WO2010023915A1

WO2010023915A1 - Transfusion apparatus

Info

Publication number: WO2010023915A1
Application number: PCT/JP2009/004159
Authority: WO
Inventors: 竹林正明; 内藤雅之; 佐々木太; 前原一夫
Original assignee: 株式会社ジェイ・エム・エス
Priority date: 2008-08-29
Filing date: 2009-08-27
Publication date: 2010-03-04
Also published as: CN102137690B; KR20110059612A; CN102137690A; JP5347384B2; KR101652542B1; JP2010051721A

Abstract

A transfusion apparatus (1) comprises a control unit (12), an upper tube clamp (5), and an abnormality detection unit (9). The control unit (12) checks if any abnormality has occurred during a transfusion on the basis of a signal outputted from the abnormality detection unit (9), and when the control unit (12) determines that an abnormality has occurred, the control unit (12) controls the upper tube clamp (5) to come into a clamped state from an unclamped state.

Description

Infusion device

The present invention relates to an infusion device used when a drug solution or the like is administered to a patient.

Conventionally, in the medical field, an infusion device has been used in order to perform an infusion treatment for a patient (for example, see Patent Document 1). The infusion device of Patent Literature 1 includes a case portion in which a part of a tube extending from an infusion container is accommodated and set. Apart from this case part, a tube clamp part for clamping the tube is used together.

The case part includes a main body part and a door supported by the main body part so as to be opened and closed. When the door of the case part is opened, the tube clamp part operates to clamp the tube. Therefore, when a medical worker such as a doctor or a nurse opens the door, the flow of the chemical solution or the like in the tube can be stopped by the tube clamp portion.

JP 2007-222485 A

By the way, since the tube clamp part of patent document 1 comes to operate | move when a door opens, even if the infusion number of the chemical | medical solution in an infusion device increases more than regulation, for example, it is medical. Until the worker opens the door, there is a risk that the patient will continue to receive an unspecified amount of the drug solution.

The present invention has been made in view of such points, and the purpose of the present invention is to automatically stop the flow of liquid in the tube when an abnormality occurs in the infusion device. The purpose is to improve the safety of infusion therapy.

In order to achieve the above object, according to the first invention, an infusion device configured to administer a liquid in an infusion container to a patient, comprising: an abnormality detection unit for detecting an abnormality in the infusion; and the tube A tube clamp unit that clamps and stops the flow of liquid in the tube, the abnormality detection unit, and the tube clamp unit are connected to the tube clamp unit based on a signal output from the abnormality detection unit. A controller for controlling the tube clamp.When the controller determines whether an abnormality has occurred during the infusion based on a signal output from the abnormality detector, and determines that an abnormality has occurred, the tube clamp It was set as the structure comprised so that a part might be switched from an unclamped state to a clamped state.

According to this configuration, when an abnormality occurs during the infusion, the control unit puts the tube clamp part in a clamped state, so that a medical worker does not act such as opening the door as in the conventional example, Liquid flow stops.

According to a second invention, in the first invention, the tube clamp portion includes a tube pressing portion and a tube receiving portion which are arranged to face each other so as to sandwich the tube in the radial direction, and the tube pressing portion is connected to the tube receiving portion. An urging portion for urging in a direction approaching the portion, a driving device for moving the tube pressing portion in a direction away from the tube receiving portion against the urging force by the urging portion, and driving of the driving device A driving force transmission unit that transmits force to the tube pressing unit, the driving device is connected to a control unit, and the control unit detects an abnormality during infusion based on a signal output from the abnormality detection unit. The drive device is configured to control the drive device so as to move the tube pressing portion in a direction away from the tube receiving portion when it is determined that it has not occurred. In a state where the cube pressing portion is urged in a direction approaching to the tube receiving portion by the biasing unit, and assumed to be configured to be separable from the tube press portion.

According to this configuration, when an abnormality occurs, the tube is clamped by the tube pressing portion and the tube receiving portion by the urging force of the urging portion, and the liquid flow in the tube stops. Further, when no abnormality has occurred, the tube is brought into an unclamped state by moving the tube pressing portion in a direction away from the tube receiving portion by the driving device.

And since the tube pressing part is separable from the driving force transmitting part, when the tube is in a clamped state, the tube pressing part is driven in the event that the power of the infusion device is cut off or the driving device fails It is possible to operate the medical staff separately from the force transmission unit.

According to a third invention, in the second invention, an alarm device connected to the control unit, and an operation unit connected to the control unit and operated by an operator, the control unit has an abnormality during infusion. The above-mentioned alarm device is controlled to generate an alarm when it is determined that the alarm has occurred, and the tube clamp unit is controlled to be in an unclamped state when the operation unit is operated so as to release the alarm. It was supposed to be.

