Study objectives: A frequent complication of the widely
used Dumon silicone stent is its tendency to migrate when used in
tracheal stenosis. We compared the clinical efficacy and complications
(including migration) of the Dumon stent with a screw-thread stent, a
device with an increased stent-to-wall contact surface and,
theoretically, less tendency to migrate.
Retrospective case analysis.
Materials and methods: Forty-six patients
with tracheal stenoses (23 benign and 23 malignant) requiring the
placement of 50 stents (29 Dumon and 21 screw-thread) were studied. In
26 patients Dumon stents were used, and in 20 patients screw-thread
stents were used. Both patient groups had comparable clinical and
insertion and follow-up were uneventful in both the Dumon and the
screw-thread insertions, respectively: 62% vs 67% (not significant).
There were seven migrations in the Dumon group, compared to only one
migration in the screw-thread group, respectively: 24% vs 5%. This
difference did not reach statistical significance (p = 0.1). All of
the migrations occurred in the benign stenosis group, and none occurred
in the malignant-stenosis group, respectively: 8 of 23 vs 0 of 23,
p = 0.004. Within the benign-stenosis group, the Dumon stent had a
significantly increased risk for migration when compared to the
screw-thread stent, respectively: 7 of 13 vs 1 of 11, p = 0.033.
Conclusions:The screw-thread stent and the Dumon stent are
equally effective in the management of tracheal stenosis. There is a
general trend toward a decreased migration rate, and a significantly
lower risk for migration in patients with benign tracheal stenosis. The
(less expensive) screw-thread stent may represent an attractive
alternative in the management of tracheal stenosis in general, and may
be preferable to the Dumon stent in treating benign tracheal