JPH03106363A - Body cavity probe - Google Patents

Abstract

PURPOSE:To safety attain processing with easy insertion of a probe made possible, while it is self-propelled, into even a curved pipe cavity by providing an electrode in a required location, where a guide wire and the probe are opposed to each other, so as to form an electrostatic micromotor. CONSTITUTION:A stator electrode 2 of an electrostatic micromotor is provided in the periphery of a guide wire 1. On the other hand, a probe 3 is arranged so as to use the guide wire 1 to serve as the axial core. A point end constitutional part 5, having a rotor electrode 4, is provided in the point end of this probe 3. By using the electrostatic micromotor, when voltage is applied to the stator and rotor electrodes 2 and 4 through the point end constitutional part 5 provided in the point end of the probe 3, the rotor electrode 4 is moved by electrostatic attraction force, and the probe, while it is self-propelled, is advanced along the guide wire 1. Also, since the electrostatic micromotor can be in a small size and installed in accordance with the shape of the probe, any large diameter of the probe is not required.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an intrabody cavity probe for inserting the probe into a body cavity and treating an affected area with various treatment instruments attached to the tip of the probe.

[Conventional technology]

When treating an affected area within a lumen, which is a particularly narrow area within a body cavity, an easy-to-insert guide wire is inserted in advance, and then a probe is inserted along the guide wire. Treatments such as tumor resection are then performed using various treatment instruments provided at the tip of the probe.

[Problem to be solved by the invention]

However, it is still difficult to insert the probe into the lumen when the bent portions are continuous. In other words, although it is possible to insert a hard guidewire, it is difficult to insert a soft probe even along a curved guidewire. In other words, if the probe was forced to be inserted along the guide wire from the proximal side, the probe would become bent at the bent portion, which could even cause damage to the body cavity.

If the probe could not be inserted, there was a problem in that the prescribed treatment had to be abandoned.

The present invention has been proposed to solve the above-mentioned problems, and an object of the present invention is to provide an intrabody cavity probe that allows the probe to be smoothly inserted along a guide wire.

[Means and Actions for Solving the Problems] In order to achieve the above object, the present invention provides an intrabody cavity probe that is inserted along a guide ear that has been inserted in advance into a body cavity. This is a form of electrostatic micromotor by providing a stator on the motor.

Since the electrostatic micromotor is used in this way, the probe can move along the guide wire while moving on its own.

〔Example〕

FIG. 1 shows a first embodiment of the present invention, in which a stator electrode 2 of an electrostatic micromotor, which will be described later, is provided on the outer periphery of a guide wire l. On the other hand, the probe 3 is arranged so that the guide wire 1 is the axis. This probe 3
A tip structure 5 having a rotor electrode 4 is provided at the tip.

FIG. 2 is a sectional view taken along the line AA in FIG. 1, and the stator electrode 2 and rotor electrode 4 are opposed to form an electrostatic micromotor. To explain the driving principle of the electrostatic micromotor according to FIG. 7, the stator 10 has a first insulating layer l3 made of silicon dioxide, silicon nitride, etc. fixed to a silicon semiconductor substrate I2, and this insulating layer l3 A second insulating layer 14 is fixed to the insulating layer 14, and a plurality of electrodes 15 made of aluminum or the like are provided between the insulating layers 13 and 14. on the other hand,
The rotor l1 has a plurality of electrodes 17 between two insulating layers 16.

Then, by making the pitch between the electrodes provided on the stator 1O and the pitch between the electrodes provided on the rotor 11 slightly different, and applying voltage to the electrodes of the rotor 11 in sequence, the electrodes of the stator 10 and rotor 1L are attracted by electrostatic force, and the two Generates a force that moves relatively between the two.

The stator 10 of this electrostatic micromotor is fixed to the outer periphery of the guide wire 1 shown in FIG.
is fixed to the inner periphery of the distal end structure 5 shown in FIG. Then, the stator 10 and the rotor 11 come into contact with each other, forming an electrostatic micromotor.

By using such an electrostatic micromotor,
When a voltage is applied to the stator electrode 2 and the rotor electrode 4 through the tip mechanism 5 provided at the tip of the probe 3, the rotor electrode 4 moves due to electrostatic attraction, and the probe moves on its own while attaching to the guide wire 1. You can enter along. Furthermore, since the electrostatic microphone mower is small and can be provided depending on the form of the probe, the diameter of the probe does not have to be large.

FIG. 3 shows a state in which the guide wire 1 inserted into the aorta from the lower limb reaches the heart, and then the probe 3 is gradually inserted. After inserting the guide wire 1 in this manner, the probe 3 can easily enter the lumen even if the lumen is considerably bent. Therefore, it is not necessary to forcibly push the probe in, so that the prescribed treatment can be performed safely.

FIG. 4 shows a second embodiment of the present invention, in which parts corresponding to those in the first embodiment are given the same reference numerals. This embodiment is applied to a probe having a pavilion 5-knife 7 with a guide hole 6 in the form. A low electrode is provided inside the electrode 5 to form an electrostatic micro-motor.

FIG. 5 shows a state in which the papillotomy knife 7 is inserted into the duodenal papilla via the duodenal fiberscope 8 to perform papillotomy. In this way, by inserting the guide wire 1 into a lumen that is difficult to insert with the Vapiloto ξ-knife 7 alone and inserting the probe by driving the electrostatic micromotor, the purpose can be easily achieved regardless of the bending site. I can do it.

FIG. 6 shows a third embodiment of the present invention, which is an example applied to a heat probe 9 with a balloon.

The drawing shows a case where a heat probe 9 with a balloon is inserted into a bile duct that has been constricted due to cancer, for example, to perform thermal treatment. Guide wire 1 is inserted through the wax hole made in the abdomen.
is inserted, and the balloon-equipped heat probe 9 is inserted via the guide wire 1. When the cancerous part 56 is reached, the hot water in the balloon heated by the heater is used to heat the cancerous part 56 to a required temperature, for example, 43 degrees or higher, thereby causing necrosis of the cancer. Needless to say, the tip structure 5 and the guide wire 1 are provided with electrodes 7J, respectively, to form an electrostatic micromoke.

[Effects of the Invention] As described above, according to the present invention, electrodes are provided at required positions where the guide wire and the probe face each other to form an electrostatic micromotor, so that the probe can be bent while moving on its own. It can also be easily inserted into a lumen. Therefore, the necessary measures can be carried out safely.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing the first embodiment of the present invention, Fig. 2 is a sectional view taken along line A-A of the same, Fig. 3 is an explanatory view showing the state of use, and Fig. 4 is a perspective view showing the first embodiment of the present invention. FIG. 5 is a perspective view showing the second embodiment.
FIG. 6 is an explanatory diagram showing the usage state of the third embodiment of the present invention. FIG. 7 is a sectional view illustrating the driving principle of the electrostatic micromotor. 1... Guide wire 2... Stator electrode 3... Probe 4... Rotor electrode 5... Tip structure or part

Claims (1)

[Claims] 1. In an intrabody cavity treatment probe that has an insertion hole through which a guide wire previously inserted into a body cavity is inserted, and is inserted along the guide wire, a rotor is attached to one of the guide wire and the tip of the intrabody cavity treatment probe, and a rotor is attached to the other. An intrabody cavity probe characterized in that an electrostatic micromotor is formed by providing a stator.