According to this configuration, the tube is not opened unless the operator operates the operation unit to cancel the alarm. That is, the operator confirms the alarm and opens the tube.

According to a fourth invention, in the second or third invention, a case portion that is set in a state in which a part of the tube is accommodated is provided, and the case portion can be opened and closed to the main body case portion and the main body case portion. And a door pressing portion, and a tube pressing portion and a tube receiving portion are provided in the main body case portion.

According to this configuration, since the tube pressing portion and the tube receiving portion are provided on the main body case portion side, the clamped state is maintained even when the door portion of the case portion is opened when the tube is in the clamped state. It becomes possible.

In the fifth invention, in any one of the second to fourth inventions, the urging portion is a coil spring and the driving device is a motor.

According to this configuration, since the force for clamping the tube is obtained by the coil spring that is less likely to break down, the tube can be reliably clamped when necessary. On the other hand, the convenience of the operator is improved by placing the tube in an unclamped state by the motor.

According to a sixth invention, in any one of the second to fifth inventions, the driving device and the driving force transmitting portion are connected via a bevel gear, and the driving device is configured to rotate, and a tube clamp. The unit is configured to convert the rotational motion by the driving device into a straight motion.

According to this configuration, the degree of freedom of layout of the driving force transmission unit with respect to the driving device is increased.

In the seventh invention, in any one of the second to sixth inventions, the tube pressing portion has a portion operated by an operator, and the portion is curved.

According to this configuration, when a medical worker manually operates the tube pressing portion, the pressure applied to the finger is dispersed and the operation burden is reduced.

According to the first invention, when the control unit determines that an abnormality has occurred during the infusion based on the signal from the abnormality detection unit, the tube clamp unit is put into a clamped state. Therefore, the flow of the liquid in the tube can be automatically stopped, and the safety of the infusion treatment can be improved.

According to the second invention, when an abnormality occurs, the tube can be clamped by the tube pressing portion and the tube receiving portion by the urging portion of the tube clamp portion. It can be in a clamped state. And in the clamped state, in the unlikely event that the power of the infusion device is cut off or the drive device fails, the tube pressing part is separated from the driving force transmitting part and the medical worker moves himself to open the tube Can respond quickly to subsequent infusion treatments.

According to the third invention, since the tube is opened when the operator releases the alarm by the operation unit, the operator always confirms the alarm before opening the tube, so that the safety of the infusion treatment is ensured. Can be improved.

According to the fourth invention, since the tube pressing portion and the tube receiving portion are provided on the main body case portion side, the tube is clamped even if the door portion of the case portion is opened when the tube is in a clamped state. Can continue to improve the safety of infusion therapy.

According to the fifth invention, the tube clamping force is obtained by the coil spring, while the tube can be brought into an unclamped state by the motor force, so that the convenience of the operator is improved while ensuring the safety of the infusion treatment. be able to.

According to the sixth aspect of the invention, the degree of freedom in layout between the driving device and the driving force transmission unit can be improved.

According to the seventh invention, since the portion operated by the operator in the tube pressing portion is curved, the operability when operating the tube pressing portion by hand can be improved.

It is a front view of an infusion device. It is a perspective view of the state where the case part of the infusion device was opened. It is a perspective view of a tube clamp part. It is a top view of the tube clamp part at the normal time It is a top view at the time of clamping a tube with a tube clamp part. It is a front view at the time of a tube press part separating from a driving force transmission part. It is a block diagram of an infusion device.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

1 and 2 show an infusion device 1 of the present invention. The infusion device 1 includes a case unit 2 and a drop detector (abnormality detection unit) 9. As shown in FIG. 2, the case portion 2 includes a pump portion 4, an upper tube clamp portion 5, a bubble detection sensor portion 6, a lower tube clamp portion 8, and a control portion 12 (only in FIG. 7). Description). An operation unit 10 and a color liquid crystal panel 11 are provided on the front surface of the case unit 2.

The infusion device 1 is disposed at an intermediate portion between the drip chamber 32 and the clamp 34 in a tube 33 extending from the infusion container 31 to the patient via the drip chamber 32 and the clamp 34. The tube 33 is set in the case part 2 in a posture extending in the vertical direction.
Then, while confirming the setting contents on the color liquid crystal panel 11, the operation unit 10 of the infusion device 1 is operated to set the flow rate and the like of the drug solution L to be administered to the patient. In addition, the pump action of the pump unit 4 is added, so that the drug solution (liquid) L stored in the infusion container 31 can be administered to the patient via the drip chamber 32.

