JPH0446729Y2 - - Google Patents

Description

[Detailed description of the invention] [Summary] A probe that measures blood flow by holding a blood vessel between the locking part at the tip of the holder and the sensor at the tip of the slider built into the holder. The handle is bent to allow easy capture and measurement of blood vessels deep inside organs, and the back of the bent part has a window hole for inserting and removing the slider, making it easy to disassemble and clean the probe. Do it like this.

[Industrial application field]

Recent improvements in blood vessel suturing techniques have made it possible to perform so-called bypass surgery, in which blood vessels at other locations are sutured on both sides of a narrowed portion of a coronary artery of the heart. In other words, the stopped blood flow is restored by flowing blood through the sutured bypass blood vessels, but at this time, it is necessary to examine the blood flow in the sutured bypass blood vessels in order to determine the success or failure of the surgery. is necessary.

The mainstream method of blood flow testing is to press an acoustic sensor against a blood vessel and measure blood flow using the ultrasonic Doppler effect. The present invention relates to a probe for measuring blood flow by pressing an acoustic sensor against a blood vessel.

[Prior Art] FIG. 4 is a partially cutaway perspective view showing a conventional Doppler blood flow meter probe. A holder part 2 is formed integrally and linearly at the tip of the handle 1, and a slider 3 is slidably built into the holder part 2. The tip of the slider 3 is formed into a concave curved surface so as to fit around the outer periphery of the blood vessel, and an acoustic sensor 5 built into the slider 3 is attached to the concave curved surface 4.
The tip is exposed. At the tip of the holder,
An arc-shaped blood vessel locking portion 6 that is folded back toward the sensor 5 is integrally formed. From holder 2 to handle 1
A slit 7 is formed up to the end of the slider 3, and a knob 8 of the slider 3 protrudes from the slit 7. In addition, the cable 9 connected to the sensor 5 is
It is inserted into a rectangular guide hole in the holder part 2 and the handle 1, and is pulled out from the rear opening 10.

When the handle 1 is held in the hand and the knob 8 is operated with the fingertip, the slider 3 slides in the direction of the slit 7, so that the distance between the concave curved surface 4 at the tip of the slider and the concave curved surface of the blood vessel locking part 6 changes. FIG. 5 is a side view showing the state of use of this blood flow meter probe.
Reference numeral 11 indicates the heart, and reference numeral 12 indicates the ribs.When measuring blood flow, hold the handle 1 in your hand and first touch the ribs 11 and 1.
The holder part 2 is inserted between the holder parts 1 and 1, and the blood vessel locking part 6 at the tip of the holder part is hooked onto the sutured bypass blood vessel 13 on the surface of the heart 11. Next, the slider 3 is moved toward the blood vessel locking portion 6 by operating the knob 8, and the bypass blood vessel 13 is sandwiched between the blood vessel locking portion 6 and the concave curved surface 4 at the tip of the slider. In this way, the tip of the sensor is brought into contact with the bypass blood vessel 13. Blood movement is then detected by the Doppler effect, and a detection signal is sent to the signal processing section via cable 9.

[Problem that the invention attempts to solve]

By the way, the heart 11 has a swollen shape as shown by the broken line 11a, but when a blood flow meter probe is inserted to measure the blood flow in the bypass blood vessel 13, the heart 11 must be compressed, and the measurement cannot be performed. is difficult. Particularly during surgery, in order to make the thoracotomy area as small as possible, the sutured bypass vessels are not always exposed on the front side of the heart.
Sometimes it is hidden behind 1. Even in such cases, it is necessary that the probe be able to reach the back side of the heart. However, with the conventional blood flow meter probe as shown in FIG. 4, measurement cannot be performed unless the heart 11 is compressed.

The technical problem of the present invention is to solve these problems with conventional blood flow meter probes and to make it possible to easily capture and measure even blood vessels located deep inside without putting pressure on organs.

[Means for solving problems]

FIG. 1 is a sectional view illustrating the basic principle of a blood flow meter probe according to the present invention. 14 is a holder part;
15 is a handle, and the handle 1 is attached to the holder part 14.
5 is bent at an obtuse angle, forming an F-shape. The holder part 14 has a built-in slider 3 having a sensor 5 as in the conventional case. A holder portion 1 is provided on the back near the bent portion 16.
A slider entry/exit opening 17 that opens on an extension of the slider storage hole 18 of No. 4 is provided.

