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Acta veterinaria Scandinavica1995; 36(4); 461-473; doi: 10.1186/BF03547661

A transtracheal catheter for recording the static tracheal pressure in the exercising horse.

Abstract: After giving an account of the principles of pressure measurement in flowing air and a review of the literature on tracheal catheters, the authors describe the construction, the introduction and the function of their own transtracheal catheter. This is a teflon catheter with several side-ports which is introduced into the cervical trachea by a guide technique. After introduction, the catheter is stiffened by the insertion of 2 steel wires. The catheter was studied in model experiments concerning: a) the ability to measure the static pressure in flowing air, and b) the dynamic accuracy of a recording system built up around the catheter. The results indicated that the intratracheal pressure sensed in exercising horses well reflected the static pressure, and that the dynamic accuracy of the recording system was good to about 60 Hz. The present technique of recording the intratracheal pressure was used on 122 occasions in 69 exercising horses with only one complication referable to the catheter occurring. The transtracheal route of catheterisation may be superior, as catheters introduced by this route do not appear to influence the function of the pharynx and larynx. In contrast, nasotracheal catheters that traverse the larynx, might interfere with the respiratory function. Författarna redogör för principerna vid tryckmätning i strömmande luft och gör en genomgång av litteraturen över tracheal k atetrar. Konstruktion, införande och funktion av deras egen transtracheal kateter beskrivs. Detta är en teflonkateter med ett flertal sidoöppningar. Den förs in i luftstrupen med hjälp av en guideteknik. Efter införandet förstyvas katetern med två metalltrådar. Katetern har studerats i modellförsök med avseende på: a. förmåga att mäta det statiska trycket i strömmande luft, och; b. den dynamiska exaktheten i ett registreringssystem uppbyggt kring katetern. Resultaten tyder på att det intratracheal a trycket registrerat hos arbetande hästar väl avspeglar det statiska trycket, och att den dynamiska exaktheten hos registreringssystemet var god upp till c:a 60 Hz. Den beskrivna tekniken for intratracheal tryckmätning användes vid 122 tillfällen på 69 hästar under arbete, med en komplikation som kan hänföras till katetern i endast ett fall. Den trans trachea la metoden för kateterisering synes överlägsen, eftersom en kateter införd med denna metod, i motsats till nasotracheala katetrar, ej tycks påverka funktionen i pharynx och larynx.
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Publication Date: 1995-01-01 PubMed ID: 8669374PubMed Central: PMC8095444DOI: 10.1186/BF03547661Google Scholar: Lookup
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Summary

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The research discusses a transtracheal catheter designed by the authors to accurately measure static tracheal pressure in exercising horses. The study finds that the catheter is able to capture accurate readings, without disturbing the respiratory function of the horses.

Overview of the Research

  • The paper begins with an overview of the principles of pressure measurement in flowing air and a literature review on tracheal catheters.
  • The authors then detail the construction, introduction, and function of their newly designed transtracheal catheter. Their catheter is made of Teflon and is introduced into the animal’s trachea using a guide technique.

Catheter Design and Functionality

  • The catheter has several side ports to increase efficiency and accuracy of pressure measurements.
  • Once introduced into the trachea, its structure is stiffened by the insertion of two steel wires.
  • The authors tested the ability of their catheter to measure static pressure in flowing air and the dynamic accuracy of a recording system built around the catheter.

Results of the Study

  • The findings indicated that the intratracheal pressure sensed in exercising horses accurately reflected the static pressure.
  • The dynamic accuracy of the recording system was found to be satisfactory up to about 60 Hz.
  • The researchers utilized their transtracheal pressure recording technique on 122 occasions on 69 exercising horses, with only one complication related to the catheter recorded.
  • The report suggests that the transtracheal route of catheterization may be superior because it does not appear to influence the function of the pharynx and larynx. In contrast to this, nasotracheal catheters (that traverse the larynx) may interfere with the respiratory function.

Cite This Article

APA
Roethlisberger-Holm K, Roepstorff L, Obel N. (1995). A transtracheal catheter for recording the static tracheal pressure in the exercising horse. Acta Vet Scand, 36(4), 461-473. https://doi.org/10.1186/BF03547661

Publication

Acta veterinaria Scandinavica
ISSN: 0044-605X
NlmUniqueID: 0370400
Country: England
Language: English
Volume: 36
Issue: 4
Pages: 461-473

Researcher Affiliations

Roethlisberger-Holm, K
  • Department of Medicine and Surgery, Swedish University of Agricultural Sciences, Uppsala, Sweden.
Roepstorff, L
    Obel, N

      MeSH Terms

      • Airway Resistance
      • Animals
      • Horses / physiology
      • Intubation, Intratracheal / methods
      • Intubation, Intratracheal / veterinary
      • Physical Conditioning, Animal
      • Pressure

      References

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      Citations

      This article has been cited 0 times.
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