427 results match your criteria retrobulbar block

Description of a novel ultrasound guided peribulbar block in horses: a cadaveric study.

J Vet Sci 2021 Mar;22(2):e22

Departamento de Medicina y Cirugía Animal, Facultad de Veterinaria, Universidad Cardenal Herrera-CEU, CEU Universities, Valencia 46115, Spain.

Background: Standing surgery in horses combining intravenous sedatives, analgesics and local anaesthesia is becoming more popular. Ultrasound guided (USG) peribulbar nerve block (PB) has been described in dogs and humans for facial and ocular surgery, reducing the risk of complications retrobulbar nerve block (RB).

Objective: To describe a technique for USG PB in horse cadavers. Read More

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Comparative study of silicone membrane simulator and animal eye models for sub-Tenon's block.

J Clin Monit Comput 2021 Feb 16. Epub 2021 Feb 16.

Department of Electrical Engineering, Indian Institute of Technology, Chennai, India.

To compare and assess silicone membrane-based sub-Tenon's block (STB) simulator and animal eye model (goat's eye) for practicing STB in terms of anatomical similarity and feel of texture of eye layers. The study included 34 participants (26 learners and 8 consultants) from tertiary ophthalmic centres. The participants were divided into groups A and B. Read More

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February 2021

Unexpected amaurosis occurring after peribulbar anesthesia: Exploring the causes in two cases.

Eur J Ophthalmol 2020 Dec 24:1120672120984399. Epub 2020 Dec 24.

Department of Ophthalmology, Croix-Rousse University Hospital, Hospices Civils de Lyon, University of Lyon 1, Lyon, France.

Peribulbar anesthesia (PB) is known to be safer than retrobulbar (RB) anesthesia. To our knowledge, no amaurosis has been described after PB. We report here the cases of two patients who underwent PB before membrane peeling. Read More

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December 2020

In-plane ultrasound-guided peribulbar block in the dog: an anatomical cadaver study.

Vet Anaesth Analg 2021 Mar 19;48(2):272-276. Epub 2020 Nov 19.

Department of Veterinary Medicine and Veterinary Surgery, Universidad CEU Cardenal Herrera, Valencia, Spain.

Objective: To describe a novel in-plane ultrasound (U/S)-guided temporal approach to peribulbar block in dogs.

Study Design: Prospective experimental cadaver study.

Animals: A group of 10 Beagle cadavers. Read More

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Voltage-gated sodium channel-dependent retroaxonal modulation of photoreceptor function during post-natal development in mice.

Dev Neurobiol 2020 Nov 28. Epub 2020 Nov 28.

Department of Ophthalmology and Visual Sciences, Dalhousie University, Halifax, NS, Canada.

Juvenile (postnatal day 16) mice lacking Na 1.6 channels (null-mutant Scn8a ) have reduced photoreceptor function, which is unexpected given that Na channels have not been detected in mouse photoreceptors and do not contribute appreciably to photoreceptor function in adults. We demonstrate that acute block of Na channels with intravitreal TTX in juvenile (P16) wild-type mice has no effect on photoreceptor function. Read More

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November 2020

Special communication for deaf patients during topical anesthesia cataract surgery.

Fuxiang Zhang

Am J Ophthalmol Case Rep 2020 Dec 1;20:100940. Epub 2020 Oct 1.

Fuxiang ZhangHenry Ford Health System, Department of Ophthalmology, 22395 Eureka Rd, Taylor, MI 48180, USA.

Purpose: To report a new method for communication with deaf patients during topical anesthetic cataract surgery.

Observation: Due to communication difficulty, topical anesthesia was traditionally considered by many cataract surgeons as a contraindication for deaf patients. Retrobulbar/peribulbar-block anesthesia or general anesthesia were recommended. Read More

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December 2020

A modified retrobulbar block for microphthalmia using ultrasound guidance in a cat.

Vet Anaesth Analg 2020 Nov 31;47(6):846-847. Epub 2020 Aug 31.

Dpto. Medicina y Cirugía Animal, Hospital Clínico Veterinario, Facultad de Veterinaria, Universidad Cardenal Herrera CEU, CEU Universities, Valencia, Spain.

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November 2020

Comparative Study of Retrobulbar Block versus Ketamine Infusion during Eye Enucleation/Evisceration (Randomized Controlled Trial).

Anesth Essays Res 2020 Jan-Mar;14(1):92-99. Epub 2020 Feb 14.

Department of Anesthesia, Faculty of Medicine, Cairo University, Cairo, Egypt.

