A liquid injector for medical respirators in which a predetermined quantity of patient gas is stored at higher than atmospheric pressure in a known volume during an expiratory period of a respiratory cycle and discharged to a patient during the next following inspiratory period of the cycle. The injector includes a movable member the displacement of which from a datum position controls the quantity of liquid injected into the patient gas in each cycle. This displacement is directly proportional ...

A liquid injector for use in a medical respirator having a cylinder mounted for movement within a cavity. The cavity has a supply of liquid thereto and as the cylinder moves therethrough, it entraps a quantity of liquid within the cylinder at the point when it is sealed against a closure within the cavity. A member is mounted for movement within the cylinder so that when the cylinder is moved against the closure, the member will be forced to move so as to eject the liquid entrapped therein into ...

A medical respirator having switching means to control flow of patient gas from a pressure source through a control means into a variable volume during an expiration period of the respirator and from the variable volume to the patient through restrictive means during an inspiration period. The gas container is divided into two volumes by a movable member, the first volume being variable and the ratio of volumes varying with the position of the movable member. Gas for the patient is expelled from...

An electrode for attachment to the skin includes a pad of foamed material soaked with electrode jelly positioned in a low profile cup member and engaging an electrical conductor at the base of the cup member. Because the pad is wetted by the jelly, it adheres to the cup member and conductor. The cup member and soaked pad are protected by a cover, a projecting portion of which engages and holds the pad in the cup member. The area of the projecting portion engaging the pad has a relatively small a...

A medical respirator in which gas is stored and passed to a patient in an adjustable predetermined time having switch means to control the flow of gas from a pressure source into a variable volume during the expiration period of the respirator and from the variable volume to the patient through restrictive means during inspiration period. The gas container is divided into two volumes separated by a movable member. Gas for the patient is expelled from the first volume, which is variable, by decre...

A medical device is disclosed, which employs a form of electric desensitization in connection with the use of pain-producing medical tools. The device is particularly useful in connection with dental drilling operations and includes, in the preferred embodiment, a coil mounted within a dental handpiece and a rotating permanent magnet mounted so that its magnetic flux overlaps the coil windings. Rotation of the magnet induces an electric current in the coil which flows through the drill and into ...

A combination of disposable medical instruments is provided which can be used when performing an abortion including a speculum comprising metal jaw members and disposable plastic tip members. The plastic tip members are fitted on the jaw members in snap-fit relationship and are shaped so that they adequately expose the cervix and tend to bring it forward toward the vaginal opening. A disposable curette or cannula for a suction aspirator is also provided and comprises a tube of plastic material w...

Apparatus for intubation within body passages, comprising an elongated tube having the usual opening at the distal end and means for connection to a source of fluid, such as air, at the other end. Occlusion means is located about the surface of the tube near the open end to seal the space between the passage and the tube against flow of air. The occlusion means comprises a bag or canopy secured at its center, to the outer surface of the tube and terminating in a free edge directed toward the dis...

A stretcher including means which facilitates the transfer of a patient between a bed and the stretcher is disclosed. The stretcher includes actuators for controlling the vertical position of the appliance and also for imparting angular movement to transfer means which can be extended from the appliance. Additionally, the device may be provided with further actuators which are employed to convert the stretcher into a wheel chair by rotating back and foot support platforms relative to a central s...

A humidifier for use with a medical respirator having a hot plate type of heating unit entirely separable from a water reservoir which heats the water within the reservoir. The reservoir is provided with an inlet for receiving gas from the respirator and an outlet for delivering heated humidified gas to a patient and a bubble chamber partially submersed in the heated water intermediate the inlet and the outlet and which forms tiny discrete bubbles to be expelled through the water to humidify the...