JP6969860B2 - Indwelling needle assembly - Google Patents

Description

In the present invention, a puncture portion is punctured into a blood vessel of a patient, and an opening is formed in which blood can be collected from the blood vessel or liquid can be injected into the blood vessel. The puncture portion communicates with the opening and is collected from the blood vessel of the patient. It relates to an assembly of an indwelling needle having a flow section through which a liquid to be injected into blood or a blood vessel can flow.

While collecting blood from the patient's body, the blood is diluted with a predetermined diluent, and the blood glucose level is detected in real time by a blood glucose level detector such as a glucose sensor, and if the detected blood glucose level is excessively high, , An artificial pancreas device that can inject insulin into a patient to lower the blood glucose level and, if the detected blood glucose level is excessively low, inject glucose into the patient to raise the blood glucose level has been proposed. There is.

Such an artificial pancreas device has, for example, as disclosed in Patent Document 1, a diluting device (sampling device) for diluting the blood supplied to the blood glucose level detecting device. Such a diluting device is punctured into the blood vessel of the patient and communicates with the puncture portion having an opening through which blood can be collected from the blood vessel, and the blood collected from the blood vessel of the patient can be circulated through the puncture portion. An indwelling needle with a portion was attached. Then, the distribution unit in the conventional indwelling needle, and diluted liquid diluent introduction passage capable of being introduced into the circulating unit the diluent introduced with the blood collected from the opening of the puncture in the diluent introduction passage A diluted blood lead-out channel that can derive diluted blood formed by mixing with and is inserted, and the diluted blood can be supplied to the glucose sensor of the blood glucose level detector in the distribution section to detect the blood glucose level. It was supposed to be.

Japanese Unexamined Patent Publication No. 2013-245664

However, in the indwelling needle according to the above-mentioned prior art, when the puncture portion is punctured into the blood vessel of the patient, the opening from which blood can be collected may come into contact with the blood vessel wall, and the opening hits the blood vessel wall. There was a problem that blood could not be collected well when the blood was occluded by contact. In addition, even in an indwelling needle in which a puncture portion is punctured into a blood vessel and a liquid such as a drug solution is injected into the blood vessel from the opening, there is a similar problem that the opening may come into contact with the blood vessel wall and become obstructed. rice field.

The present invention has been made in view of such circumstances, and it is possible to prevent the opening of the puncture portion from contacting the blood vessel wall and obstructing the blood vessel wall, and it is always good to collect blood or inject liquid. To provide an assembly of indwelling needles that can be made to.

The invention according to claim 1 is punctured into a blood vessel of a patient, and the puncture portion is formed with an opening from which blood can be collected from the blood vessel , and the puncture portion communicates with the opening and is collected from the blood vessel of the patient. In an assembly of an indwelling needle provided with an indwelling needle having a flow section through which blood can flow and a connector that holds a flow path of liquid and is connectable to the indwelling needle, the connector together with the flow path. When the base end is fixed to the flow portion and the tip portion is provided with a protruding member protruding from the opening portion, and the opening portion of the puncture portion is punctured by a blood vessel to collect blood. The tip of the protruding member interferes with the blood vessel wall to maintain the inflow of blood from the opening, and the tip has a spherical shape having a diameter smaller than that of the opening of the puncture portion. It is a feature.

The invention according to claim 2 is characterized in that, in the assembly of the indwelling needle according to claim 1, the protruding member is composed of a linear member.

The invention according to claim 3 is the assembly of the indwelling needle according to claim 1 or 2 , wherein the flow path of the fluid is a diluent introduction flow path capable of introducing a diluent into the flow section, and the above-mentioned. The distribution section is composed of a diluted blood lead-out channel capable of deriving a diluted blood obtained by mixing the blood collected from the opening of the puncture portion and the diluted solution introduced in the diluted solution introduction channel. In addition to the member, the diluted solution introduction flow path and the diluted blood lead-out flow path are inserted therein.

