JP2000033097A - Perfusion sleeve of 1.6 mm in outside diameter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a small incision a standard operation technique in cataract ultrasonic emulsification suction and intraocular lens insertion by specifying the outside diameter of a perfusion sleeve to the range of specific values. SOLUTION: The perfusion sleeve is formed by pouring silicon into metal molds of 1.40 to 1.72 mm (1.6 mm in this embodiment) in outside diameter to cast it. The silicone rubber is capable of assuring a perfusion rate without allowing a hard matter to be crushed into a wound. The perfusion rate is made nearly constant if the diameter and number of pieces of perfusion ports are made the same as those of the conventional products. Manufacture is easy even in the case of a stainless steel. The perfusion sleeve is put on an ultrasonic tip of 0.89 mm in outside diameter and is likewise put on a suction force canula of 0.89 mm in outside diameter and is used as a perfusion suction hand piece. The incised wound is made 2.7 mm by using the same. The insertion and manipulation of the appliances necessary for the ultrasonic emulsification suction and intraocular lens insertion are made possible in spite of such small incision. The perfusion rate and leakage rate which are substantially the same as heretofore are thus obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a perfusion sleeve for supplying an irrigation solution into an anterior chamber by covering an ultrasonic chip and a suction cannula (perfusion suction handpiece) used in ophthalmic cataract ultrasonic emulsification suction. It is about.

[0002]

2. Description of the Related Art Cataract ultrasonic emulsification has been used for about 15 years, but the outer diameter of the perfusion sleeve is still 1.8 mm (1.77 mm ± 0.4 mm). Therefore, the size of the incision wound is 3 mm ± 0.2 mm.

[0003]

Therefore, based on the perfusion sleeve of 1.6 mm in outer diameter of the present invention, a perfusion suction handpiece with an ultrasonic tip of 0.89 mm in outer diameter and a cannula of 0.89 mm in outer diameter and a small size are used. Foldable intraocular lens with collapsible, small incision in cataract ultrasonic emulsification and intraocular lens insertion (2.55
mm to 2.8 mm) as a standard (popular) procedure.

[0004]

Means for Solving the Problems The outer diameter of the ultrasonic tip is 0.89 mm, and the outer diameter of the suction cannula of the perfusion suction handpiece is 0.89 mm. The outer diameter of the injector of the foldable intraocular lens (the auxiliary cylinder for inserting the lens into the anterior chamber) is set to about 1.7 mm. The perfusion sleeve of the present invention has an outer diameter of 1.6 mm and an inner diameter of 1.4 mm. For this combination of instruments, the incision wound may be 2.67 mm.
(Length of wound = 1.7 mm × 3.14 ÷ 2) The gap between the outer diameter of the cannula of the ultrasonic tip and the perfusion suction handpiece and the inner diameter of the perfusion sleeve of the present invention is 0.255 mm, and the flow of the perfusate is Secure the road. The number and diameter of the perfusion ports of this sleeve are the same as in the prior art. This allows the surgeon to shift to a small incision using the same surgical technique as before.

[0005]

[Effect] An ultrasonic tip having a diameter of 0.89 mm is covered with the perfusion sleeve of the present invention, and an ultrasonic tip having a diameter of 0.8 mm is also placed.
It is placed on a 9 mm suction cannula and used as a perfusion suction handpiece. Since the outer diameter of this sleeve is 1.6 mm, the incision wound may be 2.52 mm, but in actuality, it is 2.7 mm considering the gap for leakage of the cooling perfusate and the insertion of the lens injector. The instruments necessary for ultrasonic emulsification and intraocular lens insertion can be inserted and operated through this small incision, and the perfusion rate and leakage amount are almost the same as those of the conventional art.

[0006]

[Example] Outer diameter 1.6 mm, inner diameter 1.4
A silicone rubber is poured into a mold having a diameter of 2 mm and molded. Silicone rubber is hard (elastic) but can secure perfusion rate without being crushed by the wound. When the diameter and the number of the perfusion ports are the same as those of the conventional product, the perfusion flow becomes almost the same. It is easy to manufacture even with stainless steel.

[0007]

According to the present invention, the incision wound in cataract surgery may be a small incision of 2.55 mm to 2.80 mm. The occurrence of postoperative astigmatism is proportional to the length of the incision wound,
In particular, it is said to be remarkably improved when the thickness is 3.2 mm or less. Therefore, a dramatic reduction can be expected. Further, industrially, the outer diameter of the ultrasonic tip is generally 20 gauge, and
One gauge and 22 gauge will be tried. The suction cannula of the perfusion suction handpiece can be used from 20 gauge to 23 gauge. It would be a manufacturing effort goal for a foldable intraocular lens to be insertable within 2.55 mm to 2.8 mm of the wound.

[Brief description of the drawings]

FIG. 1 is an overall external view of a perfusion sleeve according to the present invention.

FIG. 2 is a cross-sectional view of a broken line portion in FIG. 1 as viewed from a perfusion port direction.

Claims (1)

A perfusion having an outer dimension (drawing) of 1.40 mm or more and 1.72 mm or less. 1. A sleeve