Dispositivos intra-traqueais: próteses ou órteses?

Terra, Ricardo Mingarini; Minamoto, Hélio; Jatene, Fábio Biscegli

doi:10.1590/s1806-37132006000600024

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“…28 (1) In our study, the frequency of inflammatory infiltrate was intense in the two groups compared. In relation to infiltrate cellularity, it was predominantly lymphomononuclear in the non-covered stents; in the covered models, the neutrophilic polymorphonuclear infiltrate was predominant.…”

Section: Biocompatibility Of a New Device Of Self-expandable Covered mentioning

confidence: 49%

Biocompatibility of a new device of self-expandable covered and non-covered tracheal stent: comparative study in rats

Rodrigues¹,

Minamoto²,

Canzian³

et al. 2013

Acta Cir. Bras.

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PURPOSE:To investigate the compatibility of a new model of self-expandable tracheal stent in rats. METHODS:A new device of polyurethane covered and non -covered stent was placed in the trachea of Wistar rats. Animals were distributed in two groups: the polyurethane covered and non-covered group. Macroscopic parameters included position within the tracheal lumen, adherence to the mucosa, degree of dilatation, permeability and internal diameter. Microscopic findings evaluated were: incorporation, inflammatory activity, granulation tissue and epithelial revetment injuries. The observation follow-up was six weeks.All parameters were quantified based on determined score values. Incorporation of the stents was evaluated based on the observation if the stent was fixed into the trachea or if it could be removed. Degree of dilatation was performed by external diameter measurements. Granulation tissue was evaluated by measurements of height of the tissue growing into the tracheal lumen.RESULTS: 100% of non-covered stents had total attachment to mucosa and 100% of polyurethane covered type had adherence only.Regarding dilatation, granulation tissue, inflammatory activity and internal diameter measurements, there were no significant differences between the groups. Pathological tracheal wall injuries were present in both groups. Biocompatibility of a new device of self-expandable covered and non-covered tracheal stent. CONCLUSION:

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Section: Biocompatibility Of a New Device Of Self-expandable Covered mentioning

confidence: 49%