In the following description, for convenience of explanation, unless otherwise indicated, “left” and “right” mean the left side and the right side of the infusion device 1 in use as shown in each figure, respectively. "And" rear "mean the front side and the rear side of the infusion device 1 in use as shown in the figure, and" upper "and" lower "means the infusion device 1 in use as shown in the figure Means the upper side and the lower side of each.

As shown in FIG. 2, the case portion 2 includes a main body case portion 21, a door portion 22, and a door hinge 23. The door hinge 22 can be opened and closed.

As shown in FIG. 1 and FIG. 2, the case portion 2 has a substantially rectangular parallelepiped shape. The operation unit 10 is provided on the front surface portion 22 b of the door portion 22. The operation unit 10 is provided with operation buttons for operating the infusion device 1, operation buttons for setting conditions for infusion, and the like. The operation unit 10 is connected to the control unit 12. Operation signals of various operation buttons of the operation unit 10 are input to the control unit 12.

The color liquid crystal panel 11 is disposed above the operation unit 10. The color liquid crystal panel 11 displays the operating state of the infusion device 1 and various setting information. The color liquid crystal panel 11 is connected to and controlled by the control unit 12.

As shown in FIG. 2, the pump part 4 is provided in the center of the door part facing surface 21 a in the main body case part 21. The pump portion 4 is formed with a ridge portion 41 that protrudes forward and extends along the periphery of the pump portion 4. Cutout portions 41 a are formed at both upper and lower end portions of the protruding portion 41. The tube 33 is fitted into the cutout portion 41a positioned above and below.

A plurality of fingers 42 extending in the left-right direction are provided inside the ridge portion 41 in a line in the vertical direction. The fingers 42 are moved back and forth in order from the upper finger 42 to the lower finger 42 by a cam and a cam drive mechanism (not shown) provided inside the main body case portion 21. . The pump unit 4 is also connected to the control unit 12.

A tube pressing portion 43 is provided at a position facing the pump portion 4 on the main body case portion facing surface 22 a of the door portion 22. When the door portion 22 is closed, the tube 33 is sandwiched between the tube pressing portion 43 and the finger 42 in the radial direction. Then, by moving the finger 42 back and forth as described above, the tube 33 is appropriately crushed in order from top to bottom. Thereby, the chemical | medical solution L can be administered to a patient.

2, an upper tube clamp portion 5 is provided on the upper side of the pump portion 4. As shown in FIGS. 3 to 6, the upper tube clamp portion 5 includes a clamp plate 50, a motor 51, a driving force transmission portion 52, a movable portion 53, a fixed portion 56, a limit switch 57, and a coil spring B. And.

The clamp plate 50 includes a first plate portion 50a, a second plate portion 50b, a first attachment plate portion 50c, and a second attachment plate portion 50d.

The first plate portion 50a has a substantially rectangular shape extending in the front-rear direction. The 2nd plate part 50b is provided in the front end right part of the 1st plate part 50a. The first attachment plate portion 50c is provided on the left end portion of the front end of the first plate portion 50a. As shown in FIG. 4, a through hole H1 is formed in the approximate center of the first mounting plate portion 50c. A screw (not shown) is inserted into the through hole H1 from behind and screwed into the case part 2 so that the left side of the clamp plate 50 is fixed to the case part 2.

Further, the second mounting plate portion 50d is provided at the front end of the second plate portion 50b. A through hole H2 is formed substantially at the center of the second attachment plate portion 50d. The right side of the clamp plate 50 is fixed to the case part 2 by inserting a screw (not shown) into the through hole H2 from behind and screwing it into the case part 2.

As shown in FIG. 3, a shaft support portion 50e is attached to the rear side of the first plate portion 50a. The shaft support portion 50e is formed in a U shape. The shaft support portion 50e is fastened to the first plate portion 50a by screws S4 and S5. A through hole H3 and a through hole H4 penetrating in the front-rear direction are concentrically provided in the shaft support portion 50e. Bush B1 and bush B2 are fitted into the through hole H3 and the through hole H4.

The motor 51 is attached to the shaft support 50e via a motor attachment plate 50f. The motor attachment plate 50f is disposed substantially parallel to the first plate portion 50a and is fastened to the shaft support portion 50e by four screws S.

