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Biomedical subjects

M Passoni

Publications and source records attributed to M Passoni.

At least 19 recordsLinked to original sources
PubMed2005

Orthotopic liver transplantation for biliary atresia.

Biliary atresia (BA) represents the most frequent indication for liver transplantation (OLTX) in the pediatric population. The aim of this paper was to present a series collected over the last 7 years from October 1997 through July 2004, including 260 pediatric OLTX in 231 patients. BA was the indication in 137 patients. There were 69 boys and 68 girls of mean weight 10.68 kg and median age 0.9 years. As a primary transplant, 99 patients received a LLS graft; 27 a whole graft; four a I+IV-VIII segment, and two a I-IV segment. Mean follow up was 1047 days (range, 1-2496 day). Infections were diagnosed in 45 patients, vascular complications in 27 patients. Surgical complications that required reintervention occurred in 25 patients. In 41 cases biliary complications occurred, 11 requiring reintervention. 16 patients were retransplanted. In two cases another re-OLTx was performed. Currently 126 patients are alive, showing an actuarial 1 year survival of 92% and 5 year 91%, with actuarial graft survivals of 85% at 1 year and 82% at 3 and 5 years. Our results confirm the effectiveness of OLTx for the treatment of children with BA and a failed Kasai procedure. Split liver grafts represent an excellent organ supply for these patients, achieving optimal results with no mortality on the waiting list.

ABO Blood-Group System↗
PubMed2004

Charge separation effects in solid targets and ion acceleration with a two-temperature electron distribution.

The electrostatic field at the solid-vacuum interface generated by two electron populations with different thermal energies, each following a Boltzmann distribution, is analytically derived from the Poisson equation and studied in terms of plasma parameters. In particular, the effect of the pressure of each of the two populations on the amplitude of the electric field and on its spatial extension is described. In order to evaluate the cold electron temperature, an analytical model for the Ohmic heating of the background electron population by laser generated fast electrons is developed and the consequences on ion detachment, ionization, and acceleration processes in laser-solid experiments are discussed. The efficiency of ion acceleration is shown to be controlled by the heating rate of the background electrons.

Journal Article↗
PubMed1984

[Treatment of large tumors of the cerebellopontile angle using a combined transtentorial and translabyrinthine approach to the middle cranial fossa].

The Authors have reported on 7 patients with large tumors (larger than 4 cm) of the cerebello-pontine angle operated-on utilizing a subtemporal-transtentorial-translabyrinthine-trans-occipital approach. The technique, the results and complications of this approach to the cerebello-pontine angle are discussed. The advantages are the delineation of the cranial nerves and of the ventrolateral brainstem with its blood supply. This approach has been associated with a low morbidity and no operative mortality in 5 cases of acoustic nerve tumor and 2 meningiomas.

Adolescent↗
PubMed1979

[Trigeminal neuralgia: interpretation of the results of the Dandy method of rhizotomy].

The patterns of sensory loss in 29 cases of Juxta pontine trigeminal rhizotomy are reported. The section of 70% of the portio major gave a similar impairment of tactile, thermal and pain sensibility in the facial area corresponding to the portio of the nerve section in all the patients. These findings do not support Jannetta and Rand's statement that partial to complete section of the porto major at the pons with complete preservation of the intermediate fibre does not affect the perception of light touch. The reported data suggest: 1--intermediate fibres are not mode specific fibres for light touch; 2--clear separation between thermoalgesic and tactile afferent rootlets does not exist in the trigeminal root; 3--saving the portio minor and the intermediate fibres ensures the preservation of perception of tactile, thermal and pain sensibility, thus avoiding postoperative painful anesthesia and keratitis.

Adult↗