Equis ISSN 2398-2977
Ethmoid: hematoma - chemical ablation
Synonym(s): Transendoscopic chemical ablation
Contributor(s): Tim Brazil, David Moll, Dwayne Rodgerson
Introduction
- Formaldehyde coagulates proteins by hydrolysis → reduction in tissue volume and reduced hemorrhage.
- Ethmoid hematomas Ethmoid: hematoma cause clinical signs relating to impingement in the paranasal sinuses and nasal passages, secondary infection and spontaneous bleeds.
Uses
- Reduction in mass of ethmoid hematoma Ethmoid: hematoma :
- Small lesions ideal.
- Location in the nasal passage ideal.
- Follow up treatment of recurring lesions that have been surgically ablated.
Advantages
- Done in standing sedated horse Anesthesia: standing chemical restraint .
- Minimum specialized equipment required.
- Can be repeated.
- Easy to evaluate.
- High percentage of cases result in remission of clinical signs.
Disadvantages
- Formaldehyde (formalin) is toxic and irritant.
- 60% complete resolution of lesion by endoscopic evaluation.
- Access by endoscopy may be inadequate → need to use trephine Head: trephination and/or bone flap Paranasal sinus: bone flap technique to access lesions projecting into paranasal sinus.
- Not suitable for large lesions that are causing acute clinical signs.
Requirements
This article is available in full to registered subscribers
Sign up now to purchase a 30 day trial, or
Login
Preparation
This article is available in full to registered subscribers
Sign up now to purchase a 30 day trial, or
Login
Procedure
This article is available in full to registered subscribers
Sign up now to purchase a 30 day trial, or
Login
Outcomes
This article is available in full to registered subscribers
Sign up now to purchase a 30 day trial, or
Login
Prognosis
- Guarded: recurrence of lesions is likely.
Further Reading
Publications
Refereed papers
- Recent references from PubMed and VetMedResource.
- Schumacher J et al (1998) Transendoscopic chemical ablation of progressive ethmoidal hematomas in standing horses. Vet Surg 27, 175-181 (Detailed description of the technique and case results) PubMed.
- Bell B T, Baker G J, Abbott L C, Foreman J H & Kneller S K (1995) The macroscopic vascular anatomy of the equine ethmoidal area. Anat Histol Embryol 24 (1), 39-45 PubMed.