Efeito do cloridrato de proparacaína a 0,5% na força isométrica dos músculos retos horizontais em pacientes estrábicos

Efeito do cloridrato de proparacaína a 0,5% na força isométrica dos músculos retos horizontais em pacientes estrábicos

Autores:

Adriano Bertoni Frasson,
José Belmiro de Castro Moreira

ARTIGO ORIGINAL

Arquivos Brasileiros de Oftalmologia

versão impressa ISSN 0004-2749versão On-line ISSN 1678-2925

Arq. Bras. Oftalmol. vol.61 no.1 São Paulo fev. 1998

http://dx.doi.org/10.5935/0004-2749.19980105

SUMMARY

The effect of the proparacaine hydrochloride 0.5% on the horizontal rectus muscles force was studied in fifteen strabismus patients during one-stage adjustable suture strabismus surgery. The muscles were grasped with a modified Green's strabismus hook and both maximal and minimal (rest) isometric force values were registered on a digital dynamometer attached on the surgical microscope before and after one and two drops of topical anesthetic. One drop of anesthetic did not change the maximal isometric force, while two drops reduced significantly both maximal (Fcalc 4.03*; Fcrit 3.34; Tukey's test: after two drops < initial) and minimal (Fcalc 38.20*; Fcrit 3.34; Tukey 's test: after two drops < initial and after one drop) isometric forces, the last more severely. Although it was not necessary to change the surgical technique neither were surgical results unexpected after one and two drops of topical anesthetic, it is safer to instill only one drop of the anesthetic if it is really necessary and do not too close to the alignment time to prevent an undesired surgical result.

REFERÊNCIAS

1 Wisnicki HJ, Repka MX, Guyton DL. Reoperation rate in adjustable strabismus surgery. J Pediatr Ophthalmol Strabismus 1988;25:112-4.
2 Metz HS. Adjustable suture strabismus surgery. Ann Ophthalmol 1979; 11:1593-7, apud Wisnicki HJ, Repka MX, Guyton DL, 1988, p. 113.
3 Thorson JC, Jampolski A, Scott AB. Topical anesthesia for strabismus surgery. Trans Am Acad Ophthalmol Otolaryngol 1966;70:968-72.
4 Mendonça TS, Oliveira MC. Anestesia tópica para estrabismo. Arq Bras Oftal 1996;59:217-9.
5 Prieto-Díaz J, Souza-Dias C. Estrabismo. Argentina: La Plata, 1996:586.
6 Sokal RR., Rohlf FJ. Biometry. San Francisco: W.H. Freeman & Company; 1969:776.
7 Simonsz HJ. Force-length recording of eye muscles during local-anesthesia surgery in 32 strabismus patients. Strabismus 1994;2:197-218.
8 Ritchie JM, Greene NM. In: Gilman AG, Goodman LS, Rall TW, Murad F Ed. Goodman and Gilman's. The pharmacological basis of therapeutics. New York: Macmillan Publishing; 1985:198.
9 Porter JD, Baker RS, Ragusa RJ, Brueckner JK. Extraocular muscles: basic and clinical aspects of structure and function. Survey of Ophthalmology 1995; 39:451-84.
10 Guyton AC. Textbook of medical physiology. W.B. Saunders Company; 1991.
11 Collins CC. The human oculomotor control system. In: Lennerstrand G, Bach-y-Rita P, editor. Basic Mechanisms of Ocular Motility and their Clinical Implications. New York: Pergamon Press; 1975:145, apud Porter JD, Baker RS, Ragusa RJ, Brueckner JK, 1995.
12 Cooper S, Daniel P, Whitteridge D. Muscle spindles and other sensory endings in the extrinsic eye muscles: the physiology and anatomy of these receptors and their connections with the brainstem. Brain 1955;78:564.
13 Scott AB, Collins CC. Division of labor in human extraocular muscle. Arch Ophthalmol 1973;90:319-22, apud Porter JD, Baker RS, Ragusa RJ, Brueckner JK, 1995.
Política de Privacidade. © Copyright, Todos os direitos reservados.