Background: The aim of this study is to compare the safety and efficacy of retrobulbar block versus intraoperative ketamine infusion in eye enucleation or evisceration under general anesthesia.

Materials And Methods: Forty-five patients belonging to American Society of Anesthesiologists Physical Status I and II undergoing eye enucleation or evisceration were randomly allocated to three equal groups (15 patients each). General anesthesia was used as the standardized technique in all patients. Read More

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February 2020

Ultrasound detection of iatrogenic injury during peribulbar eye block: a cadaveric study.

Reg Anesth Pain Med 2020 Sep 15;45(9):740-743. Epub 2020 Jul 15.

Centre for Anatomy and Human Identification, University of Dundee, Dundee, UK.

Background: Ophthalmic eye blocks, such as retrobulbar, peribulbar and sub-Tenon's, are traditionally conducted "blind". Complications are rare but potentially devastating. Life-threatening complications include brain stem anesthesia and local anesthetic toxicity, whereas sight-threatening complications include globe perforation, optic nerve damage and ocular muscle damage. Read More

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September 2020

Retrospective analysis of complications associated with retrobulbar bupivacaine in dogs undergoing enucleation surgery.

Vet Anaesth Analg 2020 Sep 6;47(5):588-594. Epub 2020 May 6.

Department of Biostatistics and Medical Informatics, University of Wisconsin - Madison, Madison, WI, USA.

Objective: To investigate complications associated with, and without, bupivacaine retrobulbar local anesthesia in dogs undergoing unilateral enucleation surgery.

Study Design: Retrospective, observational study.

Animals: A total of 167 dogs underwent unilateral enucleation surgery via a transpalpebral approach. Read More

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September 2020

Supraorbital Neuralgia Associated With Thyroid Eye Disease.

Ophthalmic Plast Reconstr Surg 2020 Jun 17. Epub 2020 Jun 17.

Plastic Eye Surgery Associates, Houston, Texas, U.S.A.

Purpose: To identify the relationship between thyroid eye disease (TED) and supraorbital neuralgia (SON) and establish a reliable approach to the diagnosis and management of TED-associated SON.

Methods: This retrospective study included 1,126 patients. Demographics, active and inactive phase status and duration, and reactivation rate were noted. Read More

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Repair of Rhegmatogenous Retinal Detachment Following Globe Perforation by Retrobulbar Anesthesia.

Ophthalmic Surg Lasers Imaging Retina 2020 04;51(4):249-251

Globe perforation following retrobulbar or peribulbar anesthetic injection is a rare but dreaded complication that often results in suboptimal visual outcomes. This video describes a 72-year-old woman who sustained a globe perforation during retrobulbar block in the setting of cataract extraction and later developed a retinal detachment. The retina was repaired with pars plana vitrectomy and silicone oil, resulting in a favorable visual outcome. Read More

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One-year outcome of low dose laser cyclophotocoagulation for capsular tension ring-induced malignant glaucoma: A case report.

Medicine (Baltimore) 2020 Feb;99(6):e18836

The Eye Hospital of Wenzhou Medical University, Zhejiang Eye Hospital.

Rationale: Malignant glaucoma is a refractory glaucoma which often relentlessly worsened despite conventional therapy. Ultrasonographic biomicroscopy always cannot show the ciliary-block of malignant glaucoma. We report a case of capsular tension ring induced ciliary-block and successfully treated by low dose laser cyclophotocoagulation, with 1-year follow-up. Read More

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February 2020

Effect of pterygopalatine blockade on perioperative stress and inflammatory outcomes following paediatric cataract surgery.

Reg Anesth Pain Med 2020 03 20;45(3):204-208. Epub 2020 Jan 20.

Anesthesiology, Irkutsk Branch of S. Fyodorov Eye Microsurgery Federal State Institution, Irkutsk, Russian Federation.

Background: General anesthesia is required to perform pediatric cataract surgery. To reduce severity of surgical intervention and postoperative complications, regional techniques have been concomitantly used. The traditional regional ophthalmic techniques are retrobulbar, peribulbar and sub-Tenon blocks, which present some technical difficulties and associated complication risks. Read More

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Efficacy and Safety of a Novel Blunt Cannula Trans-Sub-Tenon's Retrobulbar Block for Vitreoretinal Surgery.

Middle East Afr J Ophthalmol 2019 Jul-Sep;26(3):163-167. Epub 2019 Sep 30.

Cardiff Eye Unit, University Hospital of Wales, Cardiff, Wales.

Purpose: To evaluate a novel trans-sub-Tenon's retrobulbar block (TSTRB) compared to sub-Tenon's block (STB) and peribulbar block (PBB) anesthesia for vitreoretinal surgery.

