JP2011255065A - Injection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device capable of injecting a desired amount of two kinds of fluid substances separately at a part by one puncture and performing a stable operation with a hand placed between eyebrows.
An injection device for injecting a plurality of fluid substances, a first syringe for supplying a first fluid substance, a second syringe for supplying a second fluid substance, and the first syringe. Including a housing having a first connection portion and a second connection portion to which a tip portion of one syringe and the second syringe can be connected, respectively, and a double lumen puncture portion protruding from the housing, Are provided with a first flow path and a second flow path provided at the tips of the first connection section and the second connection section, and the first flow path and the second flow path are An injection device characterized in that it communicates with each lumen of the puncture unit, and the length of the puncture unit is 15 to 40 mm.
[Selection] Figure 2

Description

  The present invention relates to an injection device. More specifically, the injection device is suitable for use in cataract surgery.

  Cataract is a disease in which the lens in the eyeballs becomes grayish white or brownish brown, and it becomes difficult to see things blurred or blurred. Eventually, it can cause blindness. Due to the onset of cataract, the lens once clouded does not return.

  If the turbidity is mild, there is also a therapy that delays the progression of cataracts by drug therapy such as eye drops, but if it interferes with life, in order to restore vision, remove the turbid lens and use an artificial lens instead of the lens It is common for surgery to be performed. In recent years, surgery is often performed in view of the shortening of the operation time, the improvement period of the postoperative visual acuity prognosis, and the meaning of QOL.

  In the above cataract surgery, it is important to keep the cornea transparent by ultrasonic vibration oscillated from the ultrasonic lens emulsification suction device used when removing the turbid lens, contact of finely scattered lens pieces, etc. There is a risk of damaging the working corneal endothelial cells. Therefore, a viscoelastic substance is supplemented into the anterior chamber for the purpose of protecting corneal endothelial cells during surgery. Some viscoelastic substances have high molecular weight with excellent ability to retain anterior chamber and low molecular weight with excellent corneal endothelial cell protection, but the former is easily removed by suction during surgery, and the latter is difficult to remove by suction. There is a nature. Injecting high molecular weight after injecting low molecular weight, which is hard to be removed by suction, into the corneal endothelial cell side, forming the anterior chamber with a double layer of viscoelastic material like a shell, facilitating lens removal surgery while protecting corneal endothelial cells There is a way to do it. This method is called a soft shell method.

  When performing the soft shell method, firstly inject the low molecular weight viscoelastic substance injected into the corneal endothelial cell side into the anterior chamber after first injecting a low molecular weight viscoelastic substance excellent in protective effect on the corneal endothelial cells. A high molecular weight viscoelastic material is injected to form the anterior chamber. Thereafter, the anterior lens capsule is incised, and the lens is pulverized and sucked with an ultrasonic lens emulsification suction device, and an artificial lens is inserted. The viscoelastic substance needs to be removed by suction from the anterior chamber after the artificial lens is inserted, but the low molecular weight viscoelastic substance has an excellent protective effect on the corneal endothelium, but has a drawback that it is difficult to remove by suction after the operation. Therefore, in order to reduce the amount of low molecular weight viscoelastic substance used as much as possible, a high molecular weight viscoelastic substance that is easily removed by suction is used in combination with anterior chamber formation.

The longer the ultrasonic lens emulsification suction time when removing the lens, the stronger the damage to the corneal endothelial cells. The soft shell method using the above two types of viscoelastic substances is often used in cases with high lens hardness where the ultrasonic lens emulsification and suction time is long, but since it can be easily performed by beginners, surgery is immature. Beginners are particularly encouraged. However, since two types of viscoelastic substances are injected into the anterior chamber, there is a problem that it is complicated to puncture the eyeball twice.

  Here, as a device for administering two kinds of substances, for example, a device as disclosed in Patent Document 1 can be cited. This is an administration device mainly for bioadhesives. Since the bioadhesive is used by mixing (reacting) two types of liquid agents, it has a shape in which two types of liquid agents are sprayed simultaneously, and the nozzle tip is in a state where the two liquids are mixed. One spraying port is provided so that it can be sprayed.

JP-A-11-76245

  With regard to the soft shell method, there is an appropriate amount of viscoelastic material for forming the bulge of the anterior chamber, and more specifically, there is an appropriate amount for each of a low molecular weight viscoelastic material and a high molecular weight viscoelastic material. If the thing of patent document 1 is employ | adopted, when inject | pouring a low molecular weight viscoelastic substance and then injecting a high molecular weight viscoelastic substance, before inject | pouring a high molecular weight viscoelastic substance, the low molecular weight viscoelastic substance which remained in the nozzle It is essential to extrude. For this reason, the low molecular weight viscoelastic substance results in pushing out an excessive amount.

  Therefore, it is necessary to puncture the eyeball once and to administer an appropriate amount of a plurality of liquids and to have a structure that is easy to operate.

  An object of the present invention is to provide an injection device that can puncture an eyeball once, can administer appropriate amounts of a plurality of liquids, and has a shape that facilitates surgery.

  Therefore, the present inventors are an injection device for injecting a fluid substance, a first syringe for supplying a first fluid substance, a second syringe for supplying a second fluid substance, A housing having a first connecting portion and a second connecting portion to which tip ends of the first syringe and the second syringe can be connected, respectively, and a double lumen puncturing portion protruding from the housing; A first flow path and a second flow path provided at the tips of the first connection portion and the second connection portion are provided in the first flow path and the second flow path. The tract communicates with each lumen of the puncture unit, and the length of the puncture unit is 15 to 40 mm. It is possible to inject a desired amount of flowable substances separately Found, it led to the invention of the present application.

