JP7581321B2 - Heart-lung machine - Google Patents

Description

The present invention relates to a heart-lung machine.

ECMO (Extracorporeal membrane oxygenation) is a treatment using an extracorporeal circulation circuit with an artificial lung and a pump, which substitutes for the respiratory and circulatory functions of patients with severe respiratory failure or circulatory failure until they are treated and recover. ECMO is performed as emergency treatment outside of hospitals, or in intensive care units within hospitals. For this reason, the heart-lung machine used in ECMO needs to be easy to handle when changing the setting of use (for example, when switching from outside of a hospital to inside of a hospital).

For example, German Patent Application Publication No. 10341221 discloses an artificial heart-lung machine used in ECMO. This artificial heart-lung machine comprises an artificial lung, a pump (rotor) for circulating blood through the artificial lung, and a motor for driving the pump. The pump and motor are integrally built into the artificial lung.

In an artificial heart-lung machine, it is desirable that the pump unit (oxygenator and pump) can be easily attached to and detached from the drive unit (motor). In addition, when the pump unit is attached to the drive unit, it is necessary to prevent the pump unit from unintentionally detaching from the drive unit.

The present invention has been made in consideration of these problems, and aims to provide an artificial heart-lung device that allows the pump unit to be easily attached and detached from the drive unit, and has a simple configuration that prevents the pump unit from unintentionally detaching from the drive unit.

One aspect of the present invention is an artificial heart-lung machine comprising a pump unit having an artificial lung and a pump for circulating blood through the artificial lung, and a drive unit having a drive part for driving the pump and formed so that the pump unit is detachable, the drive unit having a drive unit body in which an arrangement space for placing the pump unit and an insertion port for inserting the pump unit into the arrangement space are formed, and an opening/closing part provided on the drive unit body for opening and closing at least a portion of the insertion port, the opening/closing part placing the pump unit in the arrangement space and restricting movement of the pump unit from the insertion port to the outside with at least a portion of the insertion port closed.

Another aspect of the present invention is an artificial heart-lung machine comprising a pump unit having a pump for circulating blood through an artificial lung, and a drive unit having a drive part for driving the pump and formed so that the pump unit is detachable, the drive unit having a drive unit body formed with an arrangement space for placing the pump unit and an insertion port for inserting the pump unit into the arrangement space, and an opening/closing part provided on the drive unit body for opening and closing at least a portion of the insertion port, the opening/closing part placing the pump unit in the arrangement space and restricting movement of the pump unit from the insertion port to the outside with at least a portion of the insertion port closed.

According to the present invention, the pump unit can be attached to the drive unit by inserting the pump unit into the arrangement space through the insertion port with the opening/closing part open and then closing the opening/closing part. On the other hand, when removing the pump unit from the drive unit, the opening/closing part is opened and the pump unit can be taken out from the insertion port. This allows the pump unit to be easily attached and detached from the drive unit. Also, when the pump unit is placed in the arrangement space and the opening/closing part is closed, the opening/closing part restricts the movement of the pump unit from the insertion port to the outside. Therefore, the simple configuration makes it possible to prevent the pump unit from being unintentionally detached from the drive unit.

1 is a perspective view of an artificial heart-lung machine according to a first embodiment of the present invention; FIG. 2 is an exploded perspective view of the heart-lung machine of FIG. 1; FIG. 2 is a schematic diagram showing a pump unit and a drive unit shown in FIG. 1 . FIG. 2 is a partial cross-sectional side view of the heart-lung machine of FIG. 1; 5 is a cross-sectional view taken along line VV in FIG. 4. 3 is an explanatory diagram of the mounting of the pump unit of FIG. 2 to a drive unit. FIG. FIG. 3 is an explanatory diagram of the attachment of the oxygenator main body of FIG. 2 to the expansion unit. FIG. 5 is a perspective view of an artificial heart-lung machine according to a second embodiment of the present invention. FIG. 9 is an explanatory diagram of the attachment of the oxygenator main body of FIG. 8 to the expansion unit. FIG. 11 is a perspective view of an artificial heart-lung machine according to a third embodiment of the present invention. FIG. 11 is an exploded perspective view of FIG. FIG. 12 is a perspective view of the heart-lung machine of FIG. 11 . FIG. 12 is a perspective view of the expansion unit of FIG. 11 . FIG. 14A is an explanatory diagram of a state before the drive unit is pressed by the pressing member, and FIG. 14B is an explanatory diagram of a state after the drive unit is pressed by the pressing member. 14B is a cross-sectional view taken along line XV-XV of FIG. 14B.

Below, we will present a preferred embodiment of the artificial heart-lung device of the present invention and explain it with reference to the attached drawings.

The heart-lung machine 10A to 10C shown below substitutes for the respiratory and circulatory functions of patients with severe respiratory failure or circulatory failure, and is configured to be portable so that the user can carry it with them.

First Embodiment
An artificial heart-lung device 10A according to a first embodiment of the present invention will be described. As shown in Figures 1 and 2, the artificial heart-lung device 10A includes a portable artificial heart-lung body 12 and an expansion unit 14 to which the artificial heart-lung body 12 is detachably formed. The artificial heart-lung body 12 includes a pump unit 16 and a drive unit 18 to which the pump unit 16 is detachably formed.

The pump unit 16 is an artificial lung unit that removes carbon dioxide from blood and supplies oxygen to the blood in extracorporeal circulation. The pump unit 16 is attached to the drive unit 18 (in a horizontal position) so that the axial direction (longitudinal direction) of the pump unit 16 is aligned horizontally (in the direction of the arrow X). The pump unit 16 has an artificial lung 20, a pump 22 (see FIG. 3) for circulating blood through the artificial lung 20, and multiple (two in this embodiment) port portions 24 provided on the artificial lung 20.

In Fig. 2, the artificial lung 20 extends in one direction and has a first end surface 20a and a second end surface 20b. The artificial lung 20 is formed in a cylindrical shape (a cylindrical shape with a bottom). In other words, the artificial lung 20 has an inner hole 26 that opens to the second end surface 20b. The inner hole 26 does not open to the first end surface 20a.

Although detailed illustration is omitted, the artificial lung 20 has, for example, a gas exchange section formed in a cylindrical shape by a plurality of hollow fiber membranes. The gas exchange section includes a gas flow path formed in the inner cavity of each hollow fiber membrane and a blood flow path formed on the outside of each hollow fiber membrane. Oxygen gas and carbon dioxide gas flow through the gas flow path. Blood flows through the blood flow path. Each hollow fiber membrane is configured to allow oxygen gas and carbon dioxide gas to pass through but not blood to pass through. In such a gas exchange section, carbon dioxide in the blood is replaced with oxygen by passing oxygen gas through the gas flow path and blood through the blood flow path. The artificial lung 20 may have a heat exchange section for adjusting the temperature of the blood.

The multiple ports 24 extend linearly from the first end surface 20a of the artificial lung 20 along the longitudinal direction of the artificial lung 20. The ports 24 are for introducing or guiding blood, oxygen gas, carbon dioxide gas, etc. The number, position, size, and shape of the ports 24 can be set as appropriate.

In FIG. 3, the pump 22 is disposed inside the oxygenator 20. The pump 22 is configured as a centrifugal pump. The pump 22 has a rotatable impeller 28 and a power transmission mechanism 30 (power transmission section) for transmitting the driving force of the drive unit 18 to the impeller 28. The rotation axis of the impeller 28 extends along the longitudinal direction (axial direction) of the oxygenator 20. The impeller 28 transfers blood radially outward from the oxygenator 20. The oxygenator 20 is formed with a flow path 31 through which the blood transferred from the impeller 28 is guided.

The power transmission mechanism 30 is provided at the bottom of the inner bore 26 of the artificial lung 20. The power transmission mechanism 30 is a magnetic coupling. However, the power transmission mechanism 30 is not limited to a magnetic coupling, and may be one that can mechanically connect the drive unit 18 and the impeller 28.

As shown in FIG. 2, the drive unit 18 is a unit for driving the pump 22. The power of the drive unit 18 is input from, for example, an external power source. However, the drive unit 18 may have a built-in battery (not shown).

