JPH11332983A - Transfusion pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure the easiness of mounting a tube to a groove, to secure a sealing property by a sealing finger and to improve the transportation accuracy of fluid. SOLUTION: This transfusion pump is provided with a recessed groove 7 formed on the surface of a main body case, and a part of a tube 2 connected to a container is mounted on the recessed groove 7. The width of the recessed groove 7 is set to a size for allowing the meandering of the tube 2 mounted on the recessed groove 7 and a plurality of fingers 9A-9G arranged on the recessed groove 7 are moved back and forth in the depth direction of the recessed groove 7 so as to compress the tube 2. Two sealing fingers 9A and 9F among them are for transporting fluid of the container through the tube 2 by crushing the tube 2 mounted to the recessed groove 7 by the sealing fingers 9A and 9F between a door case and partially sealing the flow passage of the tube 2. The width of the sealing fingers 9A and 9F is set larger than the width of the recessed groove 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an infusion pump used for, for example, a medical infusion device and the like, for transporting a liquid contained in a container through a tube.

[0002]

2. Description of the Related Art Conventionally, for example, in a medical infusion device, a finger-driven infusion pump has been used to transport a drug solution contained in a container such as a drug solution bag to a human body via a tube. You.

[0003] As shown in FIG.
1 includes a main body case 42 and a door case 44 that is opened and closed with respect to a surface 43 thereof. As shown in FIG. 9, the main body case 42 includes a concave groove 45 extending along the center of the surface 43, and a plurality of fingers 46 provided in the concave groove 45. Each finger 46 reciprocates sequentially in the depth direction of the concave groove 45. Door case 44
Has finger plates 47 provided corresponding to the respective fingers 46. Each finger 46 presses the tube 48 between the finger 46 and the finger plate 47. At least one of the fingers 46 crushes the tube 48 flatly with the finger plate 47 to completely block the flow path of the chemical solution, that is, to seal the flow path. Thus, tube 4
It is indispensable to completely seal 8 in order to ensure the transport accuracy of the liquid medicine in the infusion pump 41. To ensure smooth movement of each finger 46,
The inner wall (finger guide) 49 of the concave groove 45 and the finger 46
There is a slight clearance between them.

In order to use the transport pump 41,
As shown in FIGS. 8 and 9, a part of the tube 48 connected to the drug solution bag is fitted along the concave groove 45, and the tube 48 is closed by the door case 44 from above. As a result, the tube 48 is held between the cases 42 and 44. In this state, by driving each finger 46, the tube 48 is sequentially rubbed down and compressed along the length direction of the concave groove 45. As a result, the drug solution in the drug solution bag is transported to the human body or the like through the tube 48.

[0005]

However, the tube 48 actually used in the medical field is usually sterilized, wound in a loop, and stored in a bag. For this reason, when trying to use a new tube 48, as shown in FIG. 9, the tube 48 may meander in the concave groove 45 and a part thereof may abut the finger guide 49. For this reason, when the finger 46 located at the contact portion is a sealing finger, a part of the tube 48 is moved along with the operation of the finger 46 as shown in FIG. 49, and may not be completely crushed, and the flow path may not be completely sealed. As a result, there is a possibility that the transport accuracy of the chemical solution may be reduced. In medical practice, it may be necessary to strictly control the dose depending on the type of drug solution administered to the human body. As described above, the infusion pump 41 in which the sealing property of the tube 48 may be deteriorated cannot be used for the purpose of strictly controlling the medical solution.

Here, in order to prevent the above problem,
As shown in FIG. 11, it is conceivable that a tube guide 51 is provided corresponding to the sealing finger 46, and the width of the guide 51 is made as narrow as possible than that of the finger 46. In the case of this countermeasure, it is necessary to provide a projection 51 a that protrudes the guide 51 from the surface 43 of the main body case 42 in order to easily fit the tube 48 into the tube guide 51. For this reason, the finger plate 47 needs to be formed with a recess 47a or the like for avoiding interference with the projection 51a. On the other hand, when the tube 48 is randomly attached to the tube guide 51, the protrusion 51
The tube 48 may be damaged due to the tube 48 being sandwiched between the “a” and the finger plate 47.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to ensure the ease of mounting a tube in a groove, and to ensure the sealing performance when a tube is crushed by a sealing finger. It is an object of the present invention to provide an infusion pump capable of improving the accuracy of transporting a liquid.

