V-Prechop nucleodissection technique feasibility in the phacoemulsification in dogs with cataracts. Clinical aspects and specular microscopy

Abstract

The aim of this study was to evaluate the feasibility of the V-Prechop nucleodissection technique in the phacoemulsification in dogs and the clinical aspects and of the specular microscopy in the postoperative period. Fourty three dogs of different breeds, males and females, aged 3 to 10 years, with mature (n=22) and immature (n=21) cataracts were used. After surgery, patients were evaluated weekly for visual acuity, intraocular pressure, and endothelial corneal cell density (by non-contact specular microscopy) and quantitative flare (by laser flare photometry) during different periods. The "V-prechop" technique presented technical difficulties in implementation in patients with a mature cataract. In selected cases of patients with an immature cataract, the technique can be employed, as the nuclei are softer, allowing confection of the linear fragments in “V” to be performed. In addition, the eyes of dogs with a mature cataract presented more intensive postoperative uveitis, probably related to the greater difficulty in conducting the "V" nucleodissection. There was decreased endothelial corneal cell density in dogs with mature and immature cataracts. This occurrence was greater in patients with a mature cataract, given the increased intraocular manipulation and surgical time due to the difficulty in performing the “V” nucleodissection. According to the results obtained, the “V-prechop” nucleodissection technique can be indicated in selective cases of dogs with an immature cataract.

Comparação do quantitativo de flare do aquoso entre as técnicas de fotometria à laser e avaliação subjetiva em cães submetidos à facoemulsificação

“…Não houve casos de ruptura da cápsula posterior, herniação vítrea, deslocamento do cristalino, descolamento de retina ou hemorragia intraocular intraoperatória, conforme descrito por Andrade et al (2020) (9) ; além disso, não houve complicações que aumentassem a inflamação intraocular. Entre as variáveis clínicas, foi observada percepção visual perceptível no pós-operatório imediato após o efeito anestésico, que persistiu durante todos os períodos de avaliação em ambos os grupos.…”

“…O procedimento cirúrgico (nucleodissecção em V-prechop) foi descrito anteriormente por Andrade et al (2020) (9) ; todas as cirurgias de catarata foram realizadas por um único cirurgião.…”

“…al. (2020) (9) avaliaram a viabilidade da técnica V-prechop de nucleodissecção na facoemulsificação e observaram que, embora esta técnica possa ser utilizada em casos seletivos de cães com cataratas imaturas, apresenta dificuldades técnicas para implementação em pacientes com cataratas maduras.…”

Hydrodissection to create conjunctival flaps in dogs with corneal ulcers

“…Clinical evaluations were conducted before the surgical procedure (T0) and after 24 h on post-operative day 1 (T1), day 7 (T7), and day 14 (T14). Blepharospasm, hyperemia, and conjunctival edema [ 18 ] were examined and classified as absent, mild, moderate, or severe. A blind assessment of the conjunctival scarring was performed by a surgeon and monitored based on post-operative photographs and on a visual analog scale from 1 to 3 (1 = excellent, 2 = good, and 3 = fair).…”

“…The use of this technique in many surgical specialties, such as thoracic surgery [ 8 ], cardiac surgery [ 9 , 10 ], urology [ 11 ], orthopedics [ 12 ], general surgery [ 13 , 14 ], otorhinolaryngology [ 15 ], and ophthalmology [ 16 , 17 ], has been reported. Hydrodissection has been used in phacoemulsification surgery to separate the lens cortex from its capsule [ 18 ], in the periocular region to facilitate dissection and reduce bleeding [ 19 ], and in the removal of bulbar conjunctiva adhered to the cornea after the construction of a 360°C flap [ 20 ]. The procedure for creating conjunctival flaps in the eyes of normal dogs has already been evaluated [ 21 ]; however, it has not yet been described in clinical situations.…”