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Biomedical subjects

G C Canalis

Publications and source records attributed to G C Canalis.

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

[Role of phlebography in the study of recurrent leg varices].

In the last four years, 668 phlebographies of the lower limbs were performed in patients affected with varices. Recurrences were detected in 239 patients. Different phlebographic approaches were used, including ascending phlebography of the popliteal and femoral veins and varicography. Specific indications to different techniques are discussed and possible causes of recurrence are analyzed. In patients with recurrent varices, atypical venous drains were often observed, whose involvement could not be detected by either clinical examination or noninvasive instrumental evaluation. Therefore, phlebography represents a reliable and sensitive technique to recognize recurrent varices.

Adult↗
PubMed1992

[Selective arteriography in the study of arterial vasculogenic impotence].

According to the fundamental circulatory nature of penile erection, insufficiency of the arterial blood supply to the corpora cavernosa caused by an organic arterial disease is found in a large fraction of case, overall among the patients aged more than 40. It is possible to evaluate arterial origin of erectile dysfunction by using of noninvasive methods, but to obtain the necessary panoramicity and the characterization of the lesions it needs the use of angiography. Performance of standard arteriography leads to insufficient visualization of pudendal and penile vessels and risks false positive results. Because of penile hemodynamic variability in its different states is necessary the use of pharmacologic devices to perform a diagnostic arteriography. For the selective study of the pudenda and peniena vascularization we perform a selective arteriography bilaterally, with the catheter tip placed in the proximal part of the internal iliac artery. We use a contrast medium particularly diluted and mixed with xylocaine. We perform angiographic sequences after intracavernous injection of 8-10 mgr of papaverine to obtain the maximum blood flow and to prevent spasm of the terminal arterioles. Arteriography gives a complete study of the pudenda arterial tree and its terminal ramifications, and it is able to supply all the necessary informations regarding the planning of revascularization procedures. Treatment of arterial lesions is possible with surgical and radiologic methods. As in other arteries, percutaneous transluminal angioplasty (P.T.A.) can be applied in the therapy of impotence caused by arterial insufficiency. P.T.A. is the election treatment in the stenosis of the common iliac and internal iliac arteries.(ABSTRACT TRUNCATED AT 250 WORDS)

Angiography↗
PubMed1991

[The radiological study of afferent and efferent loop syndromes].

The authors report on the diagnostic role of radiological imaging in the study of the patients who underwent gastric surgery. This kind of intervention is often followed by postoperative complications, so that accurate clinical-instrumental investigations are required. Routine controls both in the immediate postoperative period and during follow-up are useful especially when a neoplastic lesion was the underlying condition leading to surgery. Radiological imaging plays a fundamental role especially in evaluating such postoperative conditions as afferent and efferent loop syndromes. Radiology is thought to be essential to demonstrate the syndrome and to identify the mechanical/functional nature of the factors causing the disease, all of which are essential to an appropriate and safe therapy. Both the duration of follow-up (early and late controls) and the choice of contrast (water-soluble contrast medium or double contrast enema) are very important factors depending on the time of surgery and the clinical indication.

Afferent Loop Syndrome↗
PubMed1987

[Transluminal urethroplasty. Preliminary experience in 15 cases].

Thirteen patients with urethral stenoses of different etiopathology underwent TUP with an angioplasty balloon catheter. At follow-up, more than 10 months later, 8 out of 10 patients had normal urinary function. Excluding cases of urethral compression due to prostatic hyperplasia, 90% of the stenoses were successfully dilated. The gradualness of the dilatation, the application of a Foley catheter to maintain the dilatation obtained and the prevention of urinary infections are important factors for the success of this method.

Adult↗
PubMed1986

[Diagnostic and therapeutic value of angiography of the mesenteric area].

The widespread diffusion of digital imaging progressively reduces the indications to conventional angiography in all vascular districts. On the contrary, angiography of mesenteric arteries still works as a valid complementary diagnostic tool in granulomatous and neoplastic lesions of ileum. Today, in selected patients, angiography is the first diagnostic approach to vascular ischemic and hemorrhagic pathology of ileum; timely resort to interventional angiography improve a dramatic prognosis.

Adult↗
PubMed1985

Digital angiography in evaluation of orthopedic tumors.

Preoperative evaluation of orthopedic tumors using digital subtraction angiography (DSA) proved useful to ascertain the nature of the lesion, its extension to soft tissues and joints, and the presence of arteriovenous (AV) shunts. We report that overall accuracy varied from 89% to 92%, depending on the feature evaluated. The importance of angiographic examination of this entity is discussed as well as the advantages of DSA over conventional angiography.

Angiography↗
PubMed1985

[Value of splenic embolization in patients with hypersplenism].

The authors describe the importance of embolization of the splenic artery by means of Gianturco coils in splenomegalic portal hypertension. They propose their first experience of six cases and the good results on the basis of clinical parameters, of bleeding of esophageal varices, of hematological values. They also show the influence of this method on hemodynamic, metabolic, and respiratory parameters, altered in cirrhotic patients.

