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Biomedical subjects

M Porena

Publications and source records attributed to M Porena.

At least 37 records · Page 2Linked to original sources
PubMed1993

Urinary retention due to prostatic involvement in testicular lymphoma: a case report.

Testicular involvement was the first manifestation of malignant lymphoma in the present case; after six months the disease became generalized but repeated chemotherapy achieved amelioration with negative bone-marrow biopsy after one year. Then urinary retention appeared, due to prostatic involvement from primary testicular lymphocytic lymphoma. We believe that this is the first reported case of primary malignant lymphoma of the testicle with secondary localization to the prostate and acute urinary retention.

Aged↗
PubMed1993

[Color Doppler echography of the cavernous bodies after F.I.C. in the study of erectile impotence of vascular origin].

Study with the Doppler method has been associated with "cavernometrics" and "cavernography" in erection pathologies for some time. But this enquiry is burdened not only be technical inaccuracies such as the lack of knowledge of the angle of incidence of the doppler wave and the diameter of the explored vessel etc, but also by intrinsic difficulty method itself. Therefore, the authors have used a color Doppler to individuate and study the cavernous arteries, and present the results obtained from a group of 21 patients, all affected by erectile deficits, who were selected on the basis of anamnestica and clinical criteria. They individualized 21 patients in whom the vasculogenic nature of their affection appeared probable, out of the 125 who were under their observation for their sexual inadequacy. In three patients the clinical suspicion of a venous incompetency was confirmed by dynamic "cavernometrics with cavernography". The study of the four phases of erection (flaccidity, tumescence, erection, detumescence) was carried out after an intracavernous injection of 20 micrograms of PGE/1. The parameters considered were: systolic velocity of the hematic wave, diastolic speed, the index of resistance and range. In cases of vasculogenic impotence with an arterial base the systolic wave in the 2nd and 3rd phases presented a speed inferior to the norm of standard values, the resistance index altered by the lacking of physiological increment due in the erectile beyond the closing of venous "polsters", also to the rigidity of the albuginea.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1993

[Echography during drug-induced erections in the study of penile plastic induration].

Clinical investigation is still fundamental in the diagnosis of La Peyronie's disease. In this study 36 patients underwent clinical investigation and ultrasound in basal conditions and during drug-induced erection, and the results were compared. In basal condition US does not provide much useful supplementary informations. During drug-induced erection US accurately visualizes plaque site and dimensions and anatomical abnormalities about corpora cavernosa, albuginea, septum and dorsal vessels.

Adult↗
PubMed1993

[Traumatic injuries of the urethra: an echographic study].

US in the lower urinary tract usually explores the bladder and the prostatic urethra. In this study we used US instead of x-rays to visualize the remaining urethra in 42 patients. US was useful in the presence of urethral trauma. The site and extent of injury, particularly peri-urethral lesions (hematomas, urinary collection and abscesses in relation to the urethra) were observed. Ultrasound's efficacy and reproducibility were also useful in post-operative follow-ups.

Adult↗
PubMed1991

[Ultrasonically guided access to the kidney].

Ultrasonography is an ideal procedure to guide and control the diagnostic and therapeutical percutaneous renal puncture. Some procedures considered in pre-echographic period, long, complicated and not free from risks and complications, were transformed in routine manoeuvres by the advent of ultrasound. Nowadays, thanks to the ultrasound guide, is possible to perform a rapid, accurate, safe and without anesthesia puncture of the kidney and of the upper urinary tract. Several procedures contemplating the renal puncture, can be performed in out-patients.

Biopsy↗
PubMed1990

Diuretic ultrasound. A non-invasive technique for the assessment of upper tract obstruction.

A study was made of the diagnostic reliability of renal ultrasound with a diuretic in the evaluation of upper tract obstruction. The test comprised an initial renal ultrasound examination followed by the intravenous injection of 250 ml physiological saline with 40 mg frusemide; further ultrasound scans were carried out from 5 to 150 minutes later. A total of 67 patients was studied and the results were compared with those of diuretic intravenous urography, diuretic renography and, in some cases, the Whitaker test. Dynamic ultrasound with a diuretic showed a sensitivity of 94%, specificity of 94%, positive predictive value of 91% (obstructive), negative predictive value of 96% (non-obstruction) and a total diagnostic capacity of 94%.

Adolescent↗
PubMed1987

Real-time transrectal sonographic voiding cystourethrography.

Transrectal linear array transducer makes possible a sagittal view of the bladder base-plate, prostatic urethra, and membranous urethra yielding an image similar to that obtained with voiding cystourethrogram. This permits lack of time limitation, such as imposed by the use of fluoroscopy, and the possibility of visualizing not only the lumen of the bladder neck and urethra but also the surrounding soft tissue. Using ultrasonographic urodynamics in neuromuscular dysfunctions of the bladder and urinary voiding obstructions we obtained excellent results in patients with detrusor-sphincter dyssynergia and in those with posterior ledge at the bladder neck. Both conditions are clearly visualized, particularly the existence of the posterior ledge which is responsible for the failure of the sphincterotomy in patients with periurethral striated sphincter spasm.

Humans↗
PubMed1985

Classification of idiopathic hypercalciuric patients by isotopic calcium absorption: a comparison with oral calcium tolerance test.

To test the accuracy of calcium tolerance test in estimating calcium absorption, we have measured the radioactive calcium absorption (expressed as Fx) in 27 patients with IH and renal calcium stones. The results of this test were compared with those of a standard oral calcium tolerance test. Although only seven of nine AH patients displayed normal fasting calcium excretion, they all displayed Fx values above normal and a normal parathyroid activity. Conversely, only 5 of our 18 RH patients demonstrated a hyperabsorption of radioactive calcium and an elevation in iPTH and cAMP above normal limits, yet all of them showed an increased calciuric response to an oral calcium challenge. Calcium absorption was inversely related to iPTH (r = -082; P less than 0.001) and cAMP (r = -064 P less than 0.05) in AH, but directly proportional to these parameters (r = 0.62 P less than 0.001 and r = 0.46 P less than 0.05, respectively) in RH patients. In view of these results, two ratios, iPTH/Fx and cAMP/Fx were used to discriminate between the two groups of patients. Both ratios were over normal limits in all RH patients and within normal range in all but one AH patient. Furthermore, no overlap was found between the two groups. Conversely, we were unable to completely separate AH from RH subjects on the basis of the oral calcium tolerance test, since in both groups the fasting and the absolute (or percentage) changes in urinary calcium, cAMP and blood iPTH levels following oral calcium loading, overlapped in each instance.(ABSTRACT TRUNCATED AT 250 WORDS)

Absorption↗