Apparatus for facilitating the performance of medical procedures involving the vascular system of a patient, especially in a critical care environment, such as withdrawal of blood for analysis and infusion of medication. In the taking of a blood sample, blood flows through an arterial catheter connected to an artery of the patient, past a sample station, and then through a venous catheter that brings the blood back to the patient, the various mechanisms being connected by transparent plastic tubes. After a sample is taken, the tubes are flushed through the sample station, arterial catheter, and the venous catheter. Calibration of all pressure transducers requires application of high and low pressures to them, the high pressure being obtained by applying a high pressure (e.g. 200 mm Hg) to a bottle of saline solution which is also utilized to flush the tubes and which is connected to all of the transducers.
An apparatus is provided suitable for use in draining liquid from inside the human body. The apparatus incorporates two reciprocating pumps and a pair of inlet and outlet valves driven by a common linkage system. One pump draws fluid from a reservoir of additive fluid and mixes the additive with the fluid drawn from the body by the second pump. The mixture is discharged to a common collection means. A pressure sensor terminates the pumping if the fluid pressure in the flow path joining the apparatus with the body becomes abnormal. The apparatus may be mounted externally on the body of the patient and may be driven by a portable source of power. Major components may be changed quickly and easily if the flow capacity is to be changed or if a component must be replaced.
Apparatus for infusion and removal of samples of blood and other body fluids comprising a blood connection which is connected via a first line to a sample taking means, a pump connected to the first line, a container connected to the first line via a second line and containing an aqueous fluid, a first shut-off means connected into the second line and a control means for activating the first shut-off means and the pump, the control means switching the shut-off means and the blood pump alternately into fluid supply mode and blood removal mode.
A portable surgical aspirator (10) for use in removing body fat and fluids by drawing same under vacuum through a cannula (52) that is inserted beneath a person's skin performing a liposuction surgical procedure. The aspirator is maintained in a single housing (11) that is caster mounted for ease of movement and includes dual oilless vacuum pumps (15) mounted to opposite ends of an electric motor (14) that can be operated from a manual switch (27) located on the housing or a remote foot switch (65). Pump (15) operation provides, through a single vacuum (18) port, nearly one atmosphere of vacuum within three seconds. The vacuum port (18) is connected through hoses to vacuum bottles (34) and (38) that are for collecting fat and body fluids, passed through tubing from the cannula. The vacuum bottles are maintained in a bottle caddy (56) that is arranged for releasable attachment to the aspirator housing. The aspirator includes a handle (22) that, with the handle ends (23a) and (23 b) secured to the aspirator housing is centrally gripped by an operator for carrying the device, or, with one handle end released, and the handle (22) pivoted around its other end, the released handle end can receive an operator's hand for manually pulling the device rolling on its casters.
Portable apparatus for repeatedly taking samples of blood or other body fluid from a person or animal comprises a housing adapted to be attached to the person or animal from which the samples are to be taken. The housing contains a pump having an inlet connected to a catheter inserted in the body of the person or animal and an outlet connected through a conduit and a multiple position first control valve to a storage receptacle having provision for separately storing a plurality of individual samples. A reservoir for rinsing fluid is connected through a second control valve to the conduit just downstream of the pump. A control system comprising a radio receiver for remote control controls the pump and second control valve to admit body fluid and rinsing fluid alternately to the conduit and controls the first control valve to direct individual samples of body fluid to the storage receptacle and to discharge rinsing fluid from the conduit. The storage receptacle comprises a plurality of small receptacles for individual samples or a continuous tube in which samples are spaced by gas.
In a medical device for sampling fluid, typically blood, two check valves are arranged in series in a fluid sampling line to cause the fluid to flow in one direction and a fluid sampler is connected to the fluid line between the two check valves through an adaptor, thereby preventing the fluid from flowing from the sampler to the inlet of the upstream check valve. The inlet of the upstream check valve is connectable to a plurality of source fluid lines through a switching valve for selective communication.
