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Biomedical subjects

P Pietri

Publications and source records attributed to P Pietri.

At least 19 recordsLinked to original sources
PubMed1991

Isolation of Enterobacter amnigenus from a heart transplant recipient.

The isolation of Enterobacter amnigenus from a human source is reported. This microorganism was grown from an intravenous catheter and, along with Pseudomonas aeruginosa, from the blood of a heart transplant patient. The biochemical characteristics and antimicrobial susceptibilities of the isolate are described.

Bacteremia↗
PubMed1990

Observer variation in mammary thermography: results of a teaching file test carried out in four different centers.

To evaluate observer variation in mammary thermography, a teaching file test of 159 thermographies was worked out by 4 senology centers. The evaluation of accuracy and the K index of variability demonstrated a significant variability among centers. The reliability of thermography in senology seems to be too poor for it to be able to direct any therapeutic decision, either diagnostic or prognostic.

Breast Neoplasms↗
PubMed1990

[Successful cardiac transplantation after 38 days of circulatory assistance with a heterotopic artificial heart].

The survival of a patient with irreversible cardiac failure on the cardiac transplantation waiting list was assured for 38 days by circulatory assistance with heterotopic Pierce Donachy prosthetic ventricles and followed by successful cardiac transplantation. This method of circulatory assistance is relatively simple to install from the technical point of view and provides a satisfactory haemodynamic result whilst waiting for a compatible donor organ. Several complications, some of them serious, were observed. Some were related to the patient's poor preoperative condition: acute renal failure, disorders of coagulation. These regressed slowly when the patient's haemodynamic status improved. On the other hand, septic problems and local haemorrhage were inherent to this technique. These are the commonest complications reported by other authors. Although the mortality rate during the period of circulatory assistance may appear to be high, this technique remains a valuable method of survival for selected patients and does not affect the chances of success of ulterior cardiac transplantation.

Acute Kidney Injury↗
PubMed1989

[Detection of acute rejection by Doppler echocardiography in orthotopic cardiac transplantation. Prospective comparative study with endomyocardial biopsy].

In a prospective study of 23 patients who had undergone orthotopic heart transplantation we tried to assess the value of doppler-echocardiography in the detection of acute graft rejection. For this purpose, 220 echocardiographic records were compared with the results of endomyocardial biopsies performed at an interval of less than 12 hours. The parameters investigated by TM and two-dimensional echocardiography were: morphological parameters (including septal echodensity), left ventricular mass and systolic function parameters. Diastolic parameters (isovolumetric relaxation time [IVR], transmitral gradient half-decrease time [T 1/2] and proto-end-diastolic mitral velocity ratio [E/A] were measured by TM echocardiography and pulsed doppler velocimetry. The best doppler-echocardiographic criteria for graft rejection were a more than 15 ms reduction of IVR, a more than 15 p. 100 increase of myocardial mass, and a more than 30 p. 100 increase of teh E/A ratio, the corresponding sensitivities for histological rejection being 82, 76 and 74 p. 100 respectively. In contrast, T 1/2 and systolic function studies seemed to be disappointing. Finally, the increase of septal echodensity enabled rejection to be diagnosed with an excellent (92 p. 100) specificity but an insufficient sensitivity. Thus, none of the parameters measured were sensitive enough, taken separetely, to replace endomyocardial biopsy. However, the combined use of the most sensitive of them should make it possible to reduce the frequency of systematic biopsies.

Acute Disease↗
PubMed1986

[Complications of vascular prosthesis].

The main complications deriving from the use of vascular prostheses in the surgical reconstruction of the arteries are thrombosis, infection and the appearance of pseudoaneurysms. Among 233 aorto-femoral b.p., prosthetic thrombosis occurred in 45 patients creating the need for 66 reoperations, 19 early and 47 tardive. In 387 aorto-iliac reconstructions, infection arose early in 11 cases, tardively in 6. Out of 1118 vascular reconstructions there were also 28 pseudoaneurysms (2.5%). After remarks on the aetiopathogenesis of such complications, methods that can be used to prevent them are discussed and personal results of treatment are presented.

Aneurysm↗
PubMed1979

[Late obstructions of aorto-bifemoral prostheses].

The factors underlying late thrombosis of aortobifemoral by-pass are analysed on the basis of personal experience and reported data. They are considered to be due to progressive degradation of the prosthesic tissue and, particularly, to the lack of an adequate back flow route, apart from any faults in the actual construction of the femoral anastomosis. Treatment of the thrombotic complication involves considerable technical and operating problems which have two main solutions: substitution of the thrombosed branch, or its disobstruction. Intimately linked with restoral of by-pass patency is the reconstruction of an adequate back flow route either by means of profundaplasty or by extending the branch as far as popliteal level. Of 83 patients discharged with patent prosthesis, thrombosis occurred in 7 and 10 reoperations were necessary. Reconstruction of branch patency was done in the majority of cases by thrombectomy. Profundaplasty was associated in 4 cases while in other 4 popliteal extension was necessary. Analysis of results shows that the operation of choice on the affluxion route seems to be replacement of the thrombosed branch.

Aorta, Abdominal↗