The drive unit 18 includes a drive unit body 36 having an arrangement space 32 for arranging the pump unit 16 and an insertion port 34 for inserting the pump unit 16 into the arrangement space 32, and an opening/closing section 38 for opening and closing a portion of the insertion port 34. The drive unit 18 is formed so that the axis of the oxygenator 20 extends horizontally when the pump unit 16 is arranged in the arrangement space 32. The drive unit body 36 includes a support section 42 for supporting the pump unit 16, a drive section 44 for driving the pump 22, and a cooling fan 46 (see FIG. 3) for cooling the drive section 44.

The support portion 42 includes a support body 48 extending in one direction (arrow X direction) and a support protrusion 50 extending upward (arrow Z1 direction) from the end of the support body 48 in the arrow X2 direction. The support body 48 is formed in a rectangular parallelepiped shape. Both ends of the lower surface of the support body 48 in the width direction (arrow Y direction) are formed in an R shape.

The upper surface of the support body 48 forms part of the arrangement space 32. The end of the upper surface of the support body 48 in the direction of the arrow X1 forms part of the insertion opening 34. The upper surface of the support body 48 is provided with a guide surface 52 formed so as to be recessed downward (in the direction of the arrow Z2).

The guide surface 52 guides the pump unit 16 from the insertion port 34 to the arrangement space 32 when the pump unit 16 is attached to the drive unit 18. The guide surface 52 has an arc-shaped cross section. That is, the guide surface 52 is located below the arrangement space 32 and is formed in a shape corresponding to the shape of the outer peripheral surface of the artificial lung 20. The guide surface 52 extends from one end (the end in the direction of arrow X1) of the support body 48 to the other end (the direction of arrow X2). The total length of the guide surface 52 is longer than the total length of the artificial lung 20. A pair of side grooves 54 communicating with the insertion port 34 are formed at one end of the support body 48. Each side groove 54 extends in the vertical direction (the direction of arrow Z) and opens on the upper surface of the support body 48.

A slide protrusion 56 and a fixed protrusion 58 are provided on each side surface of the support body 48 in the width direction. The slide protrusion 56 is located at the end of each side surface of the support body 48 in the direction of the arrow X2. The slide protrusion 56 extends in the direction of the arrow X and has a rectangular cross section. A first terminal portion 60 is provided on the end face of each slide protrusion 56 in the direction of the arrow X2. Each first terminal portion 60 is made of an electrically conductive material, such as a metal.

2 and 4, the first terminal portion 60 includes a flat first terminal base portion 62 and a first terminal protrusion portion 64 extending from the first terminal base portion 62 in the direction of the arrow X2. The first terminal base portion 62 is fixed to the slide protrusion 56. The extending end portion of the first terminal protrusion portion 64 is formed to be wider than the base portion on the first terminal base portion 62 side.

2, the fixing protrusion 58 is spaced apart in the direction of arrow X1 from the sliding protrusion 56. The fixing protrusion 58 extends in the direction of arrow X and has a rectangular cross section. An engagement recess 66 is formed on the upper surface of the fixing protrusion 58 over the entire length of the fixing protrusion 58. The support protrusion 50 extends over the entire width of the support body 48 (the entire length in the direction of arrow Y).

The drive unit 44 has a motor 68 for rotating the impeller 28. The motor 68 includes a motor body 70 and a shaft portion 72 provided on the motor body 70. The motor body 70 has a motor case 74 provided adjacent to the support protrusion 50 in the direction of arrow X1. An opposing surface 76 is provided on the outer surface of the motor case 74 in the direction of arrow X1, with which the second end surface 20b of the oxygenator 20 faces when the pump unit 16 is attached to the drive unit 18.

As shown in FIG. 3, the shaft portion 72 is inserted into the inner hole 26 of the oxygenator 20 with the pump unit 16 attached to the drive unit 18. The shaft portion 72 has a motor shaft 78 and a shaft cover 80 provided to cover the motor shaft 78. The motor shaft 78 extends linearly along the direction of the arrow X. The shaft cover 80 protrudes in the direction of the arrow X1 from the center of the outer surface of the motor case 74. A gap is formed between the shaft cover 80 and the motor shaft 78. The cooling fan 46 is housed in the motor case 74. However, the cooling fan 46 may be housed inside the support portion 42. The cooling fan 46 supplies cooling air (air) to the gap between the motor shaft 78 and the shaft cover 80.

1 and 2, the opening/closing section 38 is provided at the upper end of the support protrusion 50 so as to be able to open and close a part of the insertion port 34. The opening/closing section 38 has an opening/closing section main body 81 having a shape like an inverted U-shape, and an arm portion 82 that connects the opening/closing section main body 81 and the support protrusion 50 to each other. The opening/closing section main body 81 includes a pair of legs 84 and a connecting portion 85 that connects the ends of the legs 84 to each other. The pair of legs 84 are disposed in each of the pair of side gutters 54 when the opening/closing section 38 is in the closed state (the state of FIG. 1). That is, the opening/closing section main body 81 closes a part of the insertion port 34 when the opening/closing section 38 is in the closed state. The opening/closing section main body 81 has an insertion hole 87 through which the multiple port portions 24 of the pump unit 16 can be inserted.

The opening/closing part 38 places the pump unit 16 in the arrangement space 32 and restricts movement of the pump unit 16 from the insertion opening 34 to the outside with a portion of the insertion opening 34 closed. Specifically, when the opening/closing part 38 is in the closed state, the opening/closing part main body 81 faces (contacts or is close to) the first end surface 20a of the artificial lung 20 placed in the arrangement space 32 (see FIG. 5).

The arm portion 82 is arranged to be tiltable in the direction of arrow X relative to the upper end of the support protrusion 50. The arm portion 82 is curved so as to bulge from the connecting portion 85 in the opposite direction to the pair of legs 84. Therefore, when the pump unit 16 is attached to the drive unit 18 (the state shown in FIG. 1), a space is formed between the oxygenator 20 and the arm portion 82 into which the user's fingers can be inserted. In other words, the arm portion 82 is formed so as to be gripped by the user. In other words, the arm portion 82 also functions as a grip when carrying the drive unit 18.

The drive unit 18 has a locking mechanism 86 for locking the opening/closing part 38 in a closed state. Specifically, in FIG. 2, the locking mechanism 86 has a first engagement portion 88 provided on the groove wall surface of each side gutter 54 and a second engagement portion 90 provided on each leg portion 84. When the opening/closing part 38 is in a closed state, the locking mechanism 86 locks the opening/closing part main body 81 to the support main body 48 by engaging the second engagement portion 90 with the first engagement portion 88.

The first engagement portion 88 is, for example, an engagement hole. The second engagement portion 90 is, for example, an engagement protrusion that fits into the engagement hole. The locking of the opening/closing portion 38 by the locking mechanism 86 is released by operating an unlocking portion (for example, a release button) not shown. The locking mechanism 86 can be modified as appropriate. For example, the first engagement portion 88 may be configured as an engagement protrusion, and the second engagement portion 90 may be configured as an engagement hole.

The expansion unit 14 is a unit for expanding the functions necessary for performing ECMO. The expansion unit 14 has, for example, sensors (flow sensor, temperature sensor, oxygen sensor, air bubble sensor, etc.) not shown. The drive unit 18 is attached to the expansion unit 14 by sliding it horizontally relative to the expansion unit 14.

The expansion unit 14 has a bottom wall portion 92 extending in one direction for supporting the drive unit 18 from below, and a pair of side wall portions 94 protruding upwardly from both widthwise ends of the bottom wall portion 92 so as to face each other.

A bottom wall guide surface 96 is formed in the widthwise center of the upper surface of the bottom wall portion 92 so as to be recessed downward. The bottom wall guide surface 96 is formed in a shape corresponding to the lower surface of the support body 48. In other words, the bottom wall guide surface 96 has a U-shaped cross section and R-shaped corners. The bottom wall guide surface 96 extends from one end to the other end of the bottom wall portion 92. The bottom wall guide surface 96 guides the sliding movement of the drive unit 18.

