Effect of anti-adhesion barrier solution containing ciprofloxacin-hydrocortisone on abraded mucosa with otitis media.
ABSTRACT OBJECTIVE: No study to date has assessed the anti-adhesive effect of new middle ear (ME) packing agents in. This study compared the anti-inflammatory and anti-adhesive effect of antibiotic-steroid containing packing agents in abraded mucosa of the ME inflammation. MATERIALS AND METHODS: Transbullar injection of a saline suspension of Pseudomonas aeruginosa lipopolysaccharide (LPS) induced otitis media. ME mucosa of guinea pigs was abraded using a pick 30min after LPS inoculation. The animals were divided into four groups of 10 guinea pigs each. In group A, ME cavity was preserved without any packing. In group B, ME cavity was packed with soluble hyaluronic acid-carboxymethyl cellulose (HA-CMC). In group C, the ME cavity was packed with soluble HA-CMC. In group D, the ME cavity was packed with antibiotic-steroid containing soluble HA-CMC. Otoendoscopic examination, auditory brainstem responses (ABRs), and radiographic examination using computerized tomography (CT) were performed at 2 weeks post-surgery. Histopathological evaluation for ME mucosa was performed by light microscopy (LM) and scanning electron microscopy (SEM). RESULTS: Otoendoscopic findings and CT findings revealed that group D showed the best recovery of aeration in the ME compared to other groups. Recovery of ABRs threshold was significantly attenuated in group D. In LM and SEM findings, group D showed normalized mucosal thickening compared to other groups. CONCLUSION: ME packing by antibiotic-steroid containing soluble HA-CMC may be useful in the abraded mucosa of the ME inflammation.
Article: Failures in myringoplasty.[Show abstract] [Hide abstract]
ABSTRACT: We analyzed those failures occurring in 417 myringoplasties. Forty-four drum re-perforations were found (10.6%), half of which occurred immediately after operation. Causes of these early failures included necrosis in the middle of the graft without infection (10 ears) and blunting of the anterior margins of the graft (7 ears). Infection was the most common cause of re-perforations in the later failures. Re-perforations also occurred more frequently when larger perforations were closed in contrast to repair of small ones. We found that other pre-operative factors ("dry" or "wet" ear, site of the perforation) or grafting technique ("underlay" or "overlay") did not affect the graft take-rate. Adhesive eardrums were found in 23 ears (5.5%). These were more common when ears were infected pre-operatively, when middle ear mucosa was removed during the primary operation, or when squamous epithelium was present on the tympanic mucosa. Lateralization of the grafted eardrum was found in two cases (0.5%), both of which had been operated on using the sandwich technique.Archives of Oto-Rhino-Laryngology 02/1985; 242(1):27-33.
- [Show abstract] [Hide abstract]
ABSTRACT: Absorbable gelatin sponge (Gelfoam)--commonly used in otosurgery--was gently inserted or firmly packed into the middle ear cavities of rats. The postoperative changes were evaluated 2 to 3 months later when, apart from some air-filled canals leading from the tympanal orifice of the Eustachian tube towards the attic, the middle ear cavity had become filled with newly formed bone and an amorphous mass of adhesions and bridles. The mass consisted of loose connective tissue, with fibroblasts, vessels and inflammatory cells. The tympanic membrane was retracted and fixed to the promontory. There were no signs that any Gelfoam had been removed through the Eustachian tube. The authors proposed that similar tissue reactions may occur in tympano-plasties.Acta Oto-Laryngologica 96(3-4):269-75. · 1.11 Impact Factor
- [Show abstract] [Hide abstract]
ABSTRACT: The effects of hyaluronic acid (HA) on macrophage function, in terms of the phagocytosis of latex beads and superoxide anion and hydrogen peroxide release stimulated by phorbol myristate acetate (PMA), were studied in guinea-pig peritoneal macrophages. Phagocytosis was inhibited in a dose- and molecular-weight-dependent manner by HA. The addition of PMA to the culture, at a dose of more than 10 ng ml-1, caused an increase in the release of active oxygens. The release of active oxygens was inhibited by high molecular weight HA (MW 2.02 x 10(6), HA-202) in a dose-dependent manner. In cell-free systems, HA-202 had a negligible effect in scavenging these active oxygens. Of the three molecular sizes of HA (MW: 0.28 x 10(6), 0.98 x 10(6) and 2.02 x 10(6)), HA-202 most strongly inhibited the active oxygen release. These results indicate that high-molecular-weight HA acts directly on macrophages to inhibit phagocytosis and active oxygen formation, which, in turn, ameliorates the progression of chronic inflammation.Agents and Actions 02/1993; 38(1-2):32-7.