The motor 51 is fixed to the motor mounting plate 50f in such a posture that its rotating shaft is orthogonal to the direction in which the motor mounting plate 50f extends. Therefore, the rotating shaft of the motor 51 extends in the vertical direction of the infusion device 1. The rotation shaft of the motor 51 passes through the vicinity of the center portion of the motor mounting plate 50f and protrudes inward of the shaft support portion 50e. A motor-side bevel gear 51 a is attached to the tip of the rotating shaft of the motor 51. The motor 51 is connected to the control unit 12.

The driving force transmission unit 52 includes a shaft 52a, a shaft side bevel gear 52b, a thrust bearing 52c, a male screw portion 52d, and a driving rod 52e.

The shaft 52a is disposed so as to extend in the front-rear direction so as to be orthogonal to the rotation axis of the motor 51, and is rotatably supported while being inserted through the bush B1 and the bush B2. A shaft side bevel gear 52b is fixed between the bush B1 and the bush B2 of the shaft 52a. The shaft side bevel gear 52b is positioned so as to mesh with the teeth of the motor side bevel gear 51a. Thereby, when the rotating shaft of the motor 51 rotates, the shaft 52a rotates.

Since the rotational force of the motor 51 is transmitted to the shaft 52a via the motor side bevel gear 51a and the shaft side bevel gear 52b, the rotation shaft of the motor 51 and the shaft 52a need not be arranged in parallel. The degree of freedom in layout between the shaft 51a and the shaft 51a is improved.

In front of the bush B1 of the shaft 52a, there is provided a male screw portion 52d having a screw thread on the outer peripheral surface. The thrust bearing 52c is interposed between the bush B1 and the male screw portion 52d.

The drive rod 52e is disposed in front of the thrust bearing 52c. The drive rod 52e is formed in a prismatic shape extending in the same direction as the shaft 52a. A protrusion 52g and a protrusion 52h are formed near the center of the drive rod 52e. The protrusion 52g and the protrusion 52h and the side surface of the drive rod 52e are in contact with the first plate portion 50a, so that the drive rod 52e does not rotate around its central axis. In addition, the front end surface of the drive rod 52e is formed of a curved surface whose center in the left-right direction is gently curved toward the front.

Inside the drive rod 52e, a female screw hole (not shown) that opens to the rear end and extends forward is formed. The male screw portion 52d of the shaft 52a is screwed into the female screw hole. When the male screw portion 52d rotates, the drive rod 52e, which is stopped as described above, moves in the central axis direction (front-rear direction). That is, the upper tube clamp portion 5 is configured such that the rotational motion of the motor 51 is converted into a straight motion.

The movable portion 53 includes a movable portion main body 54 and a tube pressing portion 55. The movable portion main body 54 includes a connecting portion 54a protruding forward, a driving force receiving portion 54b protruding leftward, a plate-like urging force receiving portion 54c extending to the rear right side, and an overrun preventing portion 54d. Yes.

The connecting portion 54 a is connected to the rear end portion of the tube pressing portion 55. A driving force transmission plate 54e is formed in the driving force receiving portion 54b. The driving force transmission plate 54e is in contact with the front end surface of the driving rod 52e. The driving force transmission plate 54e is not fixed to the driving rod 52e and is configured to be detachable from the driving rod 52e.

A through hole H5 is provided in the urging force receiving portion 54c. One end of the coil spring B is caught in the through hole H5.

The overrun prevention portion 54d is formed in the biasing force receiving portion 54c. The overrun prevention portion 54d is formed with a female screw hole 54f penetrating left and right. A switch operating screw 54g is screwed into the female screw hole 54f. The switch operating screw 54g protrudes to the left from the overrun prevention portion 54d when screwed into the female screw hole 54f.

A through hole (not shown) penetrating in the thickness direction of the first plate portion 50a is provided in the approximate center of the movable portion main body 54. A screw S1 is inserted through the through hole. The screw S1 is screwed into the first plate portion 50a, and the movable portion main body 54 rotates around the screw S. The distance from the screw S1 to the through hole H5 is configured to be 30 mm to 40 mm.

The tube pressing portion 55 includes a pressing portion main body 55a and a tip portion 55b. The pressing portion main body 55a is formed in a plate shape extending in the front-rear direction. The rear end of the pressing portion main body 55 a is connected to the connecting portion 54 a of the movable portion main body 54. The pressing portion main body 55a is thinner than the connecting portion 54a.

Further, the tip portion 55b is provided at the front end of the pressing portion main body 55a. The front end surface of the distal end portion 55b is a curved surface that curves toward the front side. The distal end portion 55b is formed thicker than the pressing portion main body 55a. Moreover, the left-right width of the front-end | tip part 55b is formed wider than the width | variety of the press part main body 55a. The distance from the tip 55b of the tube pressing portion 55 to the screw S1 is configured to be 30 mm to 40 mm.

