other and spaced from each other. The medical device connection structure according to claim 1.   The connecting member includes a laterally extending portion that extends laterally from the first fitting portion, and a longitudinally extending portion that extends upward from the second fitting portion and is coupled to the laterally extending portion. The medical device connection structure according to claim 4, further comprising a bent structure portion formed at a portion where the laterally extending portion and the longitudinally extending portion are coupled. A blood reservoir having a blood storage chamber partially protruding from the center of the bottom surface of the main body, and having a blood outflow port at the lower end of the blood storage chamber and a blood inflow port at the top of the main body When,
A blood flow path for performing gas exchange by crossing the gas flow path and blood, and an oxygenator connected to the blood reservoir,
The connection structure of the medical device according to any one of claims 1 to 5, wherein the blood reservoir is the main device and the oxygenator is the auxiliary device, and the oxygenator is supported by the blood reservoir.
The coupling part of the blood reservoir that is coupled to the first fitting part of the connecting member is provided to protrude downward at a position separated from the blood reservoir on the bottom surface of the main body part,
The coupling portion of the oxygenator that is coupled to the second fitting portion is provided on an upper portion of the oxygenator,
The extracorporeal circulation processing device in which the central axis of rotation of the first and second fitting portions extends in the vertical direction of the blood reservoir.

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