[0008]

In order to achieve the above object, an invention according to claim 1 is provided with a groove for mounting a part of a tube provided on a surface of a main body case and connected to a container. The width of the groove is set to a size that allows the meandering of the tube mounted in the groove, and at least two of the grooves are provided in the groove and reciprocate in the depth direction of the groove to crush the tube. By providing a seal finger and a door case for opening and closing the surface of the main body case, by crushing the tube attached to the groove with the door case by the seal finger to partially seal the flow path of the tube, In the infusion pump configured to transport the liquid stored in the container through the tube, the width of the seal finger is set to be larger than the width of the groove.

According to the above configuration, the width of the groove is set to a size that allows the meandering of the tube, so that even the tube meandering due to winding or the like can be easily mounted in the groove. Here, when the meandering tube is mounted in the groove, a part thereof comes into contact with the side wall of the groove, and the contact position may coincide with the arrangement of the seal finger. However, since the width of the seal finger is set to be larger than the width of the groove, even if the seal finger reciprocates, the tube is not pinched between the side wall of the groove and the seal finger. Therefore, the tube mounted in the groove is reliably crushed between the seal finger and the door case, and the flow path is partially sealed.

In order to achieve the above object, according to the second aspect of the present invention, a groove is provided adjacent to the seal finger and is provided for compressing the tube without crushing the groove. The compression finger which reciprocates in the depth direction is provided.

According to the above construction, in addition to the operation of the first aspect, the transport of the liquid in the tube is assisted by the movement of the compression finger.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment embodying an infusion pump according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows an infusion pump 1 according to the present embodiment.
FIG. 3 is a partial sectional view showing the structure of FIG. This infusion pump 1
It is used as a medical infusion device, and is of a finger drive type that transports a drug solution contained in a container (not shown) such as a drug solution bag to a human body or the like via the tube 2. The infusion pump 1 includes a main body case 3 and a door case 5 that is opened and closed with respect to a surface 4 thereof. The main body case 3 has a handle 6 for transportation.

As shown in FIG. 2, the main body case 3 is provided with a concave groove 7 extending along the center of the surface 4 and a compression portion 8 for compressing the tube 2 at the center of the surface 4. The concave groove 7 is for mounting the tube 2. The compression part 8 has a plurality of (in this case, “seven”) fingers 9A, 9B, 9C, 9D, 9E,
9F and 9G. The groove 7 of this compression part 8
Is set to a size that allows the tube 2 mounted in the concave groove 7 to meander. On the other hand, as shown in FIG.
Finger plate 1 provided corresponding to compression section 8
One.

Each of the fingers 9A to 9G reciprocates in the depth direction of the concave groove 7 to press and compress the tube 2 with the finger plate 11.
As shown in FIG. 2, among these fingers 9A to 9G,
The one located at the top and the sixth located from the top are the seal fingers 9A and 9F for completely crushing the tube 2. These seal fingers 9
A and 9F have a flat plate shape.
a. These seal fingers 9A and 9F are for crushing the tube 2 flat with the buffer plate 11 to completely block the flow path of the chemical solution, that is, for sealing the flow path. It is indispensable to completely seal the tube 2 in this manner in order to ensure the accuracy of transporting the drug solution in the infusion pump 1. The four fingers and the like located between these two adjacent seal fingers 9A and 9F are compression fingers 9B to 9E and 9G for compressing the tube 2 without crushing it. These compression fingers 9B to 9E and 9G are
Unlike A and 9F, it simply forms a flat plate.

As shown in FIG. 3, the buffer plate 11
Is a long piece 11a and two independent pieces 11b and 11 that can move independently of the long piece 11a.
c. These independent pieces 11b and 11c are provided corresponding to the respective seal fingers 9A and 9F. In order to ensure smooth movement of the fingers 9A to 9G, some clearance is provided between the inner wall (finger guide) 12 of the concave groove 7 and the fingers 9A to 9G.

