JP2006230754A - Handle fixing mechanism in blood pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mechanism capable of solving problems of conventional technologies wherein a handle can be fixed only when the handle is closed and wherein other parts are necessary even if the handle can be fixed when the handle is opened, and capable of fixing the handle when the handle is opened (in use) for the safer use/operation without being an obstacle in the operation. <P>SOLUTION: The handle fixing mechanism consists of the handle with a groove formed around the rotation axis, a rotor to which the handle is attached, and a ball plunger attached inside the rotor. When a ball of the ball plunger is fitted in the groove in the handle, the handle can be fixed whether the handle is opened or closed. Even when the ball of the plunger is not fitted in the groove in the handle, prescribed constant tension can be applied to the handle. With this mechanism, the handle can be fixed at a more accurate angle with the handle and the ball plunger only, and the position of fixing and the number of positions can be changed by changing the position and the number of grooves. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electric blood pump incorporated in a hemodialysis apparatus used in the treatment of patients with renal insufficiency, etc., in order to continue hemodialysis treatment even in a medical emergency that occurs when the power is turned off. Regarding technology. Furthermore, the blood pump device relates to a blood pump provided with a handle for manual rotation for continuously performing hemodialysis treatment even in a medical emergency, on a part of a rotor that pushes a tube and feeds blood.

This blood pump is a pump that discharges and sucks blood when the rotor between two or more rollers rotates, the clearance between the housings changes, and the pressure in the tube changes. A part of the rotor is a blood pump having a handle for manual rotation for continuing hemodialysis treatment even in a medical emergency.
If the motor suddenly shuts down and the motor becomes inoperable, or if the motor itself cannot operate, even in a medical emergency, assuming that the hemodialysis treatment will continue, human power only However, it relates to a blood pump that is considered to be able to continue artificial dialysis treatment.

When performing hemodialysis treatment under normal normal conditions, the blood pump does not rotate the rotor using the handle. However, if the hemodialysis machine stops in an emergency (power failure, etc.), it must be returned to the patient's body before the blood in the tube has solidified.
In anticipation of such a medical emergency, a blood pump with a manual handle built into the rotor of the blood pump, the doctor or nurse (or patient) pulls out the manual handle from the rotor in an emergency. Rotate the rotor and continue medical treatment. Therefore, a manual handle is used.
Since the blood pump incorporated in the hemodialysis apparatus is mounted in the vertical direction with respect to the apparatus, it is horizontal with respect to gravity. When hemodialysis treatment is performed in a normal state, a fixing mechanism that does not open the handle naturally is indispensable while using the hemodialysis apparatus.

In the prior art, a method of fixing using a magnet or rubber is used, and the manual handle can be fixed only when it is closed. Also, with the method of fixing using leaf springs, it is possible to fix even when the handle is opened, but in order to determine a fixed angle to be fixed, pressure fixing by screws or contact with other parts Was needed.

In the conventional method as described above, the handle cannot be easily fixed when the handle is opened. In addition, other parts that turn the screw are necessary for determining the angle. Furthermore, in order to operate more safely, fixing when opened (during operation) was necessary.
For use in an emergency, the operation must be as easy and simple as possible. Furthermore, it is preferable not to disturb the operation.

  In order to solve the above-mentioned problem, two notch grooves are provided in the vicinity of the rotating shaft of the handle, and the portion and the spherical tip protrude from the fixed object, and the spherical tip is pushed by a springy one, It has a mechanism that is fixed by an object that can enter (for example, a brand name ball plunger). The structure is such that the handle can be fixed both when the handle is opened and when it is closed by two notch grooves near the rotation axis of the handle.

In the above structure according to the present invention, the handle provided with the groove, the rotor to which the handle is attached, and the spherical tip attached in the rotor protrude from the fixed object, and the spherical tip has a spring property and is pushed. It is configured by being fixed with an object that can enter (for example, a brand name ball plunger).
For example, when a ball of a product name ball plunger is fitted in the groove of the handle, it can be fixed both when the handle is opened and closed. Further, for example, even when the ball of the product name ball plunger is not in the groove of the handle, it is possible to always apply a certain tension to the handle.
In addition to the handle and, for example, the product name ball plunger, it is possible to fix at a more accurate angle, and by changing the position and number of the grooves, the fixing location and the number of locations can be changed.

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

FIG. 2 shows the structure of the present invention.
When the handle 4 is closed, it is fixed in the seven grooves of the handle 4 by the spring force of the product name ball plunger 6 in the rotor 5.

  While the handle 4 is open, the handle 4 is not fixed because there is no groove in the handle 4, but the handle 4 is constantly receiving a spring force, and thus receives a certain force.

  When the handle 4 is opened to a predetermined angle, it is fixed in the eight grooves of the handle 4 by the spring force of, for example, a trade name ball plunger 6 in the rotor 5.

  This is not limited to emergency medical devices, but can be applied to what is expected that manual operation must continue without power being turned off or being turned off depending on the situation, such as emergency lifesaving devices.

1 shows the structure of the present invention. The structural example of a prior art is shown. The example of a fixed part of the structure of this invention is shown.

Explanation of symbols

1 Magnet 2 Rubber 3 Leaf Spring 4 Handle 5 Rotor 6 Ball Plunger 7 Handle Groove 1
8 Handle groove 2

Claims (1)

By rotating the rotating head with an electric motor, rolling a plurality of rollers provided on the rotating head on the elastic tube with which the peripheral surface of the roller contacts, and squeezing the elastic tube with the roller In the blood pump for transporting the liquid in the elastic tube,
A handle for manual rotation is provided at the center of the rotary head, and the handle is stored in the rotary head when in use, and the motor that rotates the rotary head can rotate when the power is turned off. In a medical emergency when the blood pump is equipped with a handle for manual rotation,
The handle can be fixed in the closed state and in the open state. A part of the handle is notched to fix the handle in the closed state and the open state, and the part and the spherical tip protrude from the fixed object, and the spherical tip is springy. An infusion pump characterized by being fixed by an object (for example, a brand name ball plunger) that can be pushed in and inserted.