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Biomedical subjects

S Lorenzi

Publications and source records attributed to S Lorenzi.

27 records · Page 2Linked to original sources
PubMedDate not supplied

Projection and simulation results of an adaptive fuzzy control module for blood pressure and blood volume during hemodialysis.

This paper proposes a fuzzy logic based procedure able to control the behavior of a patient's blood pressure during a dialysis session, allowing him to reach the planned dry weight. A proportional integrative discrete-time fuzzy control is used to subject the controlled variables (blood pressure and blood volume) to the reference values. Two different tables that refer to pressure and volume errors and rates are consulted and the proposed control actions are taken to obtain the final value (net ultrafiltration rate). A saturation-threshold function of volemia acts on the second control variable, Na concentration in the dialysate. The adaptive control system was simulated on an IBM PC, and rules and terms were expressed by linguistic judgments such as: IF "situation," THEN "action." A pre processor converts the rules into the numerical values in the tables. The obtained simulation results are satisfactory, and the introduction of Na control allows achievement of the target dry weight of the patient with a stable blood pressure.

Adaptation, Physiological↗
PubMedDate not supplied

[Indicators of continuous improvement of the transfer of neonatal emergency cases in the Trento province].

The nursing personnel of the Neonatology Unit of Trento Hospital cares for the transportation of newborns in the Trento Province (more than 7500 transportations have been performed to date). Aim of the study is the evaluation of the quality of care as documented in the ad hoc neonatal transportation data-bank. A further goal is the formulation and validation of simple and easy to collect indicators of "improvement of care". Examples of indicators used to assess the activities of the years 1996 and 1997 were the number of transportations with functioning equipment; the number of newborns with body temperature registered; the number of transportation cards correctly filled out. These simple indicators allowed to identify areas where the quality of care could be improved. The cause-effect diagram used allowed the involvement of all the nursing personnel in the identification of problems and of possible solutions. An example of the process followed for identifying and preventing hypothermia is presented and discussed.

Efficiency, Organizational↗
PubMedDate not supplied

[Training individuals of the construction sector in the province of Bergamo: a shared path division and an operative proposal].

With this presentation it will be introduced the experience of the work group native of Bergamo who is taken care to plan the formation course for the professional figures of system in building. The group is formed from the greater agencies present on the territory, their work is to ensure the protection of the health and the emergency of the workers in the field of the constructions. The objective is to use the formation course in order to diffuse one culture of the emergency. In the specific one they will come to describe the various planning phases of the course of formation for employers that mean to elect himself Responsible of the Service of Prevention and Protection (RSPP).

Humans↗
PubMedDate not supplied

Candida onychomycosis in HIV infection.

Primary nail invasion by Candida is uncommon and almost exclusively seen in patients with an impaired immune function. The appearance of Candida onychomycosis in an adult who is not under immunosuppressive treatment always requires a laboratory evaluation of the immunologic function including HIV assays. We report 2 cases of distal subungual onychomycosis due to Candida sp. in HIV. In one of our patients, the diagnosis of Candida onychomycosis preceded the diagnosis of advanced HIV infection. In both of our patients treatment with systemic antifungals produced complete cure of Candida onychomycosis and the 1 year follow-up did not reveal any relapse of the onychomycosis.

Adult↗