JPS59194733A - Semiconductive laser blood vessel inosculating apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a blood vessel anastomosis device using a semiconductor laser.

(Prior art) Vascular anastomosis performed using a needle and thread is used in neurosurgery, cardiac surgery,
Although this method is widely used in orthopedic surgery, it requires several stitches around a single blood vessel, which often places a large burden and pain on the surgeon and patient. In particular, l+++
In anastomoses of tubules with a diameter of less than mφ, it is unavoidable that the success rate of obtaining a satisfactory result is extremely low. In the case of arterial blood vessel anastomosis using a needle and thread, when blood flow is resumed after the anastomosis, blood leaks from the gap at the junction, and extra measures such as pressing gauze etc. for a while until the leakage subsides is necessary. Time was needed.

In addition, in neurosurgery, etc., the longer the anastomosis time, the longer the time to stop the blood flow, and there was a risk of secondary damage occurring.In contrast, recently, YAG laser or A vascular anastomosis technique using a 1f carbonate laser has been developed. Such vascular anastomosis using light energy utilizes light energy by converting it into heat. In the case of YAG lasers, there have been reports of using a very large output, for example up to about 10 W, but when converting optical energy into thermal energy, the problem lies in the energy density at the irradiated area rather than the total energy beam. becomes. In the case of a carbon dioxide laser, blood vessel anastomosis is performed with only a few tens of mW, and a practical value for the energy density is 3 to 5 J/rrrrn2. FIG. 1 shows the conditions for vascular anastomosis when a carbonic acid laser is used.

45 In the anastomosis possible range with a throat diameter of 0.1 +nriφ, 15 to 35 mW (=equal to the output power).

By the way, in the case of YAG laser light, the wavelength of light (], 00
6μm carbonic acid is 1/10'' compared to that of laser beam
Because of the C laser, the light convergence is essentially good, and since it has the same energy density as a carbon dioxide laser, it is possible to satisfy the anastomosis conditions with a small optical output. If it can output optical energy of about several hundred mJ at a time, it can be used for blood vessel anastomosis. However, it is currently difficult to stably output such a small laser.

On the other hand, the absorption rate of light in biological tissue is 1000 times higher than that of carbon dioxide laser (CBA/YAG laser), which means that the penetration distance of light is shallow, making it convenient for bonding only the surface of blood. . Also, this means that 3 to 5 J
This is because an energy density of /in2 is enough to perform blood vessel anastomosis.

As mentioned above, both YAG lasers and carbon dioxide lasers have their own advantages and disadvantages, but in the case of YAG lasers, since the laser uses a relatively large optical output, the device is very dependent and can be used in any location. Moreover, when the carbon dioxide is a slaser, a more complicated control system is required, and the apparatus itself becomes large.

(Purpose of the Invention) Accordingly, with the recent increase in the output of semiconductor laser devices, the present invention provides a small, simple, and low-cost semiconductor laser vascular anastomosis device using this high-output semiconductor laser device. be. Hereinafter, embodiments will be described in detail with reference to the drawings.

(Embodiment) Fig. 2 shows a first embodiment of the present invention, in which ◯ indicates a power source and a regulator, which is usually composed of a battery and a current regulator. Reference numeral 2 denotes a semiconductor laser element, which is directly driven by the power supply and regulator 1 and emits laser light. In this case, the semiconductor laser device 2 may be a single device or a plurality of devices depending on the required output. 3 is a condensing lens, which condenses the laser light emitted from the semiconductor laser element 2 onto the irradiation site P. 4 is a container for storing these parts,
It is small enough to be held and operated in your hand. In this way, a vascular anastomosis device using a semiconductor laser is an extremely simple 4:l
, l, , and can be constructed in a small size.

FIG. 3 shows an embodiment of the pond according to the present invention, which includes an auxiliary vehicle i1 for long-time irradiation in addition to the embodiment of FIG. A guide 6 is provided to the outside and to keep the laser irradiation conditions constant for the affected area.The guide 6 is rod-shaped or in the shape of
It is equipped with all 7 regulators to allow for ij.

(Effects of the Invention) Semiconductor lasers are currently available with a wide wavelength range of about 05 μm to 32 μm, and therefore, the oscillation wavelength can be arbitrarily selected. Mapco, the optical output is
High-output lasers of about 500 mW have been prototyped, and in particular, semiconductor lasers with a wavelength of 1 μm have a peak output of W order, which has been put into practical use. By using these, an extremely compact vascular anastomosis device can be manufactured at low cost, and since no cooling water is required, it is also possible to configure it as a simple porta-pull device.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the conditions for vascular anastomosis using a carbon dioxide laser, FIG. 2 is a schematic diagram showing the configuration of one embodiment of the present invention, and FIG. 3 is a schematic diagram showing the configuration of another embodiment of the present invention. be. 1... Power source and regulator, 2... Semiconductor laser element,
3... Condensing lens, 4... Container, 5... Auxiliary vehicle 1
Source, 6...Guide. Patent applicant: Tohoku Ricoh Co., Ltd. Chugai Pharmaceutical Co., Ltd.

Claims (1)

[Claims] Equipped with one or more semiconductor laser elements that emit coherent light, with an average output of 1 mW to 300 mW
A semiconductor laser vascular anastomosis characterized by comprising a semiconductor laser emitting means and an optical means for converging the emitted light into a single spot of 0.3 diameter or less depending on the diameter of the blood vessel, nerve, etc. Device.