According to the fourth aspect of the present invention, in the indwelling needle according to the third aspect , the indwelling needle can be connected to a connector holding the diluted solution introduction flow path and the diluted blood lead-out flow path, and the base end of the protruding member is the connector. In the process of connecting the connector, the diluted liquid introduction flow path, the diluted blood lead-out flow path, and the projecting member are inserted into the flow section.

According to the first aspect of the present invention, the opening of the puncture portion is in contact with the blood vessel wall and is blocked because the protrusion is provided with the protrusion portion protruding from the opening while being inserted into the distribution portion. It can be prevented and blood sampling can always be performed well.
Further, since the tip portion is spherical, it is possible to reduce the irritation given to the patient when the spherical tip portion abuts on the blood vessel wall.

According to the second aspect of the present invention, since the projecting member is made of a linear member, it is possible to prevent the projecting member composed of the linear member from obstructing the flow of blood or liquid in the distribution section.

According to the invention of claim 3 , in addition to the projecting member, the flow unit includes a diluent introduction flow path capable of introducing the diluted solution into the flow part, and a blood and diluted solution introduction flow path collected from the opening of the puncture portion. Since a diluted blood outlet channel that can derive diluted blood by mixing with the diluted solution introduced in the above is inserted, the opening of the puncture site is a blood vessel in the indwelling needle that can dilute while collecting blood. It is possible to prevent the blood from coming into contact with the wall and becoming obstructed, and it is possible to produce diluted blood with high accuracy.

According to the invention of claim 4 , it is possible to connect to a connector holding a diluted solution introduction flow path and a diluted blood lead-out flow path, and the base end of the protruding member is fixed to the connector to connect the connector. In the process, the diluting liquid introduction flow path, the diluted blood lead-out flow path, and the projecting member are inserted into the flow section, so that the protruding end portion of the projecting member can be projected from the opening when connecting the connector to the indwelling needle. ..

Schematic diagram showing a diluting device and a blood glucose level detecting device to which the assembly of the indwelling needle according to the embodiment of the present invention is applied. A perspective view showing the appearance of the assembly of the indwelling needle. Side view and rear view showing the assembly of the indwelling needle FIG. 3 is a sectional view taken along line IV-IV. FIG. 3 is a sectional view taken along line VV. A perspective view showing the appearance of the assembly of the indwelling needle and the connection process with the connector. Side view showing the connection process with the connector in the assembly of the indwelling needle

Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
The indwelling needle assembly according to the present embodiment is applied to a diluting device A for diluting a patient's blood and detecting a blood glucose level with a blood glucose level detecting device, and the diluting device A is shown in FIG. As shown in the above, the device comprises a medical device connected to a blood glucose level detecting device S capable of detecting the blood glucose level of blood, includes a multi-pump P composed of an ironing type pump, and a plurality of flexible tubes (L1 to L4). ) Is attached and configured.

The flexible tube L1 (diluted solution introduction flow path) is connected to a storage bag B1 containing a heparin-added physiological saline solution containing heparin (anticoagulant) in a physiological saline solution at one end, and the other end thereof. It consists of a flow path of liquid connected to the indwelling needle 1 via the connector 3. The flexible tube L2 (diluted blood outlet flow path) has a mixing portion M having one end connected to the indwelling needle 1 via a connector 3 and the other end consisting of a chamber or the like arranged in the blood glucose level detecting device S. Consists of a flow path of liquid connected to. The flexible tube L3 is composed of a liquid flow path to which a storage bag B2 containing a physiological saline solution is connected to one end and a liquid flow path to which the other end is connected to a predetermined position of the flexible tube L2. The flexible tube L4 is connected to a storage bag B3 containing a glucose standard solution at one end, and the other end is connected to a predetermined position of the flexible tube L1 and the flexible tube L2 from a liquid flow path. Become.