Methods: This study was a prospective evaluation of cases undergoing TSTRB, STB, or PBB. The Kallio scale and Brahma scales were used to score hemorrhage and extraocular motility, respectively. Read More

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January 2020

A preoperative bupivacaine retrobulbar block offers superior antinociception compared with an intraoperative splash block in dogs undergoing enucleation.

Vet Ophthalmol 2020 Mar 30;23(2):225-233. Epub 2019 Sep 30.

Comparative Ophthalmology, Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC, USA.

Purpose: Investigate nociception differences in dogs undergoing enucleation administered bupivacaine either via preoperative retrobulbar block (pRB) or intraoperative splash block (iSB).

Methods: Prospective, randomized, double-masked, clinical comparison study. Dogs undergoing unilateral enucleation were randomized to two groups: one received bupivacaine pRB and saline iSB of the same volume, and the other received saline pRB and bupivacaine iSB. Read More

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Patients' Experience of Anxiety and Pain during Retrobulbar Injections prior to Vitrectomy.

J Ophthalmol 2019 31;2019:8098765. Epub 2019 Jul 31.

Department of Ophthalmology, Rambam Health Care Campus, Haifa, Israel.

Purpose: The purpose of this study was to evaluate the correlation between pain associated with retrobulbar block and anxiety levels before the injection.

Methods: This prospective observational, noninterventional study included consecutive patients who received a retrobulbar block by a single surgeon prior to undergoing 25G PPV at the Department of Ophthalmology, Rambam Health Care Campus, between April 2016 and August 2017. Patients plotted their anxiety levels (scale 0-10) using the visual analogue scale for anxiety (VASA), and immediately after receiving the injection, they plotted their experienced level of pain (scale 0-10) using the visual analogue scale for pain (VAS), with scores ≥7 defined as severe. Read More

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Prevalence of and covariates associated with the oculocardiac reflex occurring in dogs during enucleation.

J Am Vet Med Assoc 2019 08;255(4):454-458

Objective: To determine the prevalence of and covariates associated with the oculocardiac reflex (OCR) occurring in dogs during enucleations.

Sample: 145 dogs that underwent enucleation at 2 veterinary teaching hospitals between January 2010 and June 2015.

Procedures: Information was collected from the medical records of included dogs regarding age and body weight at hospital admission, breed (for classification of brachycephalic status), and whether they had received anticholinergic drugs or a retrobulbar nerve block (RNB) prior to enucleation. Read More

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Contralateral amaurosis after a retrobulbar block.

Am J Ophthalmol Case Rep 2019 Sep 7;15:100487. Epub 2019 Jun 7.

Department of Ophthalmology and Visual Science, The University of Chicago, Chicago, IL, USA.

Purpose: To describe and discuss the workup and management of a rare complication of retrobulbar anesthesia, as well as CT and MRI findings of this complication.

Observations: The patient underwent uncomplicated pars plana vitrectomy with membrane peel for epiretinal membrane removal. Shortly after completion of surgery, the patient noted that he could not see out of his non-operated eye. Read More

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September 2019

A Retrospective Study of the Incidence and Management of Complications Associated With Regional Nerve Blocks in Equine Dental Patients.

J Vet Dent 2019 Mar;36(1):40-45

1 Rood and Riddle Equine Hospital, Lexington, KY, USA.

Regional anesthesia of the equine head is commonly performed to allow oral extraction of diseased teeth in the standing horse. The use of 4 blocks (infraorbital nerve, maxillary nerve, mental nerve, and mandibular nerve) is well documented for desensitization of dental quadrants for oral surgery for exodontia, but descriptions of associated complications are limited. A total of 270 regional nerve blocks were performed on 162 equine patients in a second opinion referral hospital setting. Read More

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Retrobulbar dexmedetomidine in pediatric vitreoretinal surgery eliminates the need for intraoperative fentanyl and postoperative analgesia: A randomized controlled study.

Indian J Ophthalmol 2019 06;67(6):922-927

Department of Anesthesiology, The Children's Hospital, Zhejiang University School of Medicine, Hangzhou, China.

Purpose: This study evaluated the efficacy of retrobulbar ropivacaine plus dexmedetomidine compared with systemic fentanyl in pediatric vitreoretinal (VR) surgery.

Methods: This prospective double-blind, randomized controlled study was performed in 60 children undergoing VR surgery, age from 2 to 7 years. After general anesthesia, the following procedure was administrated: (1) retrobulbar block with 0. Read More

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Brainstem Anaesthesia after Retrobulbar Block.

