Abstract: A multicapillary bundle for use in a gas chromatograph. Each of the capillaries in the bundle is formed using a coating solution containing a stationary phase and a solvent. The capillaries are coated with the stationary phase by reducing pressure at a vacuum end of the capillary and creating a moving interface between the coating solution and a film of the stationary phase deposited on each of the capillaries. The reducing pressure at the vacuum end of the capillary and the temperature of the capillary are controlled to maintain motion of the moving interface away from the vacuum end of the capillary. Maintained movement of the interface prevents recoating of the stationary phase. A heating wire and capillaries are embedded in a thermally conductive polymer to create a highly responsive method of heating the multicapillary column. An electronic control device controls the feedback temperature of the multicapillary column using the heating wire.

Abstract: A simulated mechanical respiratory trigger and test lung have been developed. The trigger in one embodiment is capable of triggering a variety of mechanical ventilators to deliver predetermined respiratory rates that simulate a spontaneously breathing patient. This permits the student/health care provider to respond to this spontaneous effort and optimize mechanical ventilator settings. The test lung in an embodiment is capable of varying the simulated patient pulmonary compliance in increments not previously available.