Regional anaesthesia for intraocular surgery

Wong, David H.

doi:10.1007/bf03009701

Cited by 109 publications

(57 citation statements)

References 161 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The addition of epinephrine to local anesthetics prolongs their effect due to decreased absorption (WONG, 1993;MAMA;STEFFEY, 2003;FANTONI;CORTOPASSI;BERNARDI, 2006). However, in this study, 0.5% bupivacaine associated with a vasoconstrictor showed the same action time as 0.5% ropivacaine, confirming the report by Wong (1993) that the addition of adrenaline to bupivacaine does not prolong the time of akinesia and anesthesia. Although bupivacaine is associated with a vasoconstrictor, there were no complications in the bupivacaine group (e.g., the itching or eye discomfort observed in the ropivacaine group).…”

Section: Discussionmentioning

confidence: 99%

“…The ocular blocks useful in humans (WONG, 1993;GILLART;DUALÉ;CURT, 2002) and large animals (COLLINS et al, 1995;SKARDA, 1996;MUIR III et al, 2001;GILGER;DAVIDSON, 2002) have been shown to be effective and easy to administer when combined with sedation or general anesthesia BEVILACQUA, 2005), and they can be used to minimize the depressant effects caused by the deep planes of anesthesia (MUIR III et al, 2001). …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ocular effects of retrobulbar block with different local anesthetics in healthy dogs

et al. 2014

View full text Add to dashboard Cite

The objective of this study was to evaluate the ocular effects, the feasibility and the quality of retrobulbar block using the inferior temporal technique with different local anesthetics applied with the Tuohy epidural needle in dogs. Eight dogs were included in the experiment and each one was studied four times, with interval of 15 days between the treatments: Lido -2% lidocaine, Ropi -0.75% ropivacaine, Bupi -0.5% racemic bupivacaine and Levo -0.75% levobupivacaine. Except for the ropivacaine, all of the local anesthetics contained epinephrine at 1:200.000. The blocks were performed in the right eyes immediately after anesthetic induction, and the left eyes were not blocked and were used as controls. The intraocular pressure, tear production and corneal sensitivity were evaluated before any procedure (T0), 30 min after premedication (TMPA), 30 min after anesthetic induction (T30), after recovery from anesthesia (TREC), every 60 min up to 360 min and 12 and 24 h after the block. The pupil diameter was evaluated at the same time points, excepted at T0. The maximum pupillary dilatation was observed in Lido group at T120 followed by Ropi at TREC, and Bupi and Levo at T30. All of the anesthetics maintained eye pressure within acceptable levels for normal dogs and significantly reduced tear production. Tear production returned earliest in group Lido, followed by Bupi, Ropi and Levo. The corneal sensitivity returned earliest in group Lido, followed by Ropi, Bupi and Levo. The retrobulbar block using the temporal inferior technique proved to be feasible and safe, although lubrication of the ocular surface is suggested. Key words: Bupivacaine, dogs, levobupivacaine, lidocaine, ropivacaine ResumoO objetivo deste estudo foi avaliar os efeitos oculares, a exequibilidade e qualidade do bloqueio retrobulbar pela técnica inferior temporal, em cães, com diferentes anestésicos locais empregando-se agulha epidural de Tuohy. Oito cães foram incluídos no experimento e cada um foi estudado quatro vezes, com intervalo de 15 dias entre os tratamentos: Lido -lidocaína a 2%; Ropi -ropivacaína a 0,5%, Bupi -bupivacaína racêmica a 0,5% e Levo -levobupivacaína a 0,75%. Com exceção da ropivacaína, todos os anestésicos continham epinefrina 1:200.000. Os bloqueios foram realizados nos olhos direitos dos animais imediatamente após a indução anestésica, e os olhos esquerdos, não bloqueados, foram utilizados como controle. Avaliou-se a pressão intraocular, a produção lacrimal e a sensibilidade corneal antes de qualquer procedimento (T0), 30 min após a medicação pré-anestésica (TMPA), 30 min após a indução anestésica (T30), após a recuperação da anestesia (TREC), a cada 60 min até 360 min e 12 e 24 h após o bloqueio. O diâmetro pupilar foi avaliado nos mesmos momentos, exceto no T0. A máxima dilatação pupilar foi observada no grupo Lido seguida pelos grupos Ropi, Bupi e Levo. Todos os anestésicos mantiveram a pressão ocular dentro dos níveis normais para cães e reduziram significativamente a produção lacrimal. A produção lacrimal reto...

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ocular effects of retrobulbar block with different local anesthetics in healthy dogs

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Various additives to the local anaesthetic have been used in an attempt to improve the quality of anaesthesia and operating conditions; mixtures of rapid onset and longer acting local anaesthetics, adrenaline, hyaluronidase and alkalinisation [2][3][4][5]. One disadvantage with peribulbar when compared with retrobulbar blockade is delayed or incomplete akinesia of the eye which may prolong the procedure and make the surgery more technically demanding [6].…”

mentioning

confidence: 99%

Peribulbar anaesthesia using a mixture of local anaesthetic and vecuronium

et al. 1998

View full text Add to dashboard Cite

SummaryThe aim of this double-blind, randomised study was to assess the effects of the addition of 0.5 mg of vecuronium bromide to a standard local anaesthetic mixture used for peribulbar anaesthesia. We studied 60 patients undergoing regional anaesthesia for intra-ocular surgery and were primarily interested in the quality of globe and lid akinesia. All received a mixture of 5 ml 2% lignocaine with 1:200 000 adrenaline, 5 ml 0.75% bupivacaine and 150 IU hyaluronidase with either 0.9% saline 0.25 ml (group A, n ¼ 30) or vecuronium bromide 0.25 ml (0.5 mg) (group B, n ¼ 30). Eye movements assessed at both 5 and 10 min were significantly reduced in the vecuronium group (group B) (p < 0.05). We conclude that the addition of vecuronium at a dose of 0.5 mg to the standard local anaesthetic mixture improves the quality of globe and lid akinesia.

show abstract

“…Among regional blocks, peribulbar block is a good choice as it provides efficient anesthesia with good lid and globe akinesia with low incidence of complications [1]. However it has a slow onset of action and frequent supplementations may be needed [2]. So many additives have been used have been used in peribulbar block to hasten the onset of akinesia and increase tissue diffusion such as hyaluronidase, [3] adrenaline, [4] clonidine, [5] corticosteroids, [6] sodium bicarbonate [7] and neuromuscular blocking agents [8].…”

Section: Introductionmentioning

confidence: 99%