Open Med (Wars) 2019 2;14:287-291. Epub 2019 Mar 2.

Medical Faculty, University of Ljubljana, Ljubljana, Slovenia.

Regional anaesthesia techniques in ophthalmology are usually utilized for day case surgery. During various procedures, profound akinesia of the eye and anaesthesia of the surgical site are required, both of which are achieved with retrobulbar block. Due to the anatomy of the eye, life-threatening complications are possible. Read More

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Efficacy of Preoperative Administration of Acetaminophen and Melatonin on Retrobulbar Block Associated Pain in Cataract Surgery: A Letter to Editor.

Anesth Pain Med 2019 Feb 24;9(1):e84957. Epub 2019 Feb 24.

Department of Anesthesiology and Critical Care, Qom University of Medical Sciences, Qom, Iran.

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February 2019

Reduction of oculocardiac reflex with Tetracaine eye drop in strabismus surgery.

Strabismus 2019 03 4;27(1):1-5. Epub 2019 Mar 4.

b School of medicine , Isfahan University of Medical Sciences , Isfahan.

Introduction: Recently, to reduce the incidence of oculocardiac reflex (OCR) in strabismus surgery, retrobulbar block and anticholinergic drugs or local anesthesia are also used. The present study evaluated the effects of Tetracaine eye drop as a topical nerve blocker on OCR during strabismus surgery.

Methods And Materials: In this randomized trial, 70 strabismus surgery candidates were randomly divided into placebo or synthetic teardrop (E) and Tetracaine eye drop (T) groups, so 3 drops of each solution were dropped in four directions of patients' eye immediately after applying anesthesia and before surgery. Read More

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Ultrasound-guided posterior extraconal block in the dog: anatomical study in cadavers.

Vet Anaesth Analg 2019 Mar 11;46(2):246-250. Epub 2018 Oct 11.

The Royal Veterinary College, Hatfield, UK.

Objective: To describe a novel ultrasound-guided posterior extraconal block in the dog.

Study Design: Prospective experimental cadaveric study.

Animals: A total of 13 Beagle Cross cadaver heads. Read More

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Real-time ultrasound-guided retrobulbar block vs blind technique for cataract surgery (pilot study).

Local Reg Anesth 2018 6;11:123-128. Epub 2018 Dec 6.

Asiout University, Asyut, Egypt.

Background: Retrobulbar regional eye block aims to ensure eye globe akinesia and anesthesia during ophthalmic surgery, and despite the rarity of occurrence of complications due to the blind needle passage while performing either peribulbar or retrobulbar block, some of them are serious and may be life threatening.

Aim: The aim of this study was to estimate the accuracy and safety of real-time ultrasound-guided retrobulbar regional anesthesia in comparison with the blind technique for cataract surgery.

Design: This was a prospective randomized controlled trial. Read More

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December 2018

Efficacy of Preoperative Administration of Acetaminophen and Melatonin on Retrobulbar Block Associated Pain in Cataract Surgery.

Anesth Pain Med 2018 Oct 11;8(5):e61041. Epub 2018 Sep 11.

Anesthesiology Research Center, Department of Anesthesiology, Al-Zahral Hospital, Guilan University of Medical Sciences, Rasht , Iran.

Background: Retrobulbar block is one of the chosen methods for local anesthesia in cataract surgery. Since it is a painful procedure, using analgesic and sedative drugs is recommended. Current medications have side effects and evaluating of new drugs or new uses of existing safer drugs is necessary. Read More

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October 2018

A review of ophthalmic local and regional anesthesia in dogs and cats.

Vet Anaesth Analg 2019 Jan 7;46(1):14-27. Epub 2018 Nov 7.

Koret School of Veterinary Medicine, The Hebrew University of Jerusalem, Rehovot, Israel. Electronic address:

Objective: Orbital and globe surgeries are commonly performed in companion animals and are considered to cause moderate to severe pain. Regional anesthesia techniques can provide complete sensory blockade, analgesia for painful procedures and improve surgical conditions. The purpose of this review is to summarize local and regional anesthesia techniques for ophthalmic surgery in dogs and cats with emphasis on veterinary publications in the past 12 years. Read More

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January 2019

Learning medial canthus retrobulbar anaesthesia for eye surgery: Ophthalmic surgeons versus anaesthetists.

Anaesth Crit Care Pain Med 2019 04 2;38(2):183-184. Epub 2018 Jun 2.

Department of anaesthesia and intensive care, Hôpital Cochin, Assistance Publique-Hôpitaux de Paris, 75014 Paris, France.

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