Each side wall portion 94 extends along a portion of the longitudinal direction of the bottom wall portion 92. In other words, each side wall portion 94 is provided at an end portion of the bottom wall portion 92 in the direction of arrow X. In particular, the total length of each side wall portion 94 is equal to or less than half the total length of the bottom wall portion 92.

A guide groove 97 extending along the longitudinal direction (arrow X direction) of the bottom wall portion 92 and a holding groove 98 communicating with the guide groove 97 are formed on the inner surface of each of the pair of side wall portions 94. One end of the guide groove 97 opens to one end of the side wall portion 94. The guide groove 97 guides the slide protrusion 56 in the longitudinal direction of the bottom wall portion 92.

The retaining groove 98 is connected to the other end of the guide groove 97. The groove width of the retaining groove 98 is wider than the groove width of the guide groove 97. In other words, the retaining groove 98 is wider in both the up and down directions relative to the guide groove 97. The retaining groove 98 opens into the bottom wall guide surface 96.

A second terminal 100 that can be electrically connected to the first terminal 60 is provided on the groove side surface of the holding groove 98 at a portion that faces one end side of the guide groove 97 (in the direction of the arrow X1). The second terminal 100 is made of an electrically conductive material such as a metal.

2 and 4, the second terminal portion 100 includes a flat second terminal base portion 102 and a pair of second terminal protrusions 104 extending from the second terminal base portion 102 in the direction of the arrow X1. The pair of second terminal protrusions 104 face each other at a distance in the vertical direction (arrow Z direction). The first terminal protrusion 64 can be fitted between the opposing second terminal protrusions 104.

The bottom wall portion 92 is provided with a detachment prevention portion 106 that prevents the drive unit 18 from detaching from the bottom wall portion 92 when the drive unit 18 is attached to the expansion unit 14. The detachment prevention portion 106 has a U-shaped lever 107 provided on each of both sides in the width direction of the bottom wall portion 92. The lever 107 is provided so as to be tiltable in the direction of arrow Y relative to the bottom wall portion 92. The lever 107 can be fitted into the fitting recess 66 of the fixing protrusion 58 when the drive unit 18 is attached to the expansion unit 14.

Next, the operation of the heart-lung machine 10A will be described.

When using the heart-lung machine 10A, the user attaches the pump unit 16 to the drive unit 18. Specifically, as shown in Figure 6, the user first tilts the opening/closing part 38 in the direction of arrow X2 while operating the lock release part (not shown). This moves the opening/closing part main body 81 away from the gutter 54 and to the top of the arrangement space 32, opening the entire insertion port 34 of the drive unit 18.

Next, the user inserts the pump unit 16 into the insertion port 34 of the drive unit 18. At this time, the user inserts the pump unit 16 into the insertion port 34 from the second end face 20b side. Then, the pump unit 16 slides horizontally (in the direction of arrow X2) along the guide surface 52 of the drive unit 18, and the shaft portion 72 of the drive unit 18 is inserted into the inner hole 26 of the oxygenator 20.

Then, the user tilts the opening/closing unit 38 in the direction of arrow X1. This causes the pair of legs 84 of the opening/closing unit main body 81 to be inserted into each of the pair of side gutters 54, and the opening/closing unit main body 81 is locked to the drive unit main body 36 by the locking mechanism 86. In this state, a portion of the insertion port 34 of the drive unit 18 is closed by the opening/closing unit main body 81. As a result, one end face of the artificial lung 20 faces the opening/closing unit main body 81. The multiple port portions 24 of the pump unit 16 are inserted into the insertion holes 87 of the opening/closing unit 38. Through the above operations, an artificial heart-lung main body 12 is obtained in which the pump unit 16 and the expansion unit 14 are integrally incorporated.

Next, the user attaches the heart-lung machine main body 12 to the expansion unit 14. Specifically, as shown in FIG. 7, the user slides the drive unit 18 in the direction of the arrow X2 with the lower surface of the drive unit 18 placed on the bottom wall guide surface 96 of the expansion unit 14. Then, the pair of slide protrusions 56 are inserted into the pair of guide grooves 97. Then, the first terminal convex portion 64 fits between the pair of second terminal convex portions 104, and the sliding movement of the drive unit 18 stops. At this time, the protruding end of the first terminal convex portion 64 slides against the inner surface of the second terminal convex portion 104, so that the user can get a clicking sensation (response). Therefore, the user can easily know that the drive unit 18 has reached a predetermined mounting position (the first terminal portion 60 has reached the second terminal portion 100).

The user then tilts the pair of levers 107 in the direction of arrow Y (raising them upwards). This causes each lever 107 to engage with the mating recess 66 of each fixing protrusion 58. This holds the drive unit 18 relative to the expansion unit 14. Through the above operations, an artificial heart-lung device 10A is obtained in which the pump unit 16, drive unit 18 and expansion unit 14 are integrally incorporated.

The heart-lung machine 10A of this embodiment has the following effects:

The drive unit 18 has a drive unit body 36 in which an arrangement space 32 for arranging the pump unit 16 and an insertion port 34 for inserting the pump unit 16 into the arrangement space 32 are formed, and an opening/closing section 38 provided on the drive unit body 36 for opening and closing a portion of the insertion port 34. The opening/closing section 38 arranges the pump unit 16 in the arrangement space 32 and restricts movement of the pump unit 16 from the insertion port 34 to the outside while keeping at least a portion of the insertion port 34 closed.

According to this configuration, the pump unit 16 can be attached to the drive unit 18 by inserting the pump unit 16 into the arrangement space 32 from the insertion port 34 with the opening/closing part 38 open and then closing the opening/closing part 38. On the other hand, when removing the pump unit 16 from the drive unit 18, the opening/closing part 38 can be opened and the pump unit 16 can be taken out from the insertion port 34. This allows the pump unit 16 to be easily attached and detached from the drive unit 18. In addition, when the pump unit 16 is placed in the arrangement space 32 and the opening/closing part 38 is closed, the opening/closing part 38 restricts the movement of the pump unit 16 from the insertion port 34 to the outside. Therefore, the simple configuration can prevent the pump unit 16 from being unintentionally detached from the drive unit 18.

The artificial lung 20 extends in one direction and has a first end surface 20a and a second end surface 20b. When the pump unit 16 is attached to the drive unit 18, the first end surface 20a faces the opening/closing portion 38 and the second end surface 20b faces the drive unit 18.

With this configuration, unintended detachment of the pump unit 16 from the drive unit 18 can be effectively prevented.

The pump 22 has a rotatable impeller 28 and a power transmission mechanism 30 for transmitting the rotational driving force of the drive unit 18 to the impeller 28 when the pump unit 16 is attached to the drive unit 18.

With this configuration, when the pump unit 16 is attached to the drive unit 18, the impeller 28 of the pump unit 16 can be rotated by the motor 68.

The power transmission mechanism 30 is a magnetic coupling.

With this configuration, the configuration of the power transmission mechanism 30 can be simplified.

The artificial lung 20 has an inner hole 26 that opens to the second end face 20b, the power transmission mechanism 30 is provided at the bottom of the inner hole 26 of the artificial lung 20, the drive unit 44 has a motor 68 for rotating the impeller 28, and the shaft portion 72 of the motor 68 is inserted into the inner hole 26 of the artificial lung 20 with the pump unit 16 attached to the drive unit 18.

With this configuration, it is easy to align the power transmission mechanism 30 with the shaft portion 72 of the motor 68.

The drive unit 18 has a cooling fan 46 for supplying cooling air to the shaft portion 72.

With this configuration, the cooling air from the cooling fan 46 can prevent the temperature of the shaft portion 72 of the motor 68 from rising excessively in the inner bore 26 of the artificial lung 20.

The artificial lung 20 is formed in a cylindrical shape, and the drive unit 18 is formed so that the axis of the artificial lung 20 extends horizontally when the pump unit 16 is placed in the arrangement space 32.

With this configuration, the pump unit 16 can be positioned horizontally (so that the axis of the artificial lung 20 is aligned horizontally).

The drive unit body 36 is provided with a guide surface 52 that guides the insertion of the pump unit 16 from the insertion port 34 into the arrangement space 32.