As shown in FIG. 3, a boss-shaped screwed portion 50g is formed on the right front side of the first plate portion 50a so as to protrude from the first plate portion 50a. A screw S2 is screwed into the screw screw portion 50g. The other end portion of the coil spring B is fixed to the first plate portion 50a by the screw S2. The coil spring B is a tension spring and has a spring constant set in a range of 0.1 to 0.15 kgf / mm.

The fixing portion 56 is attached to the front end of the first plate portion 50a. The fixing portion 56 includes a right protruding portion 56a, a tube receiving portion 56b, an insertion portion 56c through which the tube pressing portion 55 is inserted, a right attachment portion 56d, and a left attachment portion 56e.

The right side protruding portion 56a and the tube receiving portion 56b protrude forward from the front end of the first plate portion 50a, and are arranged at intervals in the left-right direction. The insertion part 56c is provided between the right side protruding part 56a and the tube receiving part 56b. The insertion portion 56c is formed with a through hole (not shown) penetrating in the front-rear direction. The pressing portion main body 55a of the tube pressing portion 55 is inserted into the through hole (not shown). When the movable portion main body 54 is rotated, the pressing portion main body 55a can move to the left and right between the right protruding portion 56a and the tube receiving portion 56b in the fixed portion 56.

The right attachment portion 56d and the left attachment portion 56e protrude rearward and are fastened to the first plate portion 50a by screws S3.

That is, the movable portion main body 54 is urged by the coil spring B in the direction in which the tube pressing portion 55 approaches the tube receiving portion 56 b of the fixed portion 56. At this time, as shown in FIG. 5, when the drive rod 52e is retracted, the upper tube clamp portion 5 is clamped by the urging force of the coil spring B, and the tube 33 is moved between the tube pressing portion 55 and the tube receiving portion 56b. It is sandwiched in the radial direction and closed. The biasing force of the coil spring B is a force sufficient to close the tube 33.

On the other hand, as shown in FIG. 4, when the male screw portion 52d is rotated by the motor 51 so that the drive rod 52e of the upper tube clamp portion 5 moves forward, the tube pressing portion is resisted against the biasing force of the coil spring B. The movable portion main body 54 is rotated so that 55 is separated from the tube receiving portion 56b of the fixed portion 56, and the upper tube clamp portion 5 is switched from the clamped state to the unclamped state.

Further, when the motor 51 is rotated in the reverse direction so that the drive rod 52e moves backward, the tube clamp portion 5 is switched from the unclamped state to the clamped state as described above.

The limit switch 57 is disposed behind the movable part main body 54 and between the overrun prevention part 54d and the drive rod 52e. The limit switch 57 includes a right switch portion 57a and a left switch portion 57b, and can be switched ON and OFF independently. The limit switch 57 is connected to the control unit 12.

As shown in FIG. 4, a plate switch 57c is provided on the right side surface of the right switch portion 57a. When the movable portion 53 rotates around the screw S1, the tip of the switch operation screw 54g of the overrun prevention portion 54d comes into contact with the plate switch 57c. The right switch portion 57a can be switched on and off by the contact of the switch operation screw 54g.

A convex switch 57d is provided on the left side surface of the left switch portion 57b so as to protrude leftward. When the drive rod 52e slides backward, the protrusion 52g of the drive rod 52e comes into contact with the convex switch 57d. The left switch portion 57b can be turned on and off by the contact of the protruding portion 52g. The limit switch 57 is connected to the control unit 12.

Further, as shown in FIG. 2, a tube clamp interference avoiding portion 58 is provided on the body case portion facing surface 22 a of the door portion 22 at a position facing the upper tube clamp portion 5. The tube clamp interference avoiding portion 58 is recessed so that the main body case portion facing surface 22a does not interfere with the upper tube clamp portion 5 when the door portion 22 is closed.

The bubble detection sensor unit 6 is provided above the upper tube clamp unit 5 of the main body case unit 21. The bubble detection sensor unit 6 includes a main body side bubble detection sensor unit 61 provided on the door portion facing surface 21a of the main body case portion 21 and a door side bubble detection sensor portion provided on the main body case portion facing surface 22a of the door portion 22. 62.

The main body side bubble detection sensor unit 61 includes a main body side sensor 61a. The door-side bubble detection sensor unit 62 includes a door-side sensor 62a. The main body side sensor 61a and the door side sensor 62a are ultrasonic sensors. When the door portion 22 is closed, the main body side sensor 61 a and the door side sensor 62 a sandwich the tube 33 and transmit the ultrasonic wave to the tube 33. At this time, if bubbles are mixed in the chemical liquid L passing through the tube 33, since the ultrasonic transmittance is different between the chemical liquid L and the bubbles, the change in the transmittance is detected, so that the bubbles in the chemical liquid L are detected. The presence of can be detected.