Adult↗
PubMed1985

[Transluminal esophagoplasty (TE)].

The authors analyze their experience on 9 cases of esophageal stenosis dilated by "Grüntzig" type balloon catheter under fluoroscopic examination (transluminal esophagus plastica: TE). This procedure also allows dilatation of severe narrowing, offering distinct advantages represented by: low risk, easy performance, good tolerance, reduction or disappearance of disphagia. Esophageal perforation is possible, though it never appeared in author's experience.

Barrett Esophagus↗
PubMed1983

[Angioplasty of the renal arteries. Our experience with a 12-month follow-up].

We have treated 56 stenoses of renal arteries in 50 patients in which a renin assay indicated renovascular hypertension. In this paper we refer only to 40 cases of renal arteries angioplasty in 37 patients (3 cases of bilateral stenoses) with a clinical follow-up of 12 months. 25 lesions were of arteriosclerotic nature, while 15 were due to fibromuscular displasia. Results demonstrated that angioplasty resolved hypertensive conditions (either with or without medical therapy) in 82% of the cases of arteriosclerotic lesions and in 86% of the stenoses due to fibromuscular displasia. Although extremely rare, the complications that may occur with this procedure are very serious (arterial rupture, acute thrombosis, peripheral embolization). Out of utmost importance is a close collaboration with a vascular surgeon. Without doubt angioplasty will bring about radical changes in the preparation of therapeutical protocol and in some selected cases to improve renal function.

Adolescent↗
PubMed1980

[The Peutz-Jeghers syndrome. Study of 2 familial cases].

Two new familial cases of Peutz-Jeghers syndrome are reported. The cases present a number of original aspects with regard to anomalous transmission of the defect, the common finding of a single ileal polyp and associated malformations in the first of the two cases. The clinical aspects of the disease are discussed together with the histology of the polyps in relation to their possibility or otherwise of degenerating. Finally, the various surgical techniques indicated for the treatment of this rare condition are examined.

Adolescent↗
PubMedDate not supplied

Conventional ultrasonography versus Tissue Harmonic Imaging for the assessment of the common bile duct in cholecystectomized patients.

PURPOSE: The ultrasonographic study of the common bile duct in cholecystectomized patients is very often hampered by the presence of meteorism, scarring tissue, and internal adhesions. The aim of this study was to assess the usefulness of Tissue Harmonic Imaging (THI) in these clinical circumstances. In this technique, the image is formed by using not only the fundamental echo but also its harmonics, which improves the signal-to-noise ratio and considerably reduces the artefacts found in conventional US images. MATERIALS AND METHODS: Seventy-six consecutive cholecystecomized patients (53 F, 23 M, average age 56.9+/-14.5 SD, range 20-81) were assessed. Patients were examined on an empty stomach. The examinations were performed with conventional ultrasonography and with THI. Based on the capability to visualise the distal portion of the common bile duct and in particular to assess the intraluminal content, the study results were rated by three radiologists blinded to each other's evaluation as insufficient (1), sufficient (2), good (3) ad excellent (4). RESULTS: The average diameter of the common bile duct was 4.74+/-2.3 mm (range 1.6-13 mm); at conventional ultrasonography, the visualisation was insufficient in 30% of the cases, sufficient in 52%, good in 18%. With THI the visualisation was sufficient in 17% of the cases, good in 59% and excellent in 24%. Ten out of 76 patients (13%) had stones in the common bile duct. In these cases, conventional ultrasonography was insufficient for diagnosis in 5 patients. All three radiologist (A, B and C) rated THI better than fundamental ultrasonographic imaging (ETG) (p-value <0.0001, Wilcoxon signed rank test). The mean (SD) of the differences between THI and ETG rating were for radiologist A, B and C respectively: 1.25 (0.57), 1.22 (0.51), 1.09 (0.57). Differences for all the radiologists did not significantly vary between older (over 74 years) and younger patients (p-value = 0.35, Wilcoxon rank-sum test). With Cohen's Kw evaluation we obtained better inter-observer agreement (0.71 and 0.80 A and B; 0.7 and 0.79 A and C; 0.71 and 0.81 B and C by conventional ultrasonography and THI). CONCLUSIONS: THI proved to be superior to conventional ultrasonography in the study of the common bile duct in cholecystecomized patients and in particular in the identification of choledocholithiasis.

Adult↗
PubMedDate not supplied

[Incompetence of the m. gemellus veins in varicose veins: its incidence and phlebographic study].

The authors report on 466 venographies of the lower limbs performed over the past 2 years on 412 patients affected with varicose veins. Pathologic reflux of the gastrocnemius veins was observed in 15.7% of cases: 9.7% in the group of non-operated patients and 25.3% in the group with recurrent varicose disease. Ascending venography (and eventual popliteal venography) is the ideal diagnostic approach to show gastrocnemius veins incompetence, eventual anatomic variations, and isolated/associated incompetence of the short and/or long saphenous vein territory. Moreover, venography allows the hemodynamic evaluation, and shows reversed flow in the gastrocnemius veins in case of incompetence.

Contrast Media↗