With this configuration, the pump unit 16 can be smoothly inserted into the arrangement space 32 of the drive unit 18.

The guide surface 52 is located below the arrangement space 32 and is formed in a shape corresponding to the shape of the outer peripheral surface of the artificial lung 20.

This configuration allows the pump unit 16 to be inserted more smoothly into the arrangement space 32 of the drive unit 18. The pump unit 16 can also be supported by the guide surface 52. Furthermore, rattling during transportation of the artificial heart-lung device 10A can be reduced.

The drive unit 18 has a locking mechanism 86 for locking the opening/closing section 38 in a closed state.

With this configuration, it is possible to prevent the opening/closing portion 38 from being pushed into the open state by the pump unit 16.

The opening/closing unit 38 has an opening/closing unit main body 81 that closes at least a portion of the insertion port 34 when the opening/closing unit 38 is in a closed state, and an arm portion 82 that connects the opening/closing unit main body 81 and the drive unit main body 36 to each other, and the arm portion 82 is tiltably arranged relative to the drive unit main body 36 and is formed so as to be able to be held by the user.

With this configuration, the user can easily carry the drive unit 18 (artificial lung main body 12 or artificial lung device 10A) by grasping the arm portion 82 of the opening/closing portion 38.

The heart-lung machine 10A is equipped with an expansion unit 14 to which a drive unit 18 can be attached and detached.

With this configuration, it is possible to expand the functions required when performing ECMO.

The expansion unit 14 has a bottom wall portion 92 extending in one direction for supporting the drive unit 18 from below, and a pair of side wall portions 94 protruding upwardly from both widthwise sides of the bottom wall portion 92 so as to face each other.

With this configuration, when the drive unit 18 is attached to the expansion unit 14, the side wall portion 94 can guide the drive unit 18 to the upper surface of the bottom wall portion 92.

A guide groove 97 extending along the longitudinal direction of the bottom wall portion 92 is formed on the inner surface of each of the pair of side wall portions 94, and one end of the guide groove 97 opens into one end of each of the pair of side wall portions 94. The drive unit 18 is provided with a pair of slide protrusions 56 that are guided by the guide groove 97.

With this configuration, the slide protrusion 56 of the drive unit 18 can be inserted into the guide groove 97 of the expansion unit 14, thereby guiding the drive unit 18 horizontally relative to the expansion unit 14.

Each of the pair of side wall portions 94 extends along a portion of the longitudinal direction of the bottom wall portion 92.

With this configuration, since the side wall portion 94 does not extend over the entire length of the bottom wall portion 92, the length over which the slide protrusion 56 slides relative to the guide groove 97 can be shortened. This reduces the load caused by the sliding of the slide protrusion 56 relative to the groove wall surface of the guide groove 97.

A retaining groove 98 that communicates with the other end of the guide groove 97 is formed on the inner surface of each of the pair of side wall portions 94, a first terminal portion 60 is provided on each of the pair of slide protrusions 56, and a second terminal portion 100 that can be electrically connected to the first terminal portion 60 is provided on the groove wall surface of the retaining groove 98 at a portion that faces the other end of the guide groove 97.

With this configuration, the first terminal portion 60 can be electrically connected to the second terminal portion 100 by sliding the slide protrusion 56 into the guide groove 97.

A bottom wall guide surface 96 is formed on the upper surface of the bottom wall portion 92, which is concave downwardly and guides the sliding movement of the drive unit 18, and the retaining groove 98 opens into the bottom wall guide surface 96.

With this configuration, the bottom wall guide surface 96 allows the drive unit 18 to slide smoothly relative to the expansion unit 14. In addition, because the holding groove 98 opens into the bottom wall guide surface 96, any groove that exists in the holding groove 98 due to condensation or the like can escape to the bottom wall guide surface 96. This makes it possible to prevent the first terminal portion 60 and the second terminal portion 100 from getting wet.

The bottom wall guide surface 96 has a U-shaped cross section and rounded corners.

With this configuration, the bottom wall guide surface 96 allows the drive unit 18 to slide more smoothly relative to the expansion unit 14.

The bottom wall portion 92 is provided with a detachment prevention portion 106 that prevents the drive unit 18 from detaching from the bottom wall portion 92 when the drive unit 18 is attached to the expansion unit 14.

With this configuration, it is possible to effectively prevent the drive unit 18 from becoming detached from the expansion unit 14.

Second Embodiment
Next, an artificial heart-lung machine 10B according to a second embodiment of the present invention will be described. In the artificial heart-lung machine 10B of the second embodiment, the same components as those in the artificial heart-lung machine 10A according to the first embodiment described above are given the same reference numerals, and detailed description will be omitted. In the artificial heart-lung machine 10B, the same configuration as the artificial heart-lung machine 10A described above has the same effects.

8 and 9, the heart-lung machine 10B includes a portable heart-lung machine main body 12a and an expansion unit 14a to which the heart-lung machine main body 12a is detachably formed. The heart-lung machine main body 12a includes a pump unit 16 and a drive unit 18a to which the pump unit 16 is detachably formed. The pump unit 16 is attached to the drive unit 18a (in a horizontal position) so that the axial direction (longitudinal direction) of the pump unit 16 is aligned horizontally.

9, the drive unit 18a includes a drive unit body 36, an opening/closing portion 38, and an arm portion 82. A first slide protrusion 110 and a second slide protrusion 112 are provided on each side surface in the width direction of the support body 48 of the drive unit body 36.

Each first slide protrusion 110 is a shortened version of the above-mentioned slide protrusion 56 in the direction of arrow X. A first terminal portion 60 is provided on the outer surface of the first slide protrusion 110 in the direction of arrow X2. Each second slide protrusion 112 is a shortened version of the above-mentioned slide protrusion 56 in the direction of arrow X. The second slide protrusion 112 is spaced apart from the first slide protrusion 110 in the direction of arrow X1.

The expansion unit 14a has a bottom wall portion 92, a pair of first side wall portions 114, a pair of second side wall portions 116, and a detachment prevention portion 118. The pair of first side wall portions 114 protrude upward from both sides in the width direction of the bottom wall portion 92 so as to face each other. The pair of first side wall portions 114 are located at the ends of the bottom wall portion 92 in the direction of the arrow X2. A first guide groove 120 into which the first slide protrusion 110 is inserted is formed on the inner surface of each of the pair of first side wall portions 114. The first guide groove 120 opens on the outer surface of the first side wall portion 114 in the direction of the arrow X1. The second terminal portion 100 is provided on the groove wall surface of the first guide groove 120 that faces the direction of the arrow X1.

The pair of second sidewall portions 116 protrude upward from both widthwise ends of the bottom wall portion 92 so as to face each other. The pair of second sidewall portions 116 are positioned spaced apart in the direction of arrow X1 from the pair of first sidewall portions 114. A second guide groove 122 into which the second slide protrusion 112 is inserted is formed on the inner surface of each of the pair of second sidewall portions 116. The second guide groove 122 opens onto the outer surface of the second sidewall portion 116 in the direction of arrow X1.

The detachment prevention portion 118 is for restricting movement of the drive unit 18a in the direction of the arrow X1 relative to the expansion unit 14a. The detachment prevention portion 118 includes a non-circular stopper portion 124 rotatably provided on the end face of the bottom wall portion 92 in the direction of the arrow X1, and a knob portion 126 provided on the stopper portion 124. The stopper portion 124 has a shape in which part of the peripheral wall of a circular plate material is cut out along the chord of the circle.

The stopper portion 124 can be switched between a fixed position in which a part (outer periphery) of the stopper portion 124 protrudes above the upper surface of the bottom wall portion 92 (the lowermost part of the bottom wall guide surface 96) and a released position in which the entire stopper portion 124 is located below the upper surface of the bottom wall portion 92 (the lowermost part of the bottom wall guide surface 96) by rotating the stopper portion 124. The knob portion 126 is a convex portion that protrudes from the outer surface of the stopper portion 124 in the opposite direction to the bottom wall portion 92.