The indwelling needle 1 is connected to the tip of the flexible tube L1 (diluted liquid introduction flow path) and the tip of the flexible tube L2 (diluted blood outlet flow path), respectively, and can be punctured by the patient. The blood of the patient is collected while guiding the diluted solution in the bag B1 to the inside, and the blood can be supplied to the mixing unit M of the blood glucose level detecting device S in a state of being mixed with the diluted solution. The mixing unit M is connected to the glucose sensor T of the blood glucose level detecting device S, and the diluted solution mixed substantially uniformly in the mixing unit M is supplied to the glucose sensor T via the flexible tubes L7 and L8. It is supposed to be done.

Further, by supplying the physiological saline solution of the storage bag B2, the flexible tubes L1 to L10 attached to the diluting device A and the blood glucose level detecting device S and the connecting parts can be cleaned (primed). It is possible to calibrate the glucose sensor T by detecting the blood glucose level with the glucose sensor T while supplying the glucose standard solution of the storage bag B3.

The multi-pump P has flexible tubes L1 and L2 attached to it, and can simultaneously flow the diluent and blood at a predetermined ratio. It is attached to a plurality of rotors that can be rotationally driven by a motor and each rotor. It is provided with a roller capable of squeezing the flexible tubes L1 and L2 to allow the liquid to flow. The flexible tubes L5, L6, and L9 on the blood glucose level detection device S side are also attached to the multi-pump P, and the flexible tubes L1, L2, L5, L6, and L9 are simultaneously squeezed to squeeze the liquid. It is designed to flow.

On the other hand, the blood glucose level detecting device S has a flexible tube L5 having one end connected to a storage bag B4 containing a diluent and the other end connected to a mixing portion M, and one end being opened to the atmosphere. A flexible tube L6 whose other end is connected to the mixing portion M, a flexible tube L7 whose other end is connected to the mixing portion M and whose other end is connected to the chamber N, and one end connected to the chamber N. At the same time, the other end was connected to the flexible tube L8 connected to the glucose sensor T, one end was connected to the glucose sensor T, and the other end was connected to the drainage bag B5 for accommodating the drainage. It is configured to have a flexible tube L9 and a flexible tube L10 having one end connected to the chamber N and the other end connected to the storage bag B5.

The glucose sensor T continuously guides the diluted patient's blood supplied from the diluting device A onto the enzyme membrane to decompose glucose, and can detect the blood glucose level from the current value generated during the decomposition. It is connected to the drainage bag B5 via the flexible tube L9. The patient's blood (blood diluted with heparinized saline) supplied to the mixing section M by the flexible tube L2 is further diluted with the diluted solution supplied by the flexible tube L5. After that, the blood glucose level is detected by the glucose sensor T, and the blood glucose level is discharged to the drainage bag B5 via the flexible tube L9. Air is supplied to the mixing unit M via the flexible tube L6, and is configured to allow the blood and the diluted solution to be mixed well.

Here, as shown in FIGS. 2 to 5, the indwelling needle 1 according to the present embodiment is punctured into the blood vessel of the patient, and the puncture portion has an opening 1aa formed at the tip thereof so that blood can be collected from the blood vessel. It is inserted into the circulation section 1b, which communicates with the opening 1a and allows blood collected from the blood vessel of the patient to flow, the proximal end portion 1c having a male screw formed on the outer peripheral surface, and the circulation section 1b. The protruding end portion 2a is configured to have a protruding member 2 protruding from the opening portion 1aa.

The puncture portion 1a, the flow section 1b, and the proximal end portion 1c are made of an integral member, and the flow section 1b is flexible as a diluent introduction flow path in which the diluent can be introduced into the flow section 1b in addition to the projecting member 2. Derivation of diluted blood capable of deriving diluted blood obtained by mixing the sex tube L1, the blood collected from the opening 1aa of the puncture portion 1a, and the diluted solution introduced in the diluted solution introduction flow path (flexible tube L1). It is configured by inserting a flexible tube L2 as a flow path.

