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Correlations between exercising arterial blood gas values, tracheal wash findings and upper respiratory tract abnormalities in horses presented for poor performance.
Equine Vet J Suppl. 2006 AugEV

Abstract

REASONS FOR PERFORMING STUDY

There are limited data on the correlations between arterial blood gas (ABG) values, tracheal wash (TW) cytology and upper respiratory tract (URT) abnormalities.

OBJECTIVES

To identify horses with abnormal exercising ABG, and compare the proportions of horses with abnormal ABG and TW cytology, mucus or URT dysfunction with those with normal ABG results and abnormal TW cytology, mucus or URT dysfunction.

METHODS

Medical records of 813 horses presenting to the treadmill facility that had a complete treadmill examination, including ABG analysis, TW and URT endoscopy were selected. Diagnoses, ABG results, TW cytology and URT endoscopy were compared.

RESULTS

Two hundred and eleven horses met the study criteria of a complete treadmill examination and could have ABG evaluated. There were no significant differences in the age distribution of horses having normal and abnormal ABG or upper respiratory tract (URT) examinations. There was a significantly higher percentage of geldings with abnormal ABG analysis. In the horses with abnormal URT examinations, there were no differences in the proportion of horses having mucus vs. no mucus. However, in the horses with normal URT, there were a higher percentage of horses with visible mucus in the group with abnormal ABG analysis. The majority of horses had abnormal TW cytology and evidence of prior EIPH, with no differences in proportions between the groups.

CONCLUSIONS

Because such a large percentage of horses had evidence of inflammation and/or evidence of prior EIPH on TW cytology, it was not possible to determine the effect of these findings on gas exchange. Mucus was present in a larger percentage of cases with abnormal ABG analysis and normal URT examinations, suggesting that the presence of mucus may affect gas exchange. Standardbreds may be more likely to have abnormal gas exchange than Thoroughbreds. A larger number of horses is needed to determine the significance of these findings.

POTENTIAL RELEVANCE

Abnormal TW cytology and endoscopic visualised mucus may contribute to impairment of gas exchange, but they do not specifically predict abnormal ABG analysis.

Authors+Show Affiliations

Department of Clinical Studies, New Bolton Centre, University of Pennsylvania, 382 West Street Road, Kennett Square, Pennsylvania 19348, USA.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

17402477

Citation

Durando, M M., et al. "Correlations Between Exercising Arterial Blood Gas Values, Tracheal Wash Findings and Upper Respiratory Tract Abnormalities in Horses Presented for Poor Performance." Equine Veterinary Journal. Supplement, 2006, pp. 523-8.
Durando MM, Martin BB, Davidson EJ, et al. Correlations between exercising arterial blood gas values, tracheal wash findings and upper respiratory tract abnormalities in horses presented for poor performance. Equine Vet J Suppl. 2006.
Durando, M. M., Martin, B. B., Davidson, E. J., & Birks, E. K. (2006). Correlations between exercising arterial blood gas values, tracheal wash findings and upper respiratory tract abnormalities in horses presented for poor performance. Equine Veterinary Journal. Supplement, (36), 523-8.
Durando MM, et al. Correlations Between Exercising Arterial Blood Gas Values, Tracheal Wash Findings and Upper Respiratory Tract Abnormalities in Horses Presented for Poor Performance. Equine Vet J Suppl. 2006;(36)523-8. PubMed PMID: 17402477.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Correlations between exercising arterial blood gas values, tracheal wash findings and upper respiratory tract abnormalities in horses presented for poor performance. AU - Durando,M M, AU - Martin,B B, AU - Davidson,E J, AU - Birks,E K, PY - 2007/4/4/pubmed PY - 2007/5/3/medline PY - 2007/4/4/entrez SP - 523 EP - 8 JF - Equine veterinary journal. Supplement JO - Equine Vet J Suppl IS - 36 N2 - REASONS FOR PERFORMING STUDY: There are limited data on the correlations between arterial blood gas (ABG) values, tracheal wash (TW) cytology and upper respiratory tract (URT) abnormalities. OBJECTIVES: To identify horses with abnormal exercising ABG, and compare the proportions of horses with abnormal ABG and TW cytology, mucus or URT dysfunction with those with normal ABG results and abnormal TW cytology, mucus or URT dysfunction. METHODS: Medical records of 813 horses presenting to the treadmill facility that had a complete treadmill examination, including ABG analysis, TW and URT endoscopy were selected. Diagnoses, ABG results, TW cytology and URT endoscopy were compared. RESULTS: Two hundred and eleven horses met the study criteria of a complete treadmill examination and could have ABG evaluated. There were no significant differences in the age distribution of horses having normal and abnormal ABG or upper respiratory tract (URT) examinations. There was a significantly higher percentage of geldings with abnormal ABG analysis. In the horses with abnormal URT examinations, there were no differences in the proportion of horses having mucus vs. no mucus. However, in the horses with normal URT, there were a higher percentage of horses with visible mucus in the group with abnormal ABG analysis. The majority of horses had abnormal TW cytology and evidence of prior EIPH, with no differences in proportions between the groups. CONCLUSIONS: Because such a large percentage of horses had evidence of inflammation and/or evidence of prior EIPH on TW cytology, it was not possible to determine the effect of these findings on gas exchange. Mucus was present in a larger percentage of cases with abnormal ABG analysis and normal URT examinations, suggesting that the presence of mucus may affect gas exchange. Standardbreds may be more likely to have abnormal gas exchange than Thoroughbreds. A larger number of horses is needed to determine the significance of these findings. POTENTIAL RELEVANCE: Abnormal TW cytology and endoscopic visualised mucus may contribute to impairment of gas exchange, but they do not specifically predict abnormal ABG analysis. UR - https://www.unboundmedicine.com/medline/citation/17402477/Correlations_between_exercising_arterial_blood_gas_values_tracheal_wash_findings_and_upper_respiratory_tract_abnormalities_in_horses_presented_for_poor_performance_ L2 - https://doi.org/10.1111/j.2042-3306.2006.tb05598.x DB - PRIME DP - Unbound Medicine ER -