In this type of artificial heart-lung device 10B, when attaching the drive unit 18a of the artificial heart-lung main body 12a to the expansion unit 14a, the following operation is performed. The user places the bottom surface of the drive unit 18a on the bottom wall guide surface 96 of the expansion unit 14a so that the first slide protrusion 110 is positioned between the first side wall portion 114 and the second side wall portion 116 and the second slide protrusion 112 is positioned in the direction of arrow X1 relative to the second side wall portion 116. Next, the user moves the drive unit 18a in the direction of arrow X2 relative to the expansion unit 14a.

Then, the first slide protrusion 110 is inserted into the first guide groove 120 and the second slide protrusion 112 is inserted into the second guide groove 122. Then, the first terminal protrusion 64 fits between the pair of second terminal protrusions 104, thereby stopping the sliding movement of the drive unit 18a.

8, the user holds the knob 126 and rotates the stopper 124 relative to the expansion unit 14a to switch the stopper 124 from the release position to the fixed position. This causes the drive unit 18a to be held relative to the expansion unit 14a.

The heart-lung machine 10B of this embodiment has the following effects:

The detachment prevention portion 118 has a non-circular stopper portion 124 rotatably provided on the end surface of the bottom wall portion 92, and the stopper portion 124 can be switched, by rotation of the stopper portion 124, between a fixed position in which a portion of the stopper portion 124 protrudes above the upper surface of the bottom wall portion 92 and a released position in which the entire stopper portion 124 is positioned below the upper surface of the bottom wall portion 92.

With this configuration, the configuration of the detachment prevention unit 118 can be simplified.

The expansion unit 14a has a bottom wall portion 92 that extends in one direction and supports the drive unit 18a from below, and a pair of first side wall portions 114 and a pair of second side wall portions 116 that protrude upward from both sides in the width direction of the bottom wall portion 92 so as to face each other. The pair of first side wall portions 114 and the pair of second side wall portions 116 are spaced apart from each other in the longitudinal direction of the bottom wall portion 92. A first guide groove 120 is formed on the inner surface of each of the pair of first side wall portions 114, and a second guide groove 122 is formed on the inner surface of each of the pair of second side wall portions 116. The drive unit 18a is provided with a pair of first slide protrusions 110 guided by the first guide groove 120 and a pair of second slide protrusions 112 guided by the second guide groove 122.

With this configuration, the sliding length of the first slide protrusion 110 and the second slide protrusion 112 relative to the first guide groove 120 and the second guide groove 122 can be made relatively short.

Third Embodiment
Next, an artificial heart-lung machine 10C according to a third embodiment of the present invention will be described. In the artificial heart-lung machine 10C of the third embodiment, the same components as those in the artificial heart-lung machine 10A according to the first embodiment described above are given the same reference numerals, and detailed description will be omitted. In the artificial heart-lung machine 10C, the same configuration as the artificial heart-lung machine 10A described above has the same effects.

10 and 11, the heart-lung machine 10C includes a portable heart-lung machine main body 12b and an expansion unit 14b to which the heart-lung machine main body 12b is detachably formed. The heart-lung machine main body 12b includes a pump unit 16a and a drive unit 18b to which the pump unit 16a is detachably formed. The pump unit 16a is attached to the drive unit 18b so that the axial direction (longitudinal direction) of the pump unit 16a is aligned vertically (in a vertically placed state).

The pump unit 16a differs from the pump unit 16 described above in the positions of the multiple port portions 24. In the pump unit 16a, each port portion 24 extends linearly from the outer peripheral surface of the artificial lung 20 along the longitudinal direction of the artificial lung 20. Each port portion 24 is located on one end side of the artificial lung 20.

As shown in FIG. 11, the drive unit 18b comprises a drive unit body 134 having a first arrangement space 130 for arranging the pump unit 16a and an insertion port 132 for inserting the pump unit 16a into the first arrangement space 130, and an opening/closing portion 136 for opening and closing the insertion port 132.

The drive unit body 134 has a support part 138 that supports the artificial lung 20, a drive part 44 for driving the pump 22, and the above-mentioned cooling fan 46 (see Figure 3) that cools the drive part 44.

The support portion 138 is formed in a U-shape. Specifically, the support portion 138 has a support portion main body 142 extending in one direction (the direction of the arrow X in FIG. 10), a first support wall portion 144 provided at one end of the support portion main body 142 (the end in the direction of the arrow X1), and a second support wall portion 146 provided at the other end of the support portion main body 142 (the end in the direction of the arrow X2). Each of the first support wall portion 144 and the second support wall portion 146 extends upward from the upper surface of the support portion main body 142. A first arrangement space 130 is formed between the first support wall portion 144 and the second support wall portion 146.

A locking protrusion 148 is provided on each side surface in the width direction (arrow Y direction) of the support body 142. The locking protrusion 148 has a shape like a metal plate bent at 90 degrees. The locking protrusion 148 protrudes outward in the width direction of the support body 142. Both corners of the outer surface of the first support wall portion 144 on the side opposite the support body 142 (arrow X1 direction) are formed in an R shape.

As shown in Figures 11 and 14A, a first hole 150 and a pair of second holes 152 are provided on the outer surface of the first support wall portion 144 in the direction of arrow X1. The first hole 150 is located at the lower part of the first support wall portion 144. The first hole 150 is located at the center of the width direction (direction of arrow Y) of the first support wall portion 144. The first hole 150 extends in a rectangular shape along the width direction of the first support wall portion 144. A plate-shaped first terminal portion 154 is provided on the bottom surface of the first hole 150.

The pair of second holes 152 are positioned so as to sandwich the first hole 150 in the direction of the arrow Y. Each second hole 152 is formed in a circular shape. The inner circumferential surface of each second hole 152 tapers from the opening of the fitting hole toward the bottom surface (see FIG. 14A).

11 and 12, both corners of the outer surface of the second support wall 146 on the side opposite to the support body 142 (arrow X2 direction) are formed in an R-shape. The outer surface of the second support wall 146 in the arrow X2 direction is provided with a protrusion 156 protruding in the arrow X2 direction. The protrusion 156 is located at the lower part of the second support wall 146. The protrusion 156 is formed in a square shape when viewed from the longitudinal direction of the support 138. The protrusion 156 is located at the center of the width direction of the second support wall 146. On the outer surface of the protrusion 156 on the side opposite to the second support wall 146, a first tapered surface 156a is formed that is inclined from the lower end (end in the arrow Z2 direction) of the protrusion 156 to the upper end (end in the arrow Z1 direction) of the second support wall 146 side (arrow X1 direction).

A plurality of insertion holes 158 through which the plurality of port portions 24 are inserted are formed in the upper end surface of the second support wall portion 146. Each insertion hole 158 penetrates the second support wall portion 146 in the direction of the arrow X and opens into the upper surface of the second support wall portion 146.

11, the drive unit 44 has a motor 68 for rotating the impeller 28 (see FIG. 3) described above. The motor 68 is provided on the upper surface of the support unit main body 142 so that the shaft portion 72 is aligned in the vertical direction. That is, the shaft portion 72 of the motor 68 extends upward from the motor case 74. The upper surface of the motor case 74 is provided with an opposing surface 76 that faces the second end surface 20b of the oxygenator 20 when the pump unit 16a is arranged in the first arrangement space 130.

The opening/closing section 136 is for opening and closing the entire insertion opening 132. The opening/closing section 136 is formed in a flat plate shape. The opening/closing section 136 is provided on the upper part of the first support wall section 144 via a hinge 160 so as to be openable and closable.

The opening/closing part 136 places the pump unit 16a in the first arrangement space 130 and restricts the movement of the pump unit 16a from the insertion opening 132 to the outside when the insertion opening 132 is closed. Specifically, the opening/closing part 136 faces (contacts or is close to) the first end surface 20a of the pump unit 16a placed in the first arrangement space 130 when the opening/closing part 136 is in the closed state.

11 and 13, the expansion unit 14b has a bottom wall portion 162 extending in one direction to support the drive unit 18b from below, a first side wall portion 164 provided at one end (the end in the direction of arrow X1) of the bottom wall portion 162, and a second side wall portion 166 provided at the other end (the end in the direction of arrow X2) of the bottom wall portion 162. The first side wall portion 164 and the second side wall portion 166 face each other in the direction of arrow X. The first side wall portion 164 and the second side wall portion 166 extend above the upper surface of the bottom wall portion 162. A second arrangement space 168 in which the drive unit 18b can be arranged is provided between the first side wall portion 164 and the second side wall portion 166.