A lower tube clamp portion 8 is provided below the pump portion 4 of the main body case portion 21. The lower tube clamp portion 8 includes a tube receiving portion 89 and a tube pressing portion 82 that are arranged to face each other. The tube pressing portion 82 protrudes from the front surface of the main body case portion 21. The tube receiving portion 89 projects forward from an opening 81 formed on the front surface of the main body case portion 21. The tube pressing portion 82 is moved in a direction in which the tube pressing portion 82 contacts and separates from the tube receiving portion 89 and is urged in a direction approaching the tube receiving portion 89 by an urging member (not shown). The tube 33 is clamped by the tube receiving portion 89 and the tube pressing portion 82 by the urging force of the urging member.

The tube receiving portion 89 is provided with an engaging recess 89a. Further, a protrusion 82 d that protrudes toward the tube receiving portion 89 is provided at the tip of the tube pressing portion 82. The vertical width of the engagement recess 89a is formed wider than the vertical width of the tip of the projection 82d of the tube pressing portion 82, and the tube pressing portion 82 has moved in a direction approaching the tube receiving portion 89. Sometimes, the tip of the projection 82d enters the engagement recess 89a.

Furthermore, a clamp release lever 85 is provided on the right side of the tube receiving portion 89 of the main body case portion 21. When the clamp release lever 85 is rotated, the tube pressing portion 82 can be separated from the tube receiving portion 89 to be in an unclamped state.

Further, the door portion 22 is provided with a concave tube clamp interference avoiding portion 8a at a position facing the lower tube clamp portion 8 on the main body case facing surface 22a. The tube clamp interference avoiding portion 8a is formed with a clamp release protrusion 8b that abuts the tube pressing portion 82 of the lower tube clamp portion 8 when the door portion 22 is closed. When the door portion 22 is closed, the clamp release protrusion 8b comes into contact with the tube pressing portion 82, whereby the clamp release protrusion 8b moves the tube pressing portion 82 away from the tube receiving portion 89 to be in an unclamped state. The

Further, when the door portion 22 is opened, the clamp release protrusion 8b does not come into contact with the tube pressing portion 82, whereby the tube pressing portion 82 moves in a direction approaching the tube receiving portion 89 to be in a clamped state.

As shown in FIG. 2, the drop detector 9 has a substantially rectangular parallelepiped shape. A drip chamber holding portion 91 having a shape penetrating in the vertical direction is formed at the center of the drop detector 9 so as to sandwich the drip chamber 32. The drop detector 9 includes a light emitting element and a light receiving element that are arranged so as to sandwich the drip chamber 32. The light emitted from the light emitting element toward the light receiving element is blocked by the drop falling in the drip chamber 32, and the drop can be detected by the change in the amount of light received at this time. The drop detector 9 is connected to the control unit 12.

The case unit 2 is provided with an alarm device 7 (shown in FIG. 7). The alarm device 7 includes a speaker that emits sound and is connected to the control unit 12.

Next, the control unit 12 of the infusion device 1 will be described. The control unit 12 counts the number of drops within a predetermined time based on the signal output from the drop detector 9. The control unit 12 detects whether or not the number of drops within a predetermined time is greater than or equal to a predetermined value. It is comprised so that it may determine.

On the other hand, if the control unit 12 detects that bubbles are mixed in the chemical liquid L in the tube 33 based on the signal output from the bubble detection sensor unit 6, the control unit 12 determines that the bubbles are abnormal. If it is not mixed, it is determined to be normal.

And when it determines with it being abnormal, the control part 12 will command the upper tube clamp part 5 to switch from an unclamped state to a clamped state. That is, when the upper tube clamp unit 5 receives a command from the control unit 12, the upper tube clamp unit 5 rotates the motor 51 so that the tube pressing unit 55 and the tube receiving unit 56b are in a clamped state. At this time, as shown in FIG. 5, the drive rod 52e moves backward. When the protrusion 52g of the drive rod 52e contacts the convex switch 57d of the limit switch 57, the control unit 12 detects this and stops the motor 51.

Also, the control unit 12 causes the alarm device 7 to generate an alarm sound substantially simultaneously with the upper tube clamp unit 5 being in the clamped state.

