Search PubMedSearch

Biomedical subjects

M W Boyer

Publications and source records attributed to M W Boyer.

5 recordsLinked to original sources

Thrombosis: the major Hickman catheter complication in patients with solid tumor.

Major complications of Hickman catheter placement (thrombosis and infection) were determined in 168 patients with solid tumor (lung, 79; head and neck, 56; esophagus, 24; and miscellaneous, 9). Catheter-related thrombosis was clinically detected in 22 individuals and was detected at autopsy in six (total 17 percent). The 17 percent figure underestimates the true incidence of thrombosis since only 25 percent of study patients had autopsies. Patients with adenocarcinoma of the lung constituted a high risk group. Nine of 20 (45 percent) of these patients had thrombosis compared to 25, 9, and 16 percent of patients with squamous cell cancers of lung, head and neck and esophagus, respectively (p less than 0.002). Three patients with thrombosis had pulmonary emboli and two died. Thrombosis occurred despite daily heparin catheter flushing. INfections occurred in 11 patients. One had suspected endocarditis, one had a subcutaneous tunnel infection, and nine had exit site infections. All responded to local or systemic antibiotics. Better methods to prevent thrombosis are needed.

Adenocarcinoma

Hickman catheter clots: a common occurrence despite daily heparin flushing.

Central vein thrombosis is the major Hickman catheter complication in our patient population. After noting clots attached to the disposable infusion plug of these catheters, we prospectively determined whether the presence of clots indicated a high-risk group for thrombosis. Forty-three patients (41 with solid tumor, two with acute leukemia) were studied. Catheters were flushed daily with heparin (10 units/ml), and urokinase (5000-10,000 units) was injected when blood could not be drawn. Clots within the catheter lumen were detected visually after expressing, onto a 4 X 4-inch gauze pad, the first 5-10 ml of admixed blood and flush solution or iv infusion fluid drawn from the catheter prior to blood drawing. Clots were detected in 153 of 508 specimens (30%). Forty of 43 patients had clots, varying in length from fragments to 5 cm, in at least one specimen. Inpatients and outpatients had a similar percentage of clotted specimens. Eight patients developed clinical (six) or autopsy-proven (two) thrombosis. There was no difference between patients with and without thrombosis in percent of discards positive for clots. This study indicates that clots are frequently present in the lumina of Hickman catheters. It is likely that these clots embolize to the lungs when catheters are flushed. Consequences of embolization are unknown.

Blood Specimen Collection