Each side surface of the bottom wall portion 162 in the width direction is provided with a fastener 170 for engaging the locking protrusion 148. The fastener 170 has a claw portion 172 for pressing the upper surface of the locking protrusion 148 downward.

A concave first guide surface 174 for vertically guiding the first support wall 144 of the drive unit 18b is formed on the wall surface of the first side wall 164 on the side of the second side wall 166. The first guide surface 174 has a shape corresponding to the outer shape of the first support wall 144 in the direction of arrow X1. The first guide surface 174 has a U-shaped cross section and both corners are rounded.

13 and 14A, a housing hole 178 for housing a pressing member 176 is formed in the lower part of the first guide surface 174. The pressing member 176 is for pressing the drive unit 18b toward the second side wall portion 166 when the drive unit 18b is disposed in the second arrangement space 168.

The pressing member 176 is disposed in the accommodation hole 178 so as to be movable along the longitudinal direction of the bottom wall portion 162 relative to the first side wall portion 164. A central convex portion 180 and a pair of pressing protrusions 182 protrude from the surface of the pressing member 176 on the second side wall portion 166 side. The central convex portion 180 is inserted into the first hole 150 of the drive unit 18b when the drive unit 18b is attached to the expansion unit 14b. The central convex portion 180 is located in the center of the pressing member 176 in the direction of the arrow Y. The central convex portion 180 extends in a rectangular shape along the direction of the arrow Y. The protruding end surface of the central convex portion 180 is provided with a second terminal portion 184 that is electrically connected to the first terminal portion 154 when the central convex portion 180 is inserted into the first hole 150.

Each of the pair of pressing protrusions 182 is inserted into each of the second holes 152 of the drive unit 18b when the drive unit 18b is attached to the expansion unit 14b. The pair of pressing protrusions 182 are positioned to sandwich the central convex portion 180 from the direction of the arrow Y. Each pressing protrusion 182 is formed in a truncated cone shape. In other words, the outer peripheral surface of the pressing protrusion 182 tapers from the base of the pressing protrusion 182 on the pressing member 176 side to the protruding end. The tapered surface of the pressing protrusion 182 abuts against the tapered surface of the second hole 152.

The pressing member 176 moves in the direction of the arrow X by rotating an operating unit 186 provided on the first side wall portion 164. The operating unit 186 is provided on the side surface of the first side wall portion 164 in the direction of the arrow Y. However, the position of the operating unit 186 can be changed as appropriate.

A concave second guide surface 188 for vertically guiding the second support wall portion 146 of the drive unit 18b is formed on the wall surface of the second side wall portion 166 facing the first side wall portion 164. The second guide surface 188 has a shape corresponding to the outer surface shape of the second side wall portion 166 in the direction of arrow X2. The second guide surface 188 has a U-shaped cross section and both corners are rounded.

A recess 190 is formed in the lower portion of the second side wall portion 166, into which the protrusion 156 of the drive unit 18b can be inserted. The recess 190 is located at the center of the second guide surface 188 in the direction of arrow Y. The bottom surface of the recess 190 is formed with a second tapered surface 190a that is inclined in the direction of arrow X1 from the lower end to the upper end of the groove portion.

Next, the operation of the heart-lung machine 10C will be described.

The user opens the opening/closing portion 136 of the drive unit 18b and inserts the pump unit 16a downward into the first arrangement space 130 through the insertion port 132. This causes the second end surface 20b of the artificial lung 20 to abut against the opposing surface 76 of the drive unit body 134. The multiple ports 24 of the pump unit 16a are inserted into the insertion holes 158 of the second support wall portion 146.

Next, the user closes the opening/closing unit 136. This causes the entire insertion port 132 to be closed by the opening/closing unit 136. In other words, the first end surface 20a of the artificial lung 20 faces the opening/closing unit 136. Through the above operations, an artificial heart-lung unit 12b is obtained in which the pump unit 16a and the expansion unit 14b are integrally incorporated.

Then, the user attaches the heart-lung machine main body 12b to the expansion unit 14b. Specifically, the user inserts the drive unit 18b downward into the second arrangement space 168 of the expansion unit 14b. At this time, the first support wall portion 144 of the drive unit 18b is guided downward by the first guide surface 174, and the second support wall portion 146 of the drive unit 18b is guided downward by the second guide surface 188. Then, when the bottom surface of the drive unit 18b abuts against the upper surface of the bottom wall portion 162 of the expansion unit 14b, the user rotates the operation portion 186. Then, as shown in Figures 14A and 14B, the pressing member 176 moves in the direction of the arrow X2, and the central convex portion 180 is inserted into the first hole 150 and each pressing protrusion 182 is inserted into the second hole 152.

The drive unit 18b, which is pushed in the direction of the arrow X2 by the pressing member 176, moves toward the second side wall portion 166. Therefore, the protrusion 156 provided on the second support wall portion 146 is inserted into the recess 190 of the second side wall portion 166 (see Figures 14B and 15). This causes the first tapered surface 156a and the second tapered surface 190a to face each other (contact or close to each other). This prevents the drive unit 18b from slipping out upward relative to the expansion unit 14b. In addition, the second terminal portion 184 provided on the central protrusion portion 180 is electrically connected to the first terminal portion 154.

Next, the user presses the locking projection 148 downward with the claw portion 172 of the fastener 170. This fixes the drive unit 18b to the expansion unit 14b. Through the above operations, the artificial heart-lung machine 10C is obtained in which the pump unit 16a, drive unit 18b, and expansion unit 14b are integrally assembled.

The heart-lung machine 10C of this embodiment has the following effects:

The artificial lung 20 is formed in a cylindrical shape, and the drive unit 18b is formed so that the axis of the artificial lung 20 extends vertically when the pump unit 16a is arranged in the first arrangement space 130.

With this configuration, the pump unit 16a can be positioned vertically (so that the axis of the artificial lung 20 is aligned vertically).

The heart-lung machine 10C is equipped with an expansion unit 14b to which the drive unit 18b can be attached and detached.

With this configuration, it is possible to expand the functions required when performing ECMO.

The expansion unit 14b has a bottom wall portion 162 extending in one direction to support the drive unit 18b from below, and a first side wall portion 164 and a second side wall portion 166 arranged opposite each other at both longitudinal ends of the bottom wall portion 162, and a second arrangement space 168 in which the drive unit 18b is arranged is formed between the first side wall portion 164 and the second side wall portion 166.

With this configuration, when the drive unit 18b is attached to the expansion unit 14b, the drive unit 18b can be guided into the second arrangement space 168 by the first side wall portion 164 and the second side wall portion 166.

A first guide surface 174 having a shape corresponding to the shape of the outer surface of the drive unit body 134 is formed on the inner surface of the first side wall portion 164, and a second guide surface 188 having a shape corresponding to the shape of the outer surface of the drive unit body 134 is formed on the inner surface of the second side wall portion 166.

With this configuration, the first guide surface 174 and the second guide surface 188 can effectively guide the drive unit 18b into the second arrangement space 168.

The expansion unit 14b has a pressing member 176 that presses the drive unit 18b toward the second side wall portion 166 when the drive unit 18b is arranged in the second arrangement space 168, and the pressing member 176 is arranged in an accommodation hole 178 formed in the first guide surface 174 so as to be movable in the longitudinal direction of the bottom wall portion 162.

With this configuration, the drive unit 18b can be held against the second side wall portion 166 by the pressing member 176.

The pressing member 176 is provided with a pressing protrusion 182 that protrudes toward the second side wall portion 166, and the drive unit 18b is formed with a second hole 152 into which the pressing protrusion 182 is inserted.

With this configuration, the drive unit 18b can be effectively held relative to the expansion unit 14b.

The pressure projection 182 tapers in diameter in the protruding direction, and the second hole 152 tapers in diameter from the opening of the second hole 152 toward the bottom surface.

