High-frequency oscillation in an adult porcine model.

Objective: Controversy exists as to whether high-frequency oscillatory ventilation can be used on babies and small laboratory animals only, or whether high-frequency oscillatory ventilation can also be efficient in the adult patient and large (> 65 kg body weight) laboratory animals. Moreover, controversy exists as to whether limitations in high-frequency oscillation efficiency are caused by the size and shape of the bronchial system, by the lack of low impedant intersegmental gas flow in lung parenchyma, or by inappropriate high-frequency ventilators and ancillary hardware. Therefore, our objective in this study using the adult pig as a model of the adult patient was to test whether the adult airway system is suited to the use of high-frequency oscillatory ventilation or whether there are geometrical, structural, or functional limitations to efficient ventilation by high-frequency oscillation.

[Ventilation by high frequency oscillations in adults. An experimental study of conditions and methods].

A hydraulic pump with an adjustable stroke delivering up to 145 ml at 1 to 45 Hz has been used to ventilate adult pigs of a weight between 60 and 140 kg. After tracheotomy the curarized animals were connected to the pump by a metallic tube through which a bias flow was directed. This flow (FiO2 0.

[Accreditation of educational programs and certification of laboratory and radiology technicians in the United States].

A general view is given of the accreditation of education programs and the certification of laboratory and radiology technicians and of members of the health professions in general. In addition, the functions of the federal government and the professional societies are described in a organizational chart, and the work done by each group participating in the accreditation and certification process is explained. Although a structured academic education is ordinarily required for certification, the agencies charged with it offer different possibilities in which a limited number of academic requirements may be replaced by clinical experience or experience in the field in question.

A computer assisted test assembly system for medical technology examinations.

A descriptive report on the establishment and implementation of a computer assisted test assembly (CATA) system at the University of Iowa Medical Technology Program is presented. This system is an alternative approach to the production of paper and pencil examinations that may be considered for use in other medical technology programs. Access to the system is designed, through coding, to correlate with specific instructional objectives in a variety of subject areas.