The influence of perfusate volume on antimicrobial concentration in synovial fluid following intravenous regional limb perfusion in the standing horse.
- Journal Article
- Randomized Controlled Trial
- Research Support
- Non-U.S. Gov't
Summary
The study investigates how the volume of a perfusate, an intravenously injected fluid, influences the concentration of the antibiotic gentamicin in the synovial fluid in horse’s limbs. The research found that varying the volume did not significantly impact the antibiotic concentration, although the lowest volume had the highest concentration of gentamicin.
Study design and groups
In the study, the front limbs of 9 horses were used. These limbs were randomly divided into three groups, each with different volumes of perfusate. These were 10 mL (Group 1), 30 mL (Group 2), or 60 mL (Group 3).
- A tourniquet was placed below the carpus (wrist of the horse) in each case.
- Each limb was then perfused with gentamicin, an antibacterial medication, diluted to the assigned volume. This was done through a catheter placed in the lateral palmar digital vein near the proximal sesamoid bones (bones at the back of the limb, just above the hoof).
Data collection and analysis
To measure the concentration of gentamicin in the synovial fluid, the fluid found in the joints, samples were collected from the metacarpophalangeal joint (the joint between the metacarpal bone and the first phalanx, or digit) 30 minutes after perfusion.
- After sample collection, the tourniquet was removed.
- Gentamicin concentration in the synovial fluid samples was determined using a fluorescence polarization immunoassay, a method that relies on the property of polarization of fluorescent light to detect the amount of a specific substance in a sample.
Findings of the study
The study found no significant statistical differences in the antibiotic concentrations found in the synovial fluid among the three different perfusate volumes.
- Interestingly, the group with the smallest volume of perfusate (Group 1 with 10 mL) had the highest concentration of gentamicin (125.9 μg/mL).
- This was compared to the medium volume group (Group 2 with 30 mL) which had a lower concentration (82.7 μg/mL).
- The lowest concentration was seen in the largest volume group (Group 3 with 60 mL), which measured 56.1 μg/mL.
This suggests that, in the specific case of intravenous regional limb perfusion, lower volumes may result in higher concentrations of the antibiotic in the synovial fluid. However, the lack of statistical significance means these results should be treated cautiously. Further studies with larger sample sizes may be needed to confirm these findings.
Cite This Article
Publication
Researcher Affiliations
- Peterson and Smith Equine Hospital, 4747 SW 60th Avenue, Ocala, Florida 34474, USA.
MeSH Terms
- Administration, Intravenous
- Animals
- Anti-Bacterial Agents / administration & dosage
- Anti-Bacterial Agents / pharmacokinetics
- Female
- Forelimb
- Gentamicins / administration & dosage
- Gentamicins / pharmacokinetics
- Horses
- Perfusion / methods
- Perfusion / veterinary
- Synovial Fluid / chemistry
- Tissue Distribution
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Citations
This article has been cited 7 times.- Redding LE, Elzer EJ, Ortved KF. Effects of regional limb perfusion technique on concentrations of antibiotic achieved at the target site: A meta-analysis. PLoS One 2022;17(4):e0265971.
- Vajs T, Nekouei O, Biermann NM. A Descriptive Study of the Clinical Presentation, Management, and Outcome of Horses with Acute Soft Tissue Trauma of the Tarsus and the Association with Synovial Involvement. Animals (Basel) 2022 Feb 21;12(4).
- Bonilla AG, Causeret L, Torrent-Crosa A. Pharmacokinetics of ceftiofur in the metacarpophalangeal joint after standing intravenous regional limb perfusion in horses. Can Vet J 2021 Sep;62(9):975-981.
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- Dahan R, Oreff GL, Tatz AJ, Raz T, Britzi M, Kelmer G. Pharmacokinetics of regional limb perfusion using a combination of amikacin and penicillin in standing horses. Can Vet J 2019 Mar;60(3):294-299.
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