The projecting member 2 is made of a linear member obtained by linearly molding a metal material such as stainless steel or a resin material such as polypropylene, and the tip portion 2a at the tip is spherical and the base end 2b (see FIG. 4) is formed. For example, it is fixed to the connector 3 by adhesion or the like. The tip portion 2a has a spherical shape having a diameter smaller than that of the opening portion 1aa of the puncture portion 1a, and is located at a position separated from the opening portion 1aa by a predetermined dimension while the connector 3 is connected to the base end portion 1c of the distribution portion 1b. It is set to be. The tip portion 2a may be either one in which a spherical homogeneous material (stainless steel, polypropylene, etc.) is welded or adhered to the tip of the projecting member 2, or one in which the tip portion 2a is integrally molded into a spherical shape.

The connector 3 holds the flexible tube L1 (diluted liquid introduction flow path) and the flexible tube L2 (diluted blood outlet flow path), and can be connected to the base end portion 1c of the indwelling needle 1. .. More specifically, as shown in FIGS. 6 and 7, the connector 3 holds the flexible tube L1 (diluted liquid introduction flow path) and the flexible tube L2 (diluted blood outlet flow path), and protrudes. It has a holding portion 3a for fixing the base end 2b of the member 2, and a lock member 3b having a male screw formed on the base end 1c of the indwelling needle 1 and a female screw screwable on the inner peripheral surface. When the indwelling needle 1 is connected to the connector 3, the lock member 3b is rotated while being displaced in the axial direction of the indwelling needle 1, so that the male screw and the female screw can be screwed and locked. ing.

Then, in the process of connecting the connector 3 to the indwelling needle 1, as shown in FIGS. 6 and 7, the flexible tube L1 (diluting liquid introduction flow path) and the flexible tube held and fixed to the holding portion 3a. As shown in FIGS. 2 to 5, with L2 (diluted blood lead-out flow path) and the projecting member 2 inserted into the flow section 1b of the indwelling needle 1 and connected and locked, the tip portion 2a of the projecting member 2 Is in a state of protruding from the opening 1aa.

According to the indwelling needle assembly according to the present embodiment, since the indwelling needle assembly is inserted into the flow portion 1b and the protruding end portion 2a is provided with the protruding member 2 protruding from the opening portion 1aa, the opening portion 1aa of the puncture portion 1a is a blood vessel. It is possible to prevent the blood from coming into contact with the wall and being blocked, and it is possible to keep the blood collected in a good manner at all times. That is, even if the opening 1aa of the puncture portion 1a is punctured at a position close to the blood vessel wall, the tip portion 2a of the protruding member 2 interferes with the blood vessel wall to reliably maintain the inflow of blood from the opening 1aa. You can do it.

Further, since the protruding member 2 according to the present embodiment is made of a linear member and the tip portion 2a is spherical, it is possible to prevent the protruding member 2 made of the linear member from obstructing the blood in the distribution portion 1b. At the same time, it is possible to reduce the irritation given to the patient when the spherical tip portion 2a abuts on the blood vessel wall. The protruding member 2 may be a single linear member or a stranded wire composed of a plurality of linear members.

Further, in addition to the projecting member 2, the flow section 1b according to the present embodiment is connected to the diluent introduction flow path (flexible tube L1) capable of introducing the diluent into the flow section 1b, and the opening 1aa of the puncture section 1a. A diluted blood outlet channel (flexible tube L2) capable of deriving diluted blood formed by mixing the collected blood and the diluted solution introduced in the diluent introduction channel (flexible tube L1) is inserted. Therefore, in the indwelling needle 1 capable of diluting blood while collecting blood, it is possible to prevent the opening 1aa of the puncture portion 1a from contacting the blood vessel wall and obstructing the blood vessel wall, so that diluted blood can be accurately produced. be able to.

In addition, the indwelling needle assembly according to the present embodiment can be connected to the connector 3 holding the diluted liquid introduction flow path (flexible tube L1) and the diluted blood lead-out flow path (flexible tube L2). At the same time, the base end 2c of the projecting member 2 is fixed to the connector 3, and in the process of connecting the connector 3, the diluent introduction flow path (flexible tube L1) and the diluted blood lead-out flow path (flexibility). Since the tube L2) and the protruding member 2 are inserted into the flow portion 1b, the protruding end portion 2a of the protruding member 2 can be projected from the opening 1aa when the connector 3 is connected to the indwelling needle 1.

