Central Venous Catheter Thrombosis Clinical Trial
Official title:
Observational Study With Ultrasonographic Screening for Early Detection of PICC-related DVT, Results of Early Beginning of Anticoagulant Treatment
Background: PICC-related thrombosis have shown a slightly different pattern of frequency and
risk factors, compared with traditional CVC; because of the increasing diffusion of PICCs,
they are becoming a somehow independent pathology, still under investigation; no
pharmacological prevention has proved to be effective. Aim of this study is to estimate the
cumulative incidence of thrombosis in a cohort of patients carrying a PICC-line CVC,
monitored to allow an early detection and prevention of complications related to the
presence of asymptomatic deep venous thrombosis, and to explore the role of several
potential risk factors.
Methods: in a prospective observational cohort we will enroll 150 consecutive patients
having a PICC inserted by our team; clinical characteristics, comorbidities and main
features of catheter positioning procedure will be registered; patients will be followed
with clinical and echographic scheduled controls, weekly for the first month, then monthly;
patients with PRDVT will be treated with LMWH and recontrolled weekly until removal of
catheter
All PICCs are positioned by trained physicians and nurses, after ultrasonographic screening of the whole upper limbs venous district, axillary, subclavian and jugular veins for detecting possible pre-existing thrombosis; positioning is performed with real-time ultrasonography guide with a portable device. Patients are recontrolled one week after positioning; patients who report pain, swelling, fever, skin colour changes, exit site tenderness, or any symptom suspected for thrombosis or infection, are immediately seen. A duplex ultrasound complete examination of the upper limb and neck vessels is performed, and at the same time the whole arm and the exit site is inspected to exclude infections; diagnostic criteria for DVT include incompressibility of the vein and direct visualisation of PICC-surrounding thrombus; in uncertain cases, a doppler examination is performed.If the examination is negative for thrombosis, further controls are performed at 2,3,4 weeks after positioning, then once a month.If a DVT is detected, we register the position and extension of the thrombus, and its main characteristics (clot, mural or occlusive thrombosis); the catheter is left in place and a therapy is prescribed with LMWH at full doses, according with ACCP guidelines 2008 (confirmed in 2012 edition). Then, the patient is recontrolled weekly until removal of the catheter. ;
Observational Model: Cohort, Time Perspective: Prospective
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