JPH0247961Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is an injector that uses a mechanical drive to automatically inject and pause an enema solution such as Ba in accordance with the intestinal pressure. The present invention relates to an enema device, and particularly provides an enema device in which the maximum value of injection pressure can be arbitrarily adjusted.

(Conventional technology) Conventionally, to inject imaging agents such as Ba solution required for enema examination into the intestines, the inligator method using natural falling or the compressing of the container filled with drug solution while pushing out the rod using a motor drive. There were methods such as injecting a medicinal solution into the intestines.

In addition, as this type of injection device,
There is an automatic contrast agent injection device described in Publication No. 157113.
In this system, a screw shaft is rotated by a motor, and as the screw shaft rotates, a pusher screwed onto the screw shaft is moved forward and backward to pressurize the syringe and pour out the contrast medium inside the syringe. Furthermore, when the injection reaction force exceeds a set value, the screw shaft is moved and a limit switch is activated to stop the motor.

(Problems to be Solved by the Invention) However, the Irligator method requires a high degree of skill in the procedure, and the preparations, equipment, etc. are complicated.

In addition, with a motor-driven enema device, it is not possible to control the enema device while detecting intestinal pressure, and the maximum value of intestinal pressure varies depending on gender, age, etc. Since it was not possible to make adjustments accordingly, the device would operate regardless of the intestinal pressure, resulting in the problem of relying on intuition and experience when injecting. In addition, in the contrast agent injection device described in Japanese Utility Model Application Publication No. 58-157113, the screw shaft is rotated to advance and retreat the presser, so the advancing and retreating speed is slow, the structure is complicated, and the setting limit value of the injection reaction force is difficult to set. There is also a problem in that it cannot be done with high precision because it requires adjustment of a spring that acts in a direction perpendicular to the screw axis.

The problem of this invention is to solve such conventional problems,
An enema device that can adjust the enema pressure to the desired maximum value of the intestinal pressure, and automatically stops the electric motor and stops injecting the medicinal solution when the intestinal pressure exceeds the set value. Our goal is to provide the following.

(Means for solving the problem) The gist of the present invention that solves the problem is that a rod for compressing an expandable container filled with an enema drug solution is slidably supported on a machine frame, and the rod is slidable on the rod. an electric drive device that is movably held and drives the rod, and a spring that urges the drive device toward the container side and abuts against a stopper provided on the machine frame;
In addition, a receiving plate for holding the opposite side of the spring to the drive device is provided so as to be movable in the direction of the rod axis, and a screw shaft for adjusting the spring biasing force for advancing and retracting the receiving plate is screwed into the machine frame, and the drive device and the stopper plate are screwed together. A movement detector is provided to detect when the drive device is separated from the stopper due to loss of contact with the stopper, and a separation detection signal from the movement detector causes the power supply to the drive device to be stopped. It is in the enema device.

Here, the movement detector is usually a limit switch, but is not limited to this. Further, it may be provided at any position on the drive device side, at the stopper or in the machine frame near the stopper, as long as it can detect separation from the drive device stopper.

(Function) In the present invention, when not in use, the drive device is always biased by the spring and in contact with the stopper. When administering an enema, power is supplied to the drive device to operate it. When the drive device operates, the rod is sent toward the container, and the tip of the rod presses against the container, compressing the container and discharging the medicinal solution inside into the intestine.
At the start of enema, the intestinal pressure is not high and the reaction force from the container that the rod receives is smaller than the biasing force of the spring, and the drive device sends only the rod toward the container while in contact with the stopper. As the enema of the medicinal solution progresses and the intestinal pressure increases and reaches a predetermined intestinal pressure, the container becomes difficult to be compressed and deformed, and the reaction force from the container becomes greater than the biasing force of the spring, and the drive device compresses the spring. while moving away from the victim. When the drive device moves a predetermined distance away from the stopper, a movement detector is activated to stop the power supply to the drive device and the enema is discontinued. Adjustment of the set value of the intestinal pressure at which the enema is to be stopped is accomplished by rotating a screw shaft screwed onto the machine frame, which moves the screw shaft forward and backward in the direction of the rod axis, changing the position of the receiving plate.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

The enema device 1 of this embodiment includes a rod 2, a drive device 3 using a geared motor, a movement detector 4 using a limit switch attached to the drive device 3, a spring 5, a machine frame 6, a container 7, a machine frame 6 The main components are a stopper 8, a screw shaft 19, and a receiving plate 17, which form part of the main body.

The rod 2 is provided with a rack 9 over almost its entire length, a circular container pressing portion 10 is provided at the tip, and the rod 2 is rotatably supported on the machine frame 6 by bearings 11, 11.

Further, the drive device 3 is provided with a pinion 13 via a speed reducer incorporated in the motor casing 12, and a bearing 15 is provided in a direction perpendicular to the motor shaft 14. Then, the rod 2 is connected to the bearing 15.
The pinion 13 is engaged with the rack 9, and the drive device 3 is pivotally supported by the rod 2, and the drive device 3 is attached to the stopper 8 side by the spring 5 provided between the machine frame 6 and the motor casing 12. I force them into contact. Further, the repulsive force of the spring 5 is set within a range that can sufficiently cover the maximum allowable intestinal pressure.