As shown in FIGS.
A and 9F are wider than the other compression fingers 9B to 9E and 9G, and are set to be larger than the width of the concave groove 7. That is, the width W1 of each of the compression fingers 9B to 9E, 9G is set smaller than the interval between the finger guides 12, while the width W2 of each seal finger 9A, 9F is set larger than the interval between the finger guides 12. Is done. For details,
Only at the positions of the seal fingers 9A and 9F, the width of the concave groove 7 is increased according to the size thereof, and is set to be larger than the interval between the finger guides 12.

As shown in FIG. 1, the main body case 3 is provided with a drive mechanism 13 for driving the fingers 9A to 9G. FIG. 4 shows the drive mechanism 13 alone. The driving mechanism 13 includes push rods 14A, 1A provided corresponding to the respective fingers 9A to 9G.
4B, 14C, 14D, 14E, 14F, 14G, a cam shaft 15 for reciprocating the push rods 14A to 14G, and a stepping for driving the cam shaft 15 via pulleys 16, 17 and a belt 18. And a motor 19. A plurality of cams 15a, 15b, 15c, 15d, 15e,
15f and 15g have mutually different profiles. The cams 15a to 15g are for reciprocating the push rods 14A to 14G, respectively. One end of each of the push rods 14A to 14G is in contact with each of the cams 15a to 15g by the force of an attached spring.

Next, the transport pump 1 constructed as described above
Will be described. To use this infusion pump 1,
As shown in FIGS. 1 and 5, first, a part of the tube 2 connected to the chemical solution bag is fitted along the concave groove 7, and the tube 2 is closed with the door case 5 from above. Thereby, the tube 2 is held between the cases 3 and 5. In this state, by activating the stepping motor 19 and rotating the camshaft 15, the push rods 14A to 14G reciprocate with the rotation of the cams 15a to 15g, respectively.
Accordingly, the fingers 9A to 9G are reciprocated toward the tube 2. Thereby, in the compression unit 8,
The tube 2 is sequentially rubbed down along the length direction of the concave groove 7 and compressed. As a result, the drug solution in the drug solution bag is transported to the human body or the like through the tube 2.

According to the configuration of the infusion pump 1, the width of the concave groove 7 in the compression section 8, that is, the interval between the finger guides 12 is set to a size that allows the tube 2 to meander. For this reason, the tube 2 meandering by winding etc.
However, the tube 2 can be easily mounted in the concave groove 7.

Here, as shown in FIG. 4, when the meandering tube 2 is mounted in the concave groove 7 of the compression section 8, a part thereof comes into contact with the side wall of the concave groove 7, that is, the finger guide 12. And the contact position may coincide with the arrangement of the seal fingers 9A and 9F. However, since the width W2 of the seal fingers 9A and 9F is larger than the distance between the finger guides 12, when the seal fingers 9A and 9F reciprocate, as shown in FIG. It is not sandwiched between the fingers 9A and 9F, but is securely sandwiched between the seal fingers 9A and 9F and the buffer plate 11. Therefore, the tube 2 mounted in the concave groove 7 has the seal fingers 9A, 9A.
F is reliably crushed between F and the buffer plate 11, so that the flow path is partially sealed.

As a result, even if the tube 2 is meandering, it is possible to ensure the ease of installation in the groove 7. At the same time, the tube 2 can be reliably crushed by the seal fingers 9A and 9F to ensure the sealing performance. In this sense, it is possible to increase the accuracy of transporting the chemical solution by the infusion pump 1. In particular, when it is necessary to strictly control the dose of a drug solution to be administered to the human body at a medical site, the use of the infusion pump 1 enables the drug solution to be strictly controlled.

It is also conceivable that the contact position between the meandering tube 2 and the finger guide 12 matches the arrangement of the compression fingers 9B to 9E and 9G. However, since the compression fingers 9B to 9E and 9G are not originally for completely crushing the tube 2, the sealing performance does not matter.

