Abstract: This stopcock flow path switching device includes: a three-way stopcock having a flow path switching cock and provided to, by switching of the flow path switching cock, allow flow path switching between a state in which a contrast agent introducing flow path is formed by coupling a flow path on the patient side to a flow path on the injector head side and a state in which a blood pressure measuring flow path is formed by coupling the flow path on the patient side to a flow path on the blood pressure transducer side; and a clamp mechanism for closing the flow path of the three-way stopcock communicating with the injector head side, in the state in which the blood pressure measuring flow path is formed.

Abstract: An injector head with rotation mechanism allows selection between a state in which a syringe assumes a priming orientation with a through hole of the syringe positioned upper than the injector head body, and a state in which the syringe assumes a contrast agent injectable orientation with the through hole of the syringe positioned lower than the injector head body.

Abstract: In the joint mechanism, when connecting a plunger to a piston, after engaging members of a plunger-side engaging region in a retracted state pass through a first engaging wall region of a piston-side engaging region, the engaging members of the plunger-side engaging region come into a projected state in a second engaging wall region and the projected state of the engaging members is fastened by a fast block, and thereby, the plunger-side engaging region engages with the piston-side engaging region.

Abstract: The priming method includes the steps of: in a state where a contrast agent bag containing a contrast agent is coupled to a second tube moving a second piston in a second syringe backward to introduce the contrast agent to the second syringe, and with a first tube kept open, moving the second piston in the second syringe forward to discharge air in the second syringe to the outside and to fill the first tube with contrast agent.

Abstract: This stopcock flow path switching device includes: a three-way stopcock having a flow path switching cock and provided to, by switching of the flow path switching cock, allow flow path switching between a state in which a contrast agent introducing flow path is formed by coupling a flow path on the patient side to a flow path on the injector head side and a state in which a blood pressure measuring flow path is formed by coupling the flow path on the patient side to a flow path on the blood pressure transducer side; and a clamp mechanism for closing the flow path of the three-way stopcock communicating with the injector head side, in the state in which the blood pressure measuring flow path is formed.

Abstract: The priming method includes the steps of: in a state where a contrast agent bag containing a contrast agent is coupled to a second tube moving a second piston in a second syringe backward to introduce the contrast agent to the second syringe, and with a first tube kept open, moving the second piston in the second syringe forward to discharge air in the second syringe to the outside and to fill the first tube with contrast agent.

Abstract: An injector head with rotation mechanism allows selection between a state in which a syringe assumes a priming orientation with a through hole of the syringe positioned upper than the injector head body, and a state in which the syringe assumes a contrast agent injectable orientation with the through hole of the syringe positioned lower than the injector head body.

Abstract: In a valve-equipped hand switch and a chemical liquid introduction system, a contrast medium in a syringe is delivered to a patient line through a first port, a main passage around a spacer portion, and a second port. Furthermore, a pressure (about 300 psi) of the contrast medium delivered by a chemical liquid introduction device is transmitted as a reaction force through a third plunger from a handle portion of an operation piston held by an operator. As such, the operator can directly feel the pressure of the introduced contrast medium, which gives a sense of ease to the operator during operation.

Abstract: In the joint mechanism, when connecting a plunger to a piston, after engaging members of a plunger-side engaging region in a retracted state pass through a first engaging wall region of a piston-side engaging region, the engaging members of the plunger-side engaging region come into a projected state in a second engaging wall region and the projected state of the engaging members is fastened by a fast block, and thereby, the plunger-side engaging region engages with the piston-side engaging region.

Abstract: In a valve-equipped hand switch and a chemical liquid introduction system, a contrast medium in a syringe is delivered to a patient line through a first port, a main passage around a spacer portion, and a second port. Furthermore, a pressure (about 300 psi) of the contrast medium delivered by a chemical liquid introduction device is transmitted as a reaction force through a third plunger from a handle portion of an operation piston held by an operator. As such, the operator can directly feel the pressure of the introduced contrast medium, which gives a sense of ease to the operator during operation.

Abstract: At the insertion movement of plunger member in cylinder member, a photosensor is in the position of sensing the movement of slit area. As a result, when the plunger member is pressed inward by an operator, light transmission zones and light shielding zones alternately provided in the slit area are sensed by the photosensor. Accordingly, there can be provided a syringe-like hand switch such that in the chemical introduction control of injector head for injection of chemicals, such as a contrast medium, in patients, both parameters for injection speed and injection quantity can be controlled by the senses at use of conventional syringes.

Abstract: This channel switching apparatus comprises a first channel switching device (303) for switching a first main channel and a second main channel, a second channel switching device (305) for switching a third main channel and a fourth main channel, a third channel switching device (307) for switching a fifth main channel and a sixth main channel, and a fourth channel switching device (308) for switching a seventh main channel and an eighth main channel. Thus, a channel switching apparatus which can readily and correctly perform even by touch can be provided.

Abstract: An auxiliary appliance for syringe fixation according to the present invention comprises a syringe adaptor for fixing a flange part of a syringe to an injection head, and a piston adaptor for connecting a piston to a plunger. Thus, it is possible to attach a syringe, having a different shape from a syringe which can be directly mounted on the injection head, to the injection head.

Abstract: An injector head for medical use is provided with a tilt sense circuit between a switch circuit and a body control unit for sensing a tilt of the injector head, converting a signal output from the switch circuit to a prescribed signal and outputting it to the body control unit. Accordingly, an injector head is provided which can be operated without care at the time of injection of contrast medium into a patient.

Abstract: A probe for measuring epidural pressure and the elasticity of brain parenchyma includes first and second chambers both formed of a thin film with a bag-shape so that they can contract/expand in response to introduction of first and second pressure transmission mediums, respectively, wherein the first and second chambers are independent of each other and provided in a stack. Thus a probe capable of accurately measuring epidural pressure and the elasticity of brain parenchyma can be provided.

Abstract: An injector head for medical use is provided with a position plate serving as both the position plate and a nut, placed at a rear end portion of a plunger, as well as a screw axis engaging with the position plate. A mechanical stopper which can slide only in a direction of an axis of the plunger is provided to the plunger. A female thread is formed on the surface of the mechanical stopper. A main body portion is provided which accommodates the mechanical stopper, the plunger, and the position plate and has a male thread formed on its inner surface and screwed together with the female thread. By utilizing this structure, an injector head for medical use can be provided which is scaled down and simplified while keeping its mechanical safety mechanism.

Abstract: In a stand for medical instruments according to the present invention, a first coefficient of friction adapted between an outer circumferential surface of a sliding column and an inner circumferential surface of a bush is adapted to be smaller than a second coefficient of friction caused between an outer circumferential surface of the bush and an inner circumferential surface of a main pipe. This allows a stand for medical instruments which improves operationality.

Abstract: A ligative suturer according to the present invention comprises a first rod which is connected with a ligative sutural member, and a second rod which is connected with the first rod to be bendable in the horizontal direction (L, R). A thread guard member which is capable of protrusion and storage is provided in the first rod, while a lever which can select the bending direction of the first rod in response to the situation of employment by an operator is provided in the second rod. Due to this ligative suturer, the operator can regularly bend the first rod toward him whether he handles the suturer with his left or right hand.