This configuration makes it easier to insert the pressing protrusion 182 into the second hole 152.

The present invention is not limited to the above-described embodiments, and various modifications are possible without departing from the spirit and scope of the present invention.

In the artificial heart-lung machine 10A, 10B, one each of the first terminal portion 60 and the second terminal portion 100 may be provided. In the above-described embodiment, the pump unit 16, 16a includes an artificial lung 20 and a pump 22. However, the pump unit of the artificial heart-lung machine according to the present invention may include the pump 22 and not include the artificial lung 20.

The above embodiments can be summarised as follows:

The above embodiment discloses an artificial heart-lung device (10A-10C) including a pump unit (16, 16a) having an artificial lung (20) and a pump (22) for circulating blood through the artificial lung, and a drive unit (18, 18a, 18b) having a drive section (44) for driving the pump and in which the pump unit is formed so as to be detachable, the drive unit having a drive unit body (36, 134) in which an arrangement space (32, 130) for arranging the pump unit and an insertion port (34, 132) for inserting the pump unit into the arrangement space are formed, and an opening/closing section (38, 136) provided on the drive unit body for opening and closing at least a portion of the insertion port, the opening/closing section disposing the pump unit in the arrangement space and restricting movement of the pump unit from the insertion port to the outside with at least a portion of the insertion port closed.

In the above-mentioned artificial heart-lung device, the artificial lung extends in one direction and has a first end face (20a) and a second end face (20b), and when the pump unit is attached to the drive unit, the first end face faces the opening/closing portion and the second end face faces the drive unit.

In the above-mentioned artificial heart-lung device, the pump may have a rotatable impeller (28) and a power transmission section (30) for transmitting the rotational driving force of the drive unit to the impeller when the pump unit is attached to the drive unit.

In the above-mentioned artificial heart-lung device, the power transmission part may be a magnetic coupling.

In the above-mentioned artificial heart-lung device, the artificial lung has an inner hole (26) that opens to the second end face, the power transmission unit is provided at the bottom of the inner hole of the artificial lung, the drive unit has a motor (68) for rotating the impeller, and the shaft portion (72) of the motor may be inserted into the inner hole of the artificial lung with the pump unit attached to the drive unit.

In the above-mentioned artificial heart-lung machine, the drive unit may have a cooling fan (46) for supplying cooling air to the shaft portion.

In the above-mentioned artificial heart-lung device, the artificial lung may be formed in a cylindrical shape, and the drive unit may be formed so that the axis of the artificial lung extends horizontally when the pump unit is disposed in the arrangement space.

In the above-mentioned artificial heart-lung device, the drive unit body may be provided with a guide surface (52) for guiding the insertion of the pump unit from the insertion port into the arrangement space.

In the above-mentioned artificial heart-lung device, the guide surface may be located below the arrangement space and formed into a shape corresponding to the shape of the outer peripheral surface of the artificial lung.

In the above-mentioned artificial heart-lung device, the drive unit may have a locking mechanism (86) for locking the opening and closing part in a closed state.

In the above-mentioned artificial heart-lung device, the opening/closing part has an opening/closing part main body (81) that closes at least a portion of the insertion opening when the opening/closing part is in a closed state, and an arm part (82) that connects the opening/closing part main body and the drive unit main body to each other, and the arm part may be tiltably arranged relative to the drive unit main body and formed so as to be grippable by a user.

In the above-mentioned heart-lung machine, the heart-lung machine may be provided with an expansion unit (14, 14a) to which the drive unit is detachable.

In the above-mentioned artificial heart-lung device, the expansion unit may have a bottom wall portion (92) extending in one direction to support the drive unit from below, and a pair of side wall portions (94) protruding upwardly from both widthwise sides of the bottom wall portion so as to face each other.

In the above-mentioned artificial heart-lung device, a guide groove (97) extending along the longitudinal direction of the bottom wall portion is formed on the inner surface of each of the pair of side wall portions, one end of the guide groove opens into one end of each of the pair of side wall portions, and the drive unit may be provided with a pair of slide protrusions (56) guided by the guide groove.

In the above-mentioned heart-lung machine, each of the pair of side wall portions may extend along a portion of the longitudinal direction of the bottom wall portion.

In the above-mentioned artificial heart-lung device, a retaining groove (98) communicating with the other end of the guide groove is formed on the inner surface of each of the pair of side wall portions, a first terminal portion (60) is provided on at least one of the pair of slide protrusions, and a second terminal portion (100) electrically connectable to the first terminal portion may be provided on a portion of the groove wall surface of the retaining groove that faces one end side of the guide groove.

In the above-mentioned artificial heart-lung device, a bottom wall guide surface (96) is formed on the upper surface of the bottom wall portion so as to be concave downward and guide the sliding movement of the drive unit, and the retaining groove may open into the bottom wall guide surface.

In the above-mentioned artificial heart-lung device, the bottom wall guide surface may have a U-shaped cross section and an R-shaped corner.

In the above-mentioned artificial heart-lung device, the bottom wall portion may be provided with a detachment prevention portion (106, 118) that prevents the drive unit from detaching from the bottom wall portion when the drive unit is attached to the expansion unit.

In the above-mentioned artificial heart-lung machine, the detachment prevention portion may have a non-circular stopper portion (124) rotatably provided on the end surface of the bottom wall portion, and the stopper portion may be switchable, by rotation of the stopper portion, between a fixed position in which a part of the stopper portion protrudes above the upper surface of the bottom wall portion and a released position in which the entire stopper portion is positioned below the upper surface of the bottom wall portion.

In the above-mentioned artificial heart-lung device, the expansion unit has a bottom wall portion (92) extending in one direction and supporting the drive unit from below, and a pair of first side wall portions (114) and a pair of second side wall portions (116) protruding upward from both sides in the width direction of the bottom wall portion so as to face each other, the pair of first side wall portions and the pair of second side wall portions are spaced apart from each other in the longitudinal direction of the bottom wall portion, a first guide groove (120) is formed on the inner surface of each of the pair of first side wall portions, and a second guide groove (122) is formed on the inner surface of each of the pair of second side wall portions, and the drive unit may be provided with a pair of first slide protrusions (110) guided by the first guide groove and a pair of second slide protrusions (112) guided by the second guide groove.

In the above-mentioned artificial heart-lung device, the artificial lung may be formed in a cylindrical shape, and the drive unit may be formed so that the axis of the artificial lung extends vertically when the pump unit is placed in the arrangement space.

In the above-mentioned heart-lung machine, the heart-lung machine may be provided with an expansion unit (14b) to which the drive unit is detachable.

In the above-mentioned artificial heart-lung device, the expansion unit has a bottom wall portion (162) extending in one direction for supporting the drive unit from below, and a first side wall portion (164) and a second side wall portion (166) arranged opposite each other at both longitudinal ends of the bottom wall portion, and the arrangement space is a first arrangement space (130), and a second arrangement space (168) in which the drive unit is arranged may be formed between the first side wall portion and the second side wall portion.

In the above-mentioned artificial heart-lung device, a first guide surface (174) having a shape corresponding to the shape of the outer surface of the drive unit body may be formed on the inner surface of the first side wall portion, and a second guide surface (188) having a shape corresponding to the shape of the outer surface of the drive unit body may be formed on the inner surface of the second side wall portion.

In the above-mentioned artificial heart-lung device, the expansion unit has a pressing member (176) that presses the drive unit toward the second side wall portion when the drive unit is placed in the second placement space, and the pressing member may be arranged in an accommodation hole (178) formed in the first guide surface so as to be movable in the longitudinal direction of the bottom wall portion.

In the above-mentioned artificial heart-lung device, the pressing member may be provided with a pressing protrusion (182) protruding toward the second side wall portion, and the drive unit may be formed with a hole (152) into which the pressing protrusion is inserted.

In the above-mentioned artificial heart-lung device, the pressure projection may be tapered in diameter in the protruding direction, and the hole may be tapered in diameter from the opening of the hole toward the bottom surface.