Also, when the pump unit 4 is operating, the pump unit 4 is stopped by giving a command to the pump unit 4 almost simultaneously with the upper tube clamp unit 5 being in the clamped state. Further, a command is also issued to the color liquid crystal panel 11 to display that an abnormality has occurred in the color liquid crystal panel 11.

When the alarm is released by operating the operation button of the operation unit 10, the control unit 12 instructs the upper tube clamp unit 5 to be in an unclamped state. That is, when the upper tube clamp unit 5 receives a command from the control unit 12, the upper tube clamp unit 5 rotates the motor 51 so that the tube pressing unit 55 and the tube receiving unit 56b are in an unclamped state. At this time, the drive rod 52e moves forward in the opposite direction. As shown in FIG. 6, when the switch operating screw 54 g of the movable portion main body 54 comes into contact with the plate switch 57 c of the limit switch 57, the control unit 12 detects this and stops the motor 51. Thereafter, the control unit 12 operates the pump unit 4.

Next, the case where the infusion device 1 is used will be described. First, an infusion container 31, a drip chamber 32, a tube 33, and a clamp 34 are prepared. The clamp 34 is closed. The door part 22 of the case part 2 in the infusion device 1 is opened, and the tube 33 is set in the main body case part 21. At this time, the clamp release lever 85 is operated to bring the lower tube clamp portion 8 into an unclamped state. Moreover, the upper tube clamp part 5 is made into the unclamped state.

In this state, a part of the tube 33 is passed through the front surface of the main body side sensor 61a in the bubble detection sensor unit 6 and passed between the tube receiving unit 56b and the tube pressing unit 55 in the upper tube clamp unit 5. Further, the tube 33 is fitted into the notch 41 a of the pump unit 4 and is passed between the tube pressing part 82 and the tube receiving part 89 in the lower tube clamp part 8.

After setting the tube 33 in this way, the door 22 is closed and the clamp 34 is opened. Further, the drip chamber 32 is set in the drip chamber holding portion 91 in the drop detector 9.

Next, the medical worker operates the operation unit 10 to turn on the infusion device 1. When the control unit 12 of the infusion device 1 starts up, the operation unit 10 is operated while looking at the color liquid crystal panel 11 to set the flow rate of the drug solution L to be administered to the patient, and the administration of the drug solution L to the patient is started. Until the abnormality occurs, the upper tube clamp portion 5 is not clamped.

If the control unit 12 determines that the dropping state is abnormal based on the signal output from the drop detector 9 after the start of the administration of the drug solution L, the pump unit 4 stops and the alarm unit 7 gives an alarm. And a warning or the like is displayed on the color liquid crystal panel 11. Thereby, it is informed that an abnormality has occurred in the surrounding people.

At this time, the control unit 12 instructs the upper tube clamp unit 5 to switch from the unclamped state to the clamped state, so that the tube 33 is blocked and the flow of the chemical solution L is stopped. Thereby, it is prevented in advance that the drug solution L is continuously administered in an abnormal state.

If it is determined that there is an abnormality based on the signal output from the bubble detection sensor unit 6, similarly, the pump unit 4 stops, an alarm is issued by the alarm device 7, and a warning is given to the color liquid crystal panel 11. Are displayed, and the upper tube clamp 5 is switched to the clamped state.

When the upper tube clamp 5 is in the clamped state, if the infusion device 1 is turned off or the motor 51 fails, the tube pressing portion 55 is pushed in the direction of arrow A shown in FIG. . Then, as shown in FIG. 6, the movable portion main body 54 rotates in a direction in which the driving force transmission plate 54e of the movable portion main body 54 is separated from the front end of the drive rod 52e. Thereby, the tube pressing part 55 leaves | separates from the tube receiving part 56b of the fixing | fixed part 56, and the upper side tube clamp part 5 switches to an unclamped state.

At this time, the medical worker manually operates the distal end portion 55b of the tube pressing portion 55. Since the tip portion 55b is formed of a curved surface, the force applied to the finger is dispersed. Further, since the spring constant of the coil spring B is set in the range of 1.5 kgf to 2.5 kgf, the tube 33 can be easily opened by manual operation.

When the alarm is canceled by the operation button of the operation unit 10 after dealing with the abnormality, the control unit 12 instructs the upper tube clamp unit 5 to be in the unclamped state, so that the tube 33 is opened. Thereafter, the pump unit 4 is actuated to resume the administration of the drug solution L.

As described above, according to the infusion device 1 according to this embodiment, if the control unit 12 determines that there is an abnormality during the infusion, the upper tube clamp unit 5 is put into a clamped state, so that the safety of the infusion treatment is improved. Can do.