[Effect]

Since the handle 15 is bent in a V-shape with respect to the holder part 14, the heart can escape through the bent part 16, and the blood vessels in the deep part can be locked with the sensor without putting pressure on the heart. Blood flow can be measured by inserting it between the part 6 and the part 6. The slider 3 is operated by pushing the knob 8 protruding from the slit 22 on the back of the holder part 14 back and forth with a finger. In addition, an opening 17 for inserting and removing the slider is provided at the back of the bent portion 16.
Therefore, after use, the slider 3 is pulled out from the opening 17, and after cleaning, the slider 3 is inserted again into the holder portion 14 through the opening 17 for use.

Note that when inserting the slider 3 and the cable 9, the slider 3 is first inserted through the inlet/outlet 17 and moved to the tip of the holder part 14 as shown in the figure. Next, the tip of the cable 9 is inserted through the opening 17 and pushed toward the opening 19 at the end of the handle. In addition, when disassembling, first pull out the cable 9 from the access port 17, and then pull out the slider 3 from the access port 17.

〔Example〕

Next, how the blood flow meter probe according to the present invention is actually implemented will be explained using examples. Second
The figure is a partially cutaway perspective view showing an embodiment of the blood flow meter probe according to the present invention. Holder part 14 and handle 1
5 is bent in a V-shape, and a slider inlet/outlet 17 is formed near the back of the bent portion 16 and opens on an extension of the slider guide hole 18 of the holder portion 14. The tip of the sensor 5 is exposed at the tip of the slider 3, and the measurement is performed by holding the blood vessel between it and the locking portion 6 formed at the tip of the holder portion 14, as in the conventional method. sensor 5
The signal extraction cable 9 passes through the slider guide hole 18 and the handle 15 and is pulled out from the end opening 19. In FIG. 1, the handle 15 has a cylindrical shape, but in this embodiment, a slit 20 is formed between the access port 17 and the opening 19 over the entire length of the handle 15. Therefore, the cable 9 can be taken in and taken out through the slit 20, and the slider 3 can only be put in and taken out from the inlet/outlet 17, which facilitates disassembly and assembly.

Note that the holder portion 14, handle 15, slider 3, etc. are molded from synthetic resin or the like. In FIGS. 1 and 2, the handle 15 is bent to the side opposite to the blood vessel insertion port 21, but the third
As shown in the figure, it may be bent toward the blood vessel insertion port 21 side.

FIG. 3 is a side view showing the state of use of this blood flow meter probe. To insert the blood flow meter probe into the body, as shown in the figure, the inside of the bend 16 must be aligned with the heart 1.
Make it face 1 side. Then, with the bypass blood vessel 13 hooked by the blood vessel locking part 6 at the tip,
The slider 3 is moved toward the locking portion 6 using the knob 8, and the bypass blood vessel 13 is sandwiched therebetween. When the blood vessel is held in this way, the tip of the sensor 5 will be attached to the blood vessel 13.
The detection signal is sent to the outside via cable 9.

[Effect of idea]

As described above, according to the present invention, since the handle 15 has a curved shape with respect to the holder part 14 that houses the slider 3 having the sensor 5,
The target blood vessels can be easily captured and measured without putting pressure on internal organs. Also, the bent portion 16
Since the slider 3 can be taken in and taken out from the entrance 17 opened in the back of the device, it can be disassembled and cleaned after use, and then reassembled for use, making it easy to handle.

[Brief explanation of drawings]

FIG. 1 is a sectional view illustrating the basic principle of the blood flow meter probe according to the present invention, FIG. 2 is a partially cutaway perspective view showing an embodiment of the blood flow meter probe according to the present invention, and FIG.
The figure is a side view showing how the blood flow meter probe according to the embodiment is used, FIG. 4 is a partially cutaway perspective view of the conventional blood flow meter probe, and FIG. 5 is a side view showing how the blood flow meter probe is used. It is a diagram. In the figure, 3 is a slider, 5 is a sensor, and 6 is a slider.
is the (blood vessel) locking part, 8 is the knob, 9 is the cable,
11 is a heart, 13 is a blood vessel, 14 is a holder part, 1
5 is a handle, 16 is a bent portion, 17 is a slider opening and exit, and 20 and 22 are slits.

Claims (1)

[Claims for Utility Model Registration] A holder part 14 that slidably incorporates a slider 3 having a sensor 5 at its tip, and an arc-shaped blood vessel folded back toward the sensor 5 at the tip of the holder part 14. It has a stop part 6 and a handle part 15 bent at an obtuse angle with the holder part 14, and at the back of the bent part 16, on an extension of the guide hole 18 of the slider, a window hole 17 for putting in and taking out the slider is provided. A blood flow meter probe characterized in that: is opened.