Contrast venography vs. radionuclide venography: a study of discrepancies and their possible significance.

Abstract

In 51 instances, patients underwent radionuclide venography with technetium 99m-labeled macroaggregated albumin followed by contrast venography. The criteria used for diagnosis of a positive radionuclide venogram (flow pattern and retention of radionuclide) were evaluated. Cases in which there were discrepancies between the two studies were analyzed. Multiple factors were found to result in a lack of correlation between the two studies. These are: failure to recognize nonfilling of the deep venous system on the radionuclide venogram, disparate distribution of the venographic imaging agents, presence of varicose veins, large venous valves, previous femoral venipuncture, postsurgical narrowing with obstruction, age of the thrombus, and other factors. These factors and their implications with respect to venographic technique are discussed.

Deep Venous Thrombosis and Pulmonary Embolism in Trauma Patients

“…Further, in states of hypoperfusion, which frequently accompany seAlthough many tests have been proposed, and are used, for DVT diagnosis, only three have been well validated: impedance plethysmography (IPG) [41], radiolabeled fibrinogen leg scanning (RLS) [38,42], and contrast venography. Other approaches such as Doppler ultrasonic flow detector [43J, ], two-dimensional ultrasound (2-D Echogram), and radiovenography [44] still await full validation. Still others are in.…”

Peripheral veins

“…All have had their advocates; however, due to their limitations, none of these techniques has ever been accepted clinically as suitable for routine use. Radio-isotope scanning, [8][9][10] whilst accurate within the calf, has reduced sensitivity and specificity in the proximal venous system, 11 probably the most important area clinically in relation to the risk of a thromboembolic event. Thermography, [12][13][14] on the other hand, has difficulty differentiating superficial thrombophlebitis from DVT, leading to false positive scans.…”

Παραγοντες Που Προδιαθετουν Για Θρομβοεμβολικη Νοσο Σε Ορθοπεδικες Επεμβασεις Αντικαταστασεως Της Περιοχης Του Ισχιου

“…η μικρή διαχωριστική ικανότητα με συνέπεια να φαίνονται οι τρεις βασικές φλέβες της κνήμης σαν μία και -η δυσκολία της ερμηνείας της στάσεως του αίματος η οποία μπορεί εκτός από τη φλεβική θρόμβωση να οφείλεται σε μεταφλεβιτικό σύνδρομο, σε κιρσώδεις ανευρύνσεις είτε σε χαλαρό μυϊκό τόνο. 126 III. Εξέταση φλεβικής λειτουργίας με ραδιοϊσότοπα Η μέθοδος αυτή παρότι δεν έχει ευρεία εφαρμογή βοηθά στον έλεγχο των βαλβίδων που πιθανόν εμφανίζουν ανεπάρκεια καθώς και στη διάγνωση της αποφράξεως των φλεβικών στελεχών.…”