The above embodiment discloses an artificial heart-lung device comprising a pump unit having a pump for circulating blood through an artificial lung, and a drive unit having a drive part for driving the pump and in which the pump unit is formed so as to be detachable, the drive unit having a drive unit body in which an arrangement space for placing the pump unit and an insertion port for inserting the pump unit into the arrangement space are formed, and an opening/closing part provided on the drive unit body for opening and closing at least a portion of the insertion port, the opening/closing part placing the pump unit in the arrangement space and restricting movement of the pump unit from the insertion port to the outside with at least a portion of the insertion port closed.

Claims (29)

An artificial heart-lung device comprising: a pump unit having an artificial lung and a pump for circulating blood through the artificial lung; and a drive unit having a drive section for driving the pump and having the pump unit formed so as to be detachable,
The drive unit includes:
a drive unit body having an arrangement space for arranging the pump unit and an insertion port for inserting the pump unit into the arrangement space;
an opening/closing section provided in the drive unit body for opening and closing at least a portion of the insertion opening,
The opening/closing section places the pump unit in the placement space and restricts movement of the pump unit from the insertion opening to the outside while closing at least a portion of the insertion opening. 2. The heart-lung machine of claim 1,
The oxygenator extends in one direction and has a first end surface and a second end surface,
the first end surface faces the opening/closing portion and the second end surface faces the drive unit when the pump unit is attached to the drive unit. 3. The heart-lung machine according to claim 2,
The pump comprises:
A rotatable impeller;
a power transmission section for transmitting the rotational driving force of the drive unit to the impeller when the pump unit is attached to the drive unit. 4. The heart-lung machine of claim 3,
The power transmission unit is a magnetic coupling. 5. The heart-lung machine according to claim 3,
The oxygenator has an inner hole that opens to the second end surface,
The power transmission unit is provided at the bottom of the inner lumen of the oxygenator,
The drive unit has a motor for rotating the impeller,
An artificial heart-lung device, wherein the shaft portion of the motor is inserted into the inner lumen of the artificial lung with the pump unit attached to the drive unit. 6. The heart-lung machine of claim 5,
The drive unit has a cooling fan for supplying cooling air to the shaft portion. The heart-lung machine according to any one of claims 1 to 6,
The oxygenator is formed in a cylindrical shape,
The drive unit is formed so that the axis of the oxygenator extends horizontally when the pump unit is disposed in the arrangement space. 8. The heart-lung machine of claim 7,
The drive unit body is provided with a guide surface that guides the insertion of the pump unit from the insertion opening into the arrangement space. 9. The heart-lung machine of claim 8,
An artificial heart-lung device, wherein the guide surface is located below the arrangement space and is formed into a shape corresponding to the shape of the outer peripheral surface of the artificial lung. The heart-lung machine according to any one of claims 7 to 9,
The drive unit has a locking mechanism for locking the opening/closing part in a closed state. 11. The heart-lung machine of claim 10,
The opening and closing portion is
an opening/closing unit main body that closes at least a portion of the insertion opening when the opening/closing unit is in a closed state;
an arm portion that connects the opening/closing portion main body and the drive unit main body to each other,
The arm portion is tiltably provided with respect to the drive unit body and is configured to be grippable by a user. The heart-lung machine according to any one of claims 7 to 11,
The heart-lung machine includes an expansion unit to which the drive unit is detachable. 13. The heart-lung machine of claim 12,
The expansion unit includes:
a bottom wall portion extending in one direction to support the drive unit from below;
a pair of side walls protruding upwardly from both sides in the width direction of the bottom wall so as to face each other, 14. The heart-lung machine of claim 13,
A guide groove is formed on each inner surface of the pair of side walls, the guide groove extending along the longitudinal direction of the bottom wall,
One end of the guide groove opens to one end of each of the pair of side wall portions,
The drive unit is provided with a pair of slide protrusions that are guided by the guide grooves. 15. The heart-lung machine of claim 14,
An artificial heart-lung machine, wherein each of the pair of side wall portions extends along a portion of the longitudinal direction of the bottom wall portion. 16. The heart-lung machine according to claim 14 or 15,
A holding groove is formed on an inner surface of each of the pair of side walls, the holding groove being connected to the other end of the guide groove,
At least one of the pair of slide protrusions is provided with a first terminal portion,
An artificial heart-lung machine, wherein a second terminal portion electrically connectable to the first terminal portion is provided on a portion of the groove wall surface of the holding groove that faces one end side of the guide groove. 17. The heart-lung machine of claim 16,
a bottom wall guide surface that is recessed downward and guides the sliding movement of the drive unit is formed on an upper surface of the bottom wall portion;
The retaining groove opens into the bottom wall guide surface. 18. The heart-lung machine of claim 17,
In the heart-lung machine, the bottom wall guide surface has a U-shaped cross section and has R-shaped corners. The heart-lung machine according to any one of claims 13 to 18,
The bottom wall portion is provided with a detachment prevention portion that prevents the drive unit from detaching from the bottom wall portion when the drive unit is attached to the expansion unit, in the artificial heart-lung device. 20. The heart-lung machine of claim 19,
The separation prevention portion has a non-circular stopper portion rotatably provided on an end surface of the bottom wall portion,
The stopper portion can be switched, by rotating the stopper portion, between a fixed position in which a portion of the stopper portion protrudes above the upper surface of the bottom wall portion and a released position in which the entire stopper portion is positioned below the upper surface of the bottom wall portion. 13. The heart-lung machine of claim 12,
The expansion unit includes:
a bottom wall portion extending in one direction and supporting the drive unit from below;
a pair of first side wall portions and a pair of second side wall portions protruding upward from both sides in a width direction of the bottom wall portion so as to face each other;
The pair of first side wall portions and the pair of second side wall portions are spaced apart from each other in a longitudinal direction of the bottom wall portion,
A first guide groove is formed on each inner surface of the pair of first side wall portions,
A second guide groove is formed on each inner surface of the pair of second side walls,
The drive unit includes:
a pair of first slide protrusions guided by the first guide grooves;
a pair of second slide protrusions guided by the second guide grooves. The heart-lung machine according to any one of claims 1 to 6,
The oxygenator is formed in a cylindrical shape,
The drive unit is formed so that the axis of the oxygenator extends vertically when the pump unit is disposed in the arrangement space. 23. The heart-lung machine of claim 22,
The heart-lung machine includes an expansion unit to which the drive unit is detachable. 24. The heart-lung machine of claim 23,
The expansion unit includes:
a bottom wall portion extending in one direction to support the drive unit from below;
a first side wall portion and a second side wall portion provided opposite each other at both longitudinal ends of the bottom wall portion,
The arrangement space is a first arrangement space,
The heart-lung machine has a second arrangement space formed between the first side wall portion and the second side wall portion, in which the drive unit is arranged. 25. The heart-lung machine of claim 24,
a first guide surface having a shape corresponding to a shape of an outer surface of the drive unit body is formed on an inner surface of the first side wall portion;
an inner surface of the second side wall portion is formed with a second guide surface having a shape corresponding to a shape of an outer surface of the drive unit body; 26. The heart-lung machine of claim 25,
the extension unit has a pressing member that presses the drive unit toward the second side wall portion when the drive unit is disposed in the second arrangement space,
The pressing member is disposed in an accommodation hole formed in the first guide surface so as to be movable in the longitudinal direction of the bottom wall portion. 27. The heart-lung machine of claim 26,
The pressing member is provided with a pressing protrusion protruding toward the second side wall portion,
The drive unit has a hole into which the pressing protrusion is inserted. 28. The heart-lung machine of claim 27,
The pressing protrusion is tapered in a protruding direction,
The hole has a tapered diameter from an opening of the hole toward a bottom surface of the hole. An artificial heart-lung device comprising: a pump unit having a pump for circulating blood through an artificial lung; and a drive unit having a drive section for driving the pump and to which the pump unit is detachably formed,
The drive unit includes:
a drive unit body having an arrangement space for arranging the pump unit and an insertion port for inserting the pump unit into the arrangement space;
an opening/closing section provided in the drive unit body for opening and closing at least a portion of the insertion opening,
The opening/closing section places the pump unit in the placement space and restricts movement of the pump unit from the insertion opening to the outside while closing at least a portion of the insertion opening.

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