H. Kitagami et al., Experimental study of tracheal patch reconstruction with a covered expandable metallic stent, ANN THORAC, 66(5), 1998, pp. 1777-1781
Citations number
20
Categorie Soggetti
Cardiovascular & Respiratory Systems","Medical Research Diagnosis & Treatment
Background. We evaluated the efficacy of tracheal patch reconstruction with
a covered expandable metallic stent (EMS) with omentoplasty.
Methods. After resecting the right half of the circumferential wall of two
tracheal rings in adult beagle dogs, we inserted a covered EMS to reconstru
ct the defect interiorly. Then, through laparotomy, we made an omental pedi
cle nap and wrapped it around the EMS-interposed area. For comparison with
the group without omentoplasty, we periodically examined the healing proces
s macroscopically and histologically.
Results. Bronchofiberscopic observations revealed that incorporation of the
covered EMS progressed with the passage of time and tracheal luminal paten
cy was maintained well in both groups. However, polyplike granulation devel
oped gradually at both ends of the EMS. Histologically, epithelium was rege
nerated in the patched area 4 weeks postoperatively and the area was covere
d with pseudostratified ciliated epithelium at 12 weeks postoperatively. Qu
antitative analysis of the macroscopic and histologic findings showed that
the inflammatory polyps were reduced and epithelialization was promoted in
the group with omentoplasty.
Conclusions. Tracheal patch reconstruction with a covered EMS, when combine
d with omentoplasty, promoted early epithelial regeneration and suppressed
the development of inflammatory polyps. (C) 1998 by The Society of Thoracic
Surgeons.