Although the present embodiment has been described above, the present invention is not limited to this, for example, a puncture portion 1a in which an opening 1aa is formed so that the blood vessel can be punctured and a liquid can be injected into the blood vessel. In the indwelling needle 1 having a flow section 1b that communicates with the opening 1a and allows the liquid to be injected into the blood vessel to flow, the projecting member 2 is inserted into the flow section 1b and the tip portion 2a protrudes from the opening 1aa. May be provided.

In this case, as in the above embodiment, since the protrusion 2a is inserted into the flow portion 1b and the tip portion 2a is provided with the protruding member 2 protruding from the opening 2aa, the opening 1aa of the puncture portion 1a abuts on the blood vessel wall. It is possible to prevent the blockage from being blocked, and it is possible to always perform good injection of the liquid at the time of infusion. Further, as in the above embodiment, if the projecting member 2 is made of a linear member and the tip portion 2a is spherical, it is possible to prevent the projecting member 2 formed of the linear member from obstructing the flow of the liquid in the flow section 1b. At the same time, it is possible to reduce the irritation given to the patient when the spherical tip portion 2a abuts on the blood vessel wall.

Although this embodiment is applied to a diluting device A (or an infusion device that injects a liquid such as a drug into a patient's blood vessel) that dilutes the patient's blood while collecting it, it is applied to another device (for dialysis treatment or the like). It may be an indwelling needle applied to the blood purification device used). Further, the projecting member 2 inserted through the distribution unit 1b is not limited to one, and may be composed of a plurality of members (having a plurality of tip portions).

The indwelling needle assembly of the present invention is inserted into the flow section with the base end fixed to the connector together with the flow path, and is provided with a protruding member having a protruding end portion protruding from the opening portion, and the opening portion of the puncture portion. If the tip of the protruding member interferes with the blood vessel wall to maintain the inflow of blood from the opening when the blood is stabbed in the blood vessel and the blood is collected, the appearance shape is different or other. It may be the one to which the function is added.

1 Indwelling needle 1a Puncture part 1b Flow part 2 Protruding member 2a Protrusion part 3 Connector L1 Flexible tube (diluting liquid introduction flow path)
L2 flexible tube (diluted blood outlet channel)

Claims (4)

A puncture portion that is punctured into a patient's blood vessel and has an opening through which blood can be collected from the blood vessel, and a circulation portion that communicates with the opening and allows blood collected from the patient's blood vessel to circulate. With the indwelling needle that I had
A connector that holds the liquid flow path and can be connected to the indwelling needle ,
In the assembly of the indwelling needle equipped with
It is inserted into the flow section with the base end fixed to the connector together with the flow path, and the protruding end portion is provided with a protruding member protruding from the opening portion, and the opening portion of the puncture portion is punctured by a blood vessel. When blood is collected, the tip of the protruding member interferes with the blood vessel wall to maintain the inflow of blood from the opening, and the tip has a diameter smaller than that of the opening of the puncture portion. An assembly of indwelling needles characterized by being spherical . The assembly of an indwelling needle according to claim 1, wherein the protruding member is made of a linear member. The flow path of the fluid
A diluent introduction flow path that can introduce the diluent into the distribution section,
A diluted blood outlet flow path capable of deriving diluted blood formed by mixing blood collected from the opening of the puncture portion and the diluted solution introduced in the diluted solution introduction flow path, and a diluted blood lead-out flow path.
The assembly of the indwelling needle according to claim 1 or 2 , wherein the distribution unit is formed by inserting the diluted liquid introduction flow path and the diluted blood lead-out flow path in addition to the protruding member. .. The diluent can be connected to a connector holding the diluent introduction flow path and the diluted blood lead-out flow path, and the base end of the protruding member is fixed to the connector. The assembly of the indwelling needle according to claim 3, wherein the introduction flow path, the diluted blood lead-out flow path, and the projecting member are inserted into the flow section.

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