  Moreover, you may bend the front-end | tip part of a puncture part at 10 degrees-90 degrees, Preferably it is bent at 10-50 degrees. By bending the tip of the puncture part, the puncture part is placed in the anterior chamber and the hand can be placed in a comfortable state between the eyebrows, etc., so that the operation can be continued in a stable posture. Because.

  The first syringe and the second syringe may be provided in parallel so that the base ends of the respective syringes are not aligned, and the first connection portion and the second connection portion are the base ends of the respective connection portions. May be provided in parallel so as not to be aligned. The first fluid substance and the second fluid substance are injected separately. By shifting the base end, for example, it is easy to grasp which fluid substance is injected first. it can. As a result, the injection operation of two kinds of fluid substances can be performed quickly. Further, if the base ends of the connecting portions are not aligned, even if the first syringe and the second syringe are syringes in which the finger-hanging portion protrudes in the entire circumferential direction, they do not interfere with each other. Connection is possible.

  Furthermore, you may provide the fixing tool which fixes said 1st syringe and said 2nd syringe in parallel.

  The injection device of the present invention can inject a desired amount of two kinds of flowable substances separately in a single puncture, and the length of the puncture part is 15 to 40 mm. Since it can be placed and operated in a stable manner, it can be suitably used for medical treatment.

It is a longitudinal cross-sectional view of the injection device which has not connected the syringe of this invention. It is a front view of the injection device of the present invention. It is a side view of the injection device which bent the front-end | tip part of the puncture part of this invention. It is the front view which provided the fixing device in the injection device of this invention.

  The injection device of the present invention will be described with reference to FIG. A double-lumen puncture portion 2 is provided at the distal end of the housing 1, and a first connection portion 13 and a second connection portion 14 are provided at the proximal end of the housing 1. The first connecting portion 13 passes through the first flow path 11 provided in the housing, and the second connecting portion 14 passes through the second flow path 12 provided in the housing, respectively. Communicated with. A first syringe 3 for supplying a first fluid substance is connected to the first connection portion 13, and a second syringe 4 for supplying a second fluid substance is connected to the second connection portion 14. Has been. The length of the puncture portion is 15 to 40 mm so that the body can be stably operated during the operation. Moreover, sliding resistance can also be restrained low by setting it as 15-40 mm.

  The injection device of FIG. 1 has a puncture portion in which the base end of the first connection portion and the second connection portion are provided in parallel, and the base end of each connection portion and the base end of each syringe are not aligned. Asymmetry about the axis. By arranging in this way, the syringe can be connected so as not to interfere with each other even if the finger-hanging portions of the syringes protrude in the entire circumferential direction, and the flowable substances filled in the individual syringes can be separated. Easy to inject into.

  Moreover, as shown in FIG. 2, you may provide the fixing tool which can connect and fix a 1st syringe and a 2nd syringe in parallel. By the fixing device, the syringe connected to each connection portion is fixed and stability is increased.

  The puncture unit 2 may be bent at the tip. The injection device shown in FIG. 1 is used by grasping the housing so that the puncture part is sandwiched between the index finger and the middle finger. Here, by bending the tip of the puncture portion 2 as shown in FIG. 3, the puncture portion is punctured into the anterior chamber, so that the hand can be placed in a comfortable state between the eyebrows, etc. It is possible and preferable to continue surgery in a posture. The angle of bending is preferably 10 ° to 90 °, and more preferably 10 to 50 °.

  As described above, the injection device of the present invention can inject a desired amount of two kinds of fluid substances separately into a part by one puncture, and the length of the puncture portion is 15 to 40 mm. Since the operation can be performed in a stable manner by placing a hand between the eyebrows, it can be suitably used for medical treatment.

DESCRIPTION OF SYMBOLS 1 Housing 11 1st flow path 12 2nd flow path 13 1st connection part 14 2nd connection part 2 Puncture part 3 1st syringe 4 2nd syringe

Claims (6)

An injection device for injecting a plurality of fluid substances,
A first syringe for supplying a first flowable substance;
A second syringe for supplying a second flowable substance;
A housing having a first connection part and a second connection part, each of which is connectable to a tip part of the first syringe and the second syringe;
A double-lumen puncture portion protruding from the housing,
In the housing, a first flow path and a second flow path provided at the tips of the first connection portion and the second connection portion are provided,
The first channel and the second channel communicate with each lumen of the puncture portion,
The length of the said puncture part is 15-40 mm, The injection device characterized by the above-mentioned.   The injection device according to claim 1, wherein the puncture portion has a distal end bent at 10 ° to 90 °.   The injection device according to claim 1 or 2, wherein the puncture portion has a distal end bent at 10 ° to 50 °.   The injection device according to any one of claims 1 to 3, wherein the first syringe and the second syringe are provided in parallel so that the base ends of the syringes are not aligned.   The injection device according to any one of claims 1 to 4, wherein the first connection portion and the second connection portion are provided in parallel so that base ends of the respective connection portions are not aligned.   Furthermore, the injection device in any one of Claim 1 to 5 which has a fixing device which fixes said 1st syringe and said 2nd syringe in parallel.

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