Morphological aspects of tympanic bulla after lateral osteotomy in cats

Silva, Adelina Maria da; Souza, Wilson Machado de; Carvalho, Roberto Gameiro de; Machado, Gisele Fabrino; Perri, Sílvia Helena Venturoli

doi:10.1590/s0102-86502008000200014

Cited by 3 publications

(3 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…6 However, previous studies in feline patients have shown that cats with neoplastic or polypoid disease can have secondary low-grade bacterial otitis associated with their disease and can have persistent aural secretions after removal of these growths. 13,17,18 Previous reports of feline cholesteatoma 19 also suggest that development of the acquired form of this disease may be possible in cats undergoing TECA-LBO without complete epithelial debridement. Most ear canal tumors in cats are malignant and recurrence is possible with incomplete excision, 20 and aural polyps are also prone to regrowth, especially in the presence of continued inflammation or infection; 21 in both of these situations, full epithelial ablation may be important for removing all traces of disease intraoperatively.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of endoscopic-assisted feline lateral bulla osteotomy: a cadaveric study

Enright,

Cole,

Hatfield

2023

Journal of Feline Medicine and Surgery

View full text Add to dashboard Cite

Objectives The aims of the study were to investigate if feline middle ear anatomy can be visualized using endoscopy via a lateral bulla approach and to determine if scope-assistance increases rates of successful entry into the hypotympanum during feline total ear canal ablation and lateral bulla osteotomy (TECA-LBO). Methods A total of 13 feline cadaver heads underwent CT to confirm the absence of pre-existing middle ear disease. For each head, an electronic coin toss was used to determine which ear would undergo endoscope-assisted TECA-LBO; a traditional TECA-LBO without the use of the scope was performed on the contralateral side. In endoscope-assisted procedures, a 1.9 mm scope was intermittently inserted into the tympanic bulla via a lateral bulla approach and used to identify middle ear structures, visualize the bony septum and confirm entry into the hypotympanum. After the bilateral TECA-LBO, the cadaver heads were imaged again and assessed for evidence of entry through the septum. Results Soft tissue and osseus structures of the middle ear were readily visualized with a 1.9 mm scope. Success rates for entry into the hypotympanum were high between both endoscope-assisted and traditional procedures, with entry confirmed for 12/13 ears in each group. Conclusions and relevance Endoscope assistance can facilitate the identification and examination of middle ear structures but does not appear to increase the success rate of entry into the hypotympanum during feline TECA-LBO, as entry through the bony septum was consistently accomplished even without scope-assisted visualization. Alternative benefits to scope assistance may exist, and future studies to elucidate its impact on rates of intraoperative trauma to middle ear structures are indicated.

show abstract

Section: Discussionmentioning

confidence: 99%

Evaluation of endoscopic-assisted feline lateral bulla osteotomy: a cadaveric study

Enright,

Cole,

Hatfield

2023

Journal of Feline Medicine and Surgery

View full text Add to dashboard Cite

show abstract

“…An experimental study examining morphologic aspects of the tympanic bulla after TECA-LBO in 20 cats revealed incomplete curettage and aural secretions in 9/20 cats postoperatively. 11 These cats were purpose-bred, had no preoperative middle ear disease and were euthanized at 8 and 16 weeks postoperatively so development of long-term, postoperative complications could not be assessed. In the largest study of 44 cats receiving a TECA-LBO, no postoperative periaural abscessation was reported.…”

Section: Discussionmentioning

confidence: 99%

“…10 Information regarding procedural methodology of feline TECA-LBOs is sparse, with few studies reported in the literature or referenced in veterinary textbooks. 10,11…”

Section: Introductionmentioning

confidence: 99%

Experience level as a predictor of entry into the hypotympanum during feline total ear canal ablation and lateral bulla osteotomy

Mehrkens

Townsend

Cooley

et al. 2021

Journal of Feline Medicine and Surgery

View full text Add to dashboard Cite

Objectives The study hypotheses were as follows: (1) owing to the unique anatomy of the feline middle ear, the hypotympanum would be entered in less than 100% of cats during total ear canal ablation and lateral bulla osteotomies (TECA-LBOs); and (2) incomplete penetration of the septum and subsequent failure to enter the hypotympanum is more likely to occur in surgeries performed by a novice surgeon when compared with an experienced surgeon and may be under-recognized. Methods Head CT was performed in 12 feline cadavers to confirm absence of gross ear disease. A novice surgeon and an experienced surgeon were randomly assigned to perform TECA-LBO on the left or right ear. Surgeons were blinded to each other’s surgical technique. CT of cadavers was performed after the procedure. Successful penetration of the septum, entry into the hypotympanic cavity and amount of bone removed in bulla osteotomy, quantified via CT, were compared between the novice surgeon and experienced surgeon. Results The novice surgeon entered the hypotympanum in 3/12 (25%) procedures, compared with 9/12 (75%) procedures performed by the experienced surgeon. The experienced surgeon performed a larger osteotomy than the novice surgeon (3301 mm vs 1376 mm, P<0.0023). Regardless of surgeon experience, more bone was removed in surgeries in which the hypotympanum was entered. Conclusions and relevance Our results underscore the need for familiarity with feline middle ear anatomy when performing TECA-LBOs. Postoperative CT is recommended for novice surgeons to confirm entry into the hypotympanum.

show abstract

Transoral ventral tympanic bulla osteotomy in cats: 13 cases (2016–2019)

Moissonnier

Blondel

Manou³

et al. 2022

javma

View full text Add to dashboard Cite

OBJECTIVE To analyze the results of transoral ventral bulla osteotomy (TOVBO) in cats. ANIMALS 13 client-owned cats treated by TOVBO between February 2016 and February 2019. PROCEDURES Medical records of cats with a diagnosis of middle ear disease (MED) that underwent TOVBO were reviewed. The procedure was similar to the one described for dogs. Short-term follow-up was obtained via clinical examination before discharge and at day 15 postoperatively. Long-term follow-up was performed via telephone interview. RESULTS 13 cats (age range, 8 months to 12 years) underwent unilateral (n = 10) or bilateral (3) TOVBO (16) for the treatment of tympanic bulla (TB) infection (10), nasopharyngeal inflammatory polyps (5), or bullet retrieval from the TB (1). There were no intraoperative complications. One cat with a poor preoperative status died at postoperative day 3 from pneumonia. Eight cats experienced postoperative complications including head tilt (n = 2), Horner syndrome (3), loss of appetite (2), and temporary blindness (1). Collected samples confirmed the presence of nasopharyngeal inflammatory polyps (5), or otitis media (8). Six months after surgical intervention, 9 cats were free of MED signs. CLINICAL RELEVANCE This oral approach provided a good access to the TB in all cases. The complications observed after TOVBO were similar to those for VBO. In cats, TOVBO seems to be an acceptable and safe minimally invasive alternative to the other approaches of the TB to address MED.

show abstract

Morphological aspects of tympanic bulla after lateral osteotomy in cats

Cited by 3 publications

References 10 publications

Evaluation of endoscopic-assisted feline lateral bulla osteotomy: a cadaveric study

Evaluation of endoscopic-assisted feline lateral bulla osteotomy: a cadaveric study

Experience level as a predictor of entry into the hypotympanum during feline total ear canal ablation and lateral bulla osteotomy

Transoral ventral tympanic bulla osteotomy in cats: 13 cases (2016–2019)

Contact Info

Product

Resources

About