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Biomedical subjects

C Zini

Publications and source records attributed to C Zini.

90 records · Page 5Linked to original sources
PubMedDate not supplied

Molded tympanic heterografts. Histologic evaluation.

The histologic appearance of the molded tympanic heterograft developed at the ENT Clinic of the University of Parma, Italy, is investigated with light and electron microscopy. Evaluation of the graft before insertion disclosed a unique structure of interwoven collagen bundles. Examination of grafted tympanic membrane showed a structure closely resembling the normal human tympanic membrane. The fate of the heterologous material and the host reaction to it are discussed in relation to histologic findings.

Bioprosthesis↗
PubMedDate not supplied

Prevention of recurrent cholesteatoma in closed tympanoplasty.

Recurrent cholesteatoma in a series of 534 staged intact canal wall tympanoplasties performed over a 10-year period has been reviewed for the present study. Overall detected incidence of recurrent cholesteatoma is 5.2% (28 of 534 operated ears). A steady decrease of recurrent cholesteatoma was found, however, in the second period of our surgical experience (1978 to 1982) when prevention techniques were adopted in all operations, resulting in a 1.07% incidence (four of 373 operated ears). Our present policy for prevention of recurrent cholesteatoma in intact canal wall tympanoplasties with mastoidectomy includes the use of plastic sheeting with thick Silastic, the repair of bony sulcus defects with cartilage shavings, staging of the operation with preplanned reexploration of the middle ear and mastoid, and transtympanic ventilation tube insertion in cases of refractory tubal insufficiency.

Adult↗
PubMedDate not supplied

[Cholesterol granuloma of the petrous apex].

Cholesterol granuloma of the petrous apex is a relatively rare tumor, and usually is not associated with middle ear pathology. Precise assessment of the diagnosis and extension allows the surgeon to plan the most appropriate and functional strategy. The advent of magnetic resonance imaging has helped, showing a high signal in T1 and T2 without enhancement after the administration of intravenous paramagnetic contrast. The occipito-temporal approach provides direct access to the anterior and posterior petrous apex without opening the dura, which preserves the facial and the cochlear-vestibular functions.

Adult↗
PubMedDate not supplied

[Total reconstruction of the posterior wall of the external ear canal with allogenic rib cartilage. Technique and results].

Middle-ear reconstruction using a closed surgical technique has the same surgical stages as in combined-approach tympanoplasty. The only special feature is the reconstruction of the posterior canal wall and scutum, an essential step. This reconstruction process is carried out with allogenic costal cartilage affixed to two deep bony slots with fibrin glue. In 90% of cases surgery is done in two stages.

Adolescent↗