PubMed Health⌕ Search

Biomedical subjects

L Pizzo

Publications and source records attributed to L Pizzo.

9 recordsLinked to original sources

[Microbiological evaluation of two different disinfection protocols of a new hemodialysis monitor with an ultrafilter].

BACKGROUND: Hemodialysis monitors represent a frequent site for bacterial contamination. METHODS: Two different disinfection protocols on a new device (Formula(R), Bellco) have been compared: only chemical or chemical plus heat disinfection by means of CFU, and LAL test. The endotoxin removing capacity of ultrafilter was tested with varying lipopolysaccharide concentrations. RESULTS: Similar results were obtained with heat disinfection compared to chemical disinfection (CFU and LAL test). The LAL test (chromogenic and gel-clot) showed that the ultrafilter performance decreased with use and was significant after 200 operating hours. CONCLUSIONS: Heat disinfection between dialysis shifts and chemical disinfection at the end of the day exclude bacterial contamination of the monitor as well as chemical disinfection; LAL test is a useful and simple tool to assess the ultrafilters performance in each Center.

Bacterial Infections↗

Control of post-operative infection in orthopaedic surgery. Clinical and bacteriological findings in 2555 elective operations.

Post-operative infection is still a serious problem in orthopaedic surgery. Technological advances aimed at achieving aseptic conditions in the operating theatre, and the prophylactic use of antibiotics during operation have considerably reduced this complication during the last decade. Two indispensable factors in monitoring the effectiveness of these preventive measures are the determination of the incidence of post-operative infection and monitoring of the microbacterial population of the hospital.

Adolescent↗

[Ceftriaxone, a long-acting cephalosporin. Microbiological, kinetic and clinical study].

Ceftriaxone effectively inhibited 332 out of 452 (73.45%) bacterial strains in vitro tests. 291 out of 365 (79.69%) gram negative and 41 out of 87 (47.12%) gram positive strains were inhibited. The tests showed ceftriaxone to be more effective than cephalothin, cephotaxime, cephuroxime, cephamandol and cephoxitin. Kinetic tests showed that cephtriaxone has a plasmatic half life of 7.25 hrs. 24 hours after administration of a 1000 mg venous bolus the drug was still present in the blood. Urinary elimination over a 24 hr. period amounted to means 486.8 mg (48.68%). The drug has liquor transfer capacity. 37 of the 38 patients treated showed complete clinical or clinicobacteriological cure. Improvement was noted in the 38th.

Adolescent↗

[Piperacillin: microbiological and clinical studies].

A microbiological and clinical study of the action of piperacillin is presented. The drug showed an excellent in vitro antibacterial action on gram positive and gram negative microorganisms. Its in vitro action on Ps. aeruginosa (70.8% of strains inhibited) was also extremely interesting, making it the second most effective of the antibiotics tested after polymyxin B and colistin, polypeptides unsuitable for clinical use. In vivo, the administration of piperacillin achieved a clinical and bacteriological cure in 35 out of 40 patients and a clinical cure in 2 out of 40. It was only therapeutically unsuccessful in 3 cases. It is concluded that its microbiological, kinetic and tolerance features make piperacillin suitable for a wide range of therapeutic purposes.

Acinetobacter↗

[Microbiological, kinetic and clinical study on a new cephamycin: cefotetan].

Microbiological, kinetic and clinical studies were conducted on a new cephamycin, cephotetan. In vitro the antibiotic was found to be very effective against all strains tested. It had a particularly strong action against Gram negative bacteria too. Kinetically speaking, an intravenous bolus produced a high plasmatic concentration with a half life of about 4 hours. Elimination via the kidneys was fastest in the first 3 hours after administration (49.82%) and the slowed down. 82.76% of the dose administered was excreted within 24 hours. This antibiotics is particularly indicated in cases of urinary, respiratory and biliary infections.

Adolescent↗

Cyclosporine-induced long-term allograft survival and its potential in posttrauma tissue replacement.

This report is a partial review of our work to date concerning the use of cyclosporine and integumentary/musculoskeletal allografts for posttrauma tissue replacement. Our ultimate goals for such allografts are their lifesaving capabilities in addition to their utilization in functional and aesthetic surgical reconstructions. The potential for such a treatment regimen to produce anatomical replacement of lost parts is a primary motivating reason to pursue such studies. Permanent host-accepted integumentary/musculoskeletal allografts would appear to offer much greater promise in comparison with recent synthetic and cultured tissue replacements. Summarized topics covered in this review include short- and long-term use of cyclosporine in a 30% body surface area rat burn model; bacterial studies in this model; primary wound excision and use of cyclosporine in a massive 80% body surface area rat burn model; pathological skin alterations in cyclosporine-treated rats; the synergistic immunosuppressive effects of prior blood transfusions and cyclosporine; long-term residual cyclosporine levels assayed in various long-term surviving allograft-recipients; and the use of cyclosporine and cadaver skin allografts to treat massive full-thickness burns in patients.

Animals↗

[Aerobic bacterial flora in cutaneous lesions and in venous catheters of severely burned patients].

Bearing in mind the complexity of the topic and its variability owing to the progress made in antibiotic management, and the development of many concepts concerning the pathogenesis and biochemistry of major burns, the already massive literature is supplemented by the addition of relatively recent data to enable comparisons to be made with regard to the quality and frequency of isolation of the bacterial flora observed in such patients, and above all their sensitivity to currently employed antibiotics. The investigation was conducted on patients admitted to the Turin CTO Major Burns Centre between 1972 and 1977. Initially (1972-1975), a microbiological examination was made of purulent secretions from wounds. Subsequently, management was prevalently directed to the early excision of injured surfaces, and attention was therefore directed to the indwelling venous catheters used in treatment and parenteral alimentation. In cases examined in parallel, moreover, there was often a substantial similarity between wound and catheter flora, and when only one species was present in the wounds, the catheter was often sterile. Furthermore, numerous data were collected from antibiograms relating to the most frequently encountered micro-organisms. These usually displayed wide resistance spectra, especially with respect to the most commonly used of historically oldest antibiotics, whereas their resistance to those recently introduced was generally lower. The question of provenance (from the patient himself, the hospital or its medical and paramedical staff) is also examined. Reference is made to a point that has recently become important in the treatment of burns, namely the ascertainment of the degree of contamination not only on the surface, but also in the immediate sub-surface of the lesions, so as to permit a suitable excision of the eschar and skin transplantation. When a sufficient number of findings exist to support this new concept, it will certainly give rise to further studies and research aimed at bringing new, important data to this so rich and multiform topic.

Anti-Bacterial Agents↗