Further, since the tube pressing portion 55 is configured to be separated from the driving force transmitting portion 52, when the upper tube clamp portion 5 is in a clamped state, the infusion device 1 may be turned off or the motor 51 may be turned off. Even if the tube breaks down, the tube pressing portion 55 can be moved manually to open the tube 33 manually. Thereby, the medical staff can perform subsequent infusion treatment rapidly.

In addition, since the tube 33 is opened by performing an operation to release the alarm with the operation unit 10, the medical staff always confirms the alarm before opening the tube 33, thereby improving the safety of infusion treatment. be able to.

Moreover, since the tube clamp portion 8 is provided on the main body case portion 21 side, the tube 33 can be clamped by the tube clamp portion 8 even when the door portion 22 of the case portion 2 is open, thereby improving the safety of infusion treatment. be able to.

Further, since the driving force transmission unit 52 is laid out so that the moving direction of the driving force transmission unit 52 intersects the rotation axis direction of the motor 51, the degree of freedom in layout between the motor 51 and the driving force transmission unit 52 can be improved. .

Further, since the curved surface is formed at the distal end portion 55b of the tube pressing portion 55, the burden on the finger can be reduced when the tube 33 is manually opened, and the operability can be improved.

In the above embodiment, it is determined whether or not an abnormality has occurred during the infusion based on the signals output from the bubble detection sensor unit 6 and the drop detector 9. However, the present invention is not limited to this. You may make it determine whether abnormality generate | occur | produced during infusion using another sensor.

As described above, the infusion device according to the present invention is suitable for administering a medicinal solution to a patient at a medical site, for example.

DESCRIPTION OF SYMBOLS 1 Infusion apparatus 10 Operation part 2 Case part 21 Main body case part 22 Door part 31 Infusion container 33 Tube 4 Pump part 5 Upper tube clamp part 51 Motor (drive device)
51a Motor side bevel gear 52 Driving force transmission part 52b Shaft side bevel gear 52d Male thread part 55 Tube pressing part 56b Tube receiving part 6 Bubble detection sensor part 7 Alarm 9 Drop drop detector (abnormality detection part)
12 Control part L Liquid B Coil spring (biasing part)

Claims

An infusion device configured to administer a liquid in an infusion container to a patient,
An anomaly detector that detects anomalies in the infusion;
A tube clamp for clamping the tube and stopping the flow of liquid in the tube;
A controller that is connected to the abnormality detection unit and the tube clamp unit and controls the tube clamp unit based on a signal output from the abnormality detection unit;
The controller determines whether or not an abnormality has occurred during the infusion based on a signal output from the abnormality detector, and determines that an abnormality has occurred. An infusion device characterized by being configured to switch to
The infusion device according to claim 1,
Tube clamp is
A tube pressing portion and a tube receiving portion arranged to face each other so as to sandwich the tube in the radial direction;
An urging portion for urging the tube pressing portion in a direction approaching the tube receiving portion;
A driving device for moving the tube pressing portion in a direction away from the tube receiving portion against the urging force of the urging portion;
A driving force transmitting portion for transmitting the driving force of the driving device to the tube pressing portion;
The driving device is connected to a control unit,
The controller drives the drive so as to move the tube pressing portion away from the tube receiving portion when it is determined that no abnormality has occurred during the infusion based on a signal output from the abnormality detecting portion. Configured to control the device,
The driving force transmission unit is configured to be separable from the tube pressing unit in a state where the tube pressing unit is urged by the urging unit in a direction approaching the tube receiving unit. Infusion device.
The infusion device according to claim 2,
An alarm connected to the control unit;
An operation unit connected to the control unit and operated by an operator;
The control unit controls the alarm so as to generate an alarm when it is determined that an abnormality has occurred during the infusion, and enters an unclamped state when the operation unit is operated to cancel the alarm. An infusion device configured to control the tube clamp portion.
In the infusion device according to claim 2 or 3,
A case part that is set in a state where a part of the tube is accommodated,
The case portion includes a main body case portion and a door portion that is attached to the main body case portion so as to be opened and closed.
An infusion device, wherein a tube pressing portion and a tube receiving portion are provided in the main body case portion.
The infusion device according to any one of claims 2 to 4,
The biasing part is a coil spring,
An infusion device, wherein the driving device is a motor.
The infusion device according to any one of claims 2 to 5,
The driving device and the driving force transmission unit are connected via a bevel gear,
The drive device is configured for rotational movement;
An infusion device characterized in that the tube clamp part is configured to convert a rotational motion by the driving device into a straight motion.
The infusion device according to any one of claims 2 to 6,
The tube pressing portion has a portion operated by an operator, and the portion is curved and formed.