Next, the present enema device 1 is equipped with a biasing force adjustment mechanism 16 for the spring 5. This adjustment mechanism 1
6, the rod 2 is provided on the opposite side of the machine frame 6. 17 is a receiving plate movably inserted into the inner part of the machine frame of the rod 2, 18 is a screw hole provided in the machine frame 6,
A screw shaft 19 is screwed into the screw hole 18, and its tip is rotatably connected to the receiving plate 17. This receiving plate 17 is brought into contact with the spring 5 on the side opposite to the driving device. Also, 20 is the same threaded shaft 1
9 as an adjustment means, a mark 21 engraved around the entire circumference of the screw shaft protruding outside the machine frame, and a scale 22 fixed to the machine frame as a measuring device.
It is equipped with This scale 22 is graduated so that the repulsive force of the spring 5 can sufficiently cover the range from zero to the range in which the limit switch operates at the expected maximum value of the intestinal pressure.

The movement detector 4 is attached to the motor casing 12, and when the drive device 3 is brought into contact with the stopper 8, the lever 23 of the movement detector 4 is brought into contact with the stopper 8 to turn off the power supply circuit of the drive device 3. It is provided to open the power supply circuit when the lever 23 is closed or separated from the stopper 8.

In addition, 24 in FIG. 5 is a contact point of the limit switch 4, and 25 is a main switch.

The enema device 1 of this embodiment is configured as described above, and the container 7 filled with a medicinal solution is inserted and fixed between the machine frame 6 and the container pressing part 10. At this time, insert a screwdriver or the like into the slot 20 and rotate the screw shaft 19 to move the receiving plate 17 back and forth in the axial direction of the rod 2, so that the spring 5 Adjust the biasing force.

Then, one of the catheters is inserted into the patient's rectum, the other is connected to the container 7, and the driving device 3 is energized to drive the pinion 13 to push the rod 2 toward the container 7. In this case, when the intestinal pressure of the patient is smaller than the pressure caused by the spring 5, the drive device 3 is brought into contact with the stopper 8 by the spring 5, and the driving force of the drive device 3 compresses the container 7 while pushing out the rod 2. It acts like injecting a chemical solution into the town.

In addition, if there is a disease in the intestine, the medicinal solution cannot be injected smoothly, and the medicinal solution stagnates, causing the pressure in the intestine to increase.
When the pressure becomes greater than the pressure, the rod 2 stops moving in the driving direction of the drive device 3, so the driving force of the drive device 3 is transferred to the drive device 3 by the pinion 13 rolling on the rack 9 and pressing the spring 5. It acts to move itself. At this time, the movement detector 4 attached to the motor casing 12
The lever 23 is separated from the stopper 8 and immediately stops the drive device 3 and stops the injection, thereby protecting the intestines.

When the drive device 3 is stopped, the medicinal solution gradually flows into the intestines and the pressure in the container 7 decreases, and the drive device 3 returns to the original stopper 8 and brings the lever 23 of the movement detector 4 into contact with the stopper 8. The drive device 3 is driven again to restart the injection.

This injection and stop are repeated, and when the intestinal pressure reaches its maximum value, the spring does not return to its original state due to balance, and the device completely stops, ending the injection.

This enema device 1 constantly compares the intestinal pressure with the pressure generated by the spring 5, and can adjust the injection pressure of the device to the maximum value of the arbitrary intestinal pressure with a single touch, and is activated as the intestinal pressure increases. Since the device automatically stops, it is easy to operate and can be operated reliably without erroneous operation, so the intestines can be safely protected.

Although the embodiment of the present invention has been described above with reference to the drawings, the specific configuration of the present invention is not limited to this embodiment, and design changes may be made without departing from the gist of the present invention. It is included in the technical scope of the present invention.

For example, the movement detector 4 is connected to the motor casing 12
Although the spring 5 is used to bias the drive device 3 toward the container 7, the drive device 3 may be mounted on the machine frame side, but the spring 5 is not limited to this, and a leaf spring or the like may be used instead. Good too. Moreover, a knob may be used as the adjusting means for the screw shaft instead of the slot.

(Effects of the device) As described above, by having the configuration of the present invention with the above features, the injection pressure can be adjusted according to the maximum value of the patient's intestinal pressure, and the intestinal pressure is constantly compared with the pressure generated by the spring. while injecting the drug solution into the intestines,
If the intestinal pressure becomes greater than the pressure caused by the spring, the drive device can be stopped immediately.The intestinal pressure can be sensed through a normal catheter, so there is no unnecessary burden on the patient, and the operation is simple, so it is safe. It can be carried out reliably.

[Brief explanation of the drawing]

Fig. 1 is an explanatory plan view showing the enema device according to the embodiment of the present invention, Fig. 2 is an explanatory view showing the state during the infusion, and Fig. 3 shows the state in which the intestine pressure has increased and the infusion has been stopped. FIG. 4 is an explanatory diagram of the adjustment mechanism, and FIG. 5 is an explanatory diagram showing the state of connection of the intestinal injection device. 1: Enema device, 2: Rod, 3: Drive device,
4: Movement detector, 5: Spring, 6: Machine frame,
7: Container, 8: Stopper, 16: Adjustment mechanism, 1
7: Receiving plate, 18: Screw hole, 19: Screw shaft, 2
0: Suriwari, 21: Mark, 22: Scale.

Claims (1)

[Scope of utility model registration request] A rod for compressing an expandable container filled with an enema drug solution is slidably supported on a machine frame, and an electric drive device is provided that is slidably held on the rod and drives the rod. A spring is provided that urges the drive device toward the container side and abuts against a stopper provided on the machine frame, and a receiving plate that holds the side of the spring opposite to the drive device is provided so as to be movable back and forth in the direction of the rod axis,
A screw shaft for adjusting the spring biasing force that moves the receiving plate forward and backward is screwed into the machine frame, and movement detection is performed to detect when the drive device is out of contact with the stopper and the drive device is separated from the stopper. What is claimed is: 1. An enema device, characterized in that the enema device is provided with a movement detector, and the power supply to the drive device is stopped in response to a separation detection signal from the movement detector.