Further, according to the configuration of the infusion pump 1,
As in the conventional infusion pump shown in FIG. 10, a tube guide 5 having a width smaller than the width of the sealing finger 50.
It is not necessary to provide 1 or the recess 47a.
For this reason, even if the tube 2 is randomly mounted in the concave groove 7, there is no possibility that the tube 2 will be damaged by being caught by the projection 51a or the like.

In the infusion pump 1, the seal fingers 9
A, Compression fingers 9B-9 provided adjacent to 9F
Because of having E and 9G, the transport of the chemical solution in the tube 2 is assisted by the movement of the compression fingers 9B to 9E and 9G. Therefore, the cooperation between the seal fingers 9A and 9F and the compression fingers 9B to 9E and 9G enables the chemical solution to be efficiently transported.

It should be noted that the present invention is not limited to the above-described embodiment, but can be implemented as follows without departing from the spirit of the invention.

In the above embodiment, two seal fingers 9A and 9F and a plurality of compression fingers 9B to 9E and 9G arranged between them are provided. On the other hand, as shown in FIG.
It may be 1. Alternatively, the seal fingers and the compression fingers may be arranged alternately.

[0028]

According to the first aspect of the present invention,
Liquid is transported through the tube by crushing the tube attached to the groove having a width that allows the meandering of the tube with the door case by the seal finger to partially seal the flow path of the tube. In such an infusion pump, the width of the seal finger is set to be larger than the width of the groove. Therefore, even the meandering tube can be easily mounted in the groove. Also, since the width of the seal finger is larger than the groove width, the tube is not pinched between the groove side wall and the seal finger, and the mounted tube is securely crushed between the seal finger and the door case. The flow path is partially sealed. For this reason, it is possible to ensure the ease of mounting the tube, and at the same time, it is possible to ensure the sealability of the seal finger, to reliably transport the liquid in the container through the tube, and to improve the accuracy of transporting the liquid. The effect that can be improved is exhibited.

According to the configuration of the second aspect of the present invention, in the configuration of the first aspect of the present invention, a compression finger for compressing the tube without crushing the tube is provided adjacent to the seal finger. Therefore, in addition to the actions and effects of the first aspect, the transport of the liquid in the tube is assisted by the movement of the compression finger. For this reason, the effect that the liquid can be transported efficiently by the cooperation of the seal finger and the compression finger is exhibited.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing a structure of an infusion pump according to one embodiment.

FIG. 2 is a plan view showing the surface of a main body case.

FIG. 3 is a plan view showing the inner surface of the door case.

FIG. 4 is a side view showing the driving mechanism.

FIG. 5 is a plan view showing a compression unit.

FIG. 6 is an enlarged sectional view showing a main part of the compression unit.

FIG. 7 is a plan view showing a compression section according to another embodiment.

FIG. 8 is a sectional view showing a conventional infusion pump.

FIG. 9 is a plan view showing the surface of a conventional main body case.

FIG. 10 is an enlarged sectional view showing a main part of a conventional compression unit.

FIG. 11 is an enlarged sectional view showing a main part of a conventional compression unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Infusion pump 2 Tube 3 Main body case 4 Surface 5 Door case 7 Groove 9A, 9F Seal finger 9B-9E Compression finger

Claims (2)

[Claims] 1. A groove provided on a surface of a main body case for mounting a part of a tube connected to a container, and a width of the groove is set to a size that allows the tube mounted in the groove to meander. Being set, at least one seal finger provided in the groove and reciprocating in the depth direction of the groove to crush the tube, and a door case for opening and closing the surface of the main body case. The liquid contained in the container is passed through the tube by crushing the tube attached to the groove with the seal case with the seal finger to partially seal the flow path of the tube. In a transfusion pump, the width of the seal finger is set to be larger than the width of the groove. 2. The infusion pump according to claim 1, further comprising: a compression finger provided adjacent to the seal finger and reciprocating in a depth direction of the groove to compress the tube without crushing the tube. An infusion pump characterized in that: