[Microecosystem of ostiomeatal complex and its changes via functional endoscopic sinus surgery].

Objective: To study the composition of microecosystem in ostiomeatal complex on adults and its changes via functional endoscopic sinus surgery.

Method: Two hundred adults were grouped based on pre- or postoperation as well as its type of sinusitis. Swab speciemens were taken from three different sites of ostiomeatal complex in each individual, cultivations and identifications of aerobes, anaerobes and fungi were performed simultaneously; the microecosystem of OMC was analysesed.

Result: All aerobes belonged to thirteen genera thirty species, anaerobes were three species and three major species of fungus were cultured, most of them have none or less virulence; statistically, none significance were shown between differences of type I and II (P > 0.05); as to aerobes, difference between preoperative group and control group had significance (P < 0.01); culture rate descended postoperatively while the difference had no significance compared to preoperative group (P > 0.05); difference of rate of same aerobic culture from three sites (RSAC) between preoperative and control group was significant (P < 0.01), while wasn't between postoperative group and control one (P > 0.05). Taking fungi into account, differences among all groups had no significance (P > 0.05); anaerobes were rare in all groups.

Conclusion: Being a microecosystem under normal condition, ostiomeatal complex is relatively clean and exists as a whole space; while chronic inflammation separate different parts of which from each other with multimicrobial existence; FESS reverses the separation of the microecosystem in OMC and rebuild it as a whole again, thus promote the recovery.