Analyze Diet
Veterinary anaesthesia and analgesia2018; 46(1); 4-13; doi: 10.1016/j.vaa.2018.08.005

How to score sedation and adjust the administration rate of sedatives in horses: a literature review and introduction of the Ghent Sedation Algorithm.

Abstract: To summarize the different methods used to assess sedation and/or adjust the dose or administration rate of alpha-2 agonists in horses and to propose an algorithm to adjust the administration rate of a constant rate infusion of an alpha-2 agonist in horses. Methods: PubMed and Web of Science; search terms: horse, sedation and score. Conclusions: Most authors distinguish between sedation depth, sedation quality and degree of ataxia. These three features are evaluated using scoring systems similar to those classically used to assess pain, i.e. simple descriptive scales, numerical rating scales (NRS), visual analogue scales and/or multifactorial sedation scales. In addition, head height above the ground is often used as a measure of the depth of sedation. Very few authors have described how to adjust the administration rate or dose of alpha-2 agonists. Based on the available literature, the Ghent Sedation Algorithm was developed, which assigns scores (NRS) for degree of ataxia, sedation depth and surgical conditions, and uses these to prescribe changes in the administration rate of constant rate infusions of alpha-2 agonists. Studies are needed to validate this algorithm.
Publication Date: 2018-09-19 PubMed ID: 30528671DOI: 10.1016/j.vaa.2018.08.005Google Scholar: Lookup
The Equine Research Bank provides access to a large database of publicly available scientific literature. Inclusion in the Research Bank does not imply endorsement of study methods or findings by Mad Barn.
  • Journal Article
  • Review

Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

The research is a literature review highlighting various methods used to assess and administer sedation to horses. This concludes by proposing a new algorithm, called the Ghent Sedation Algorithm, for adjusting the administration rate of a specific sedative in horses.

Research Methodology

  • The researchers carried out a literature review using databases such as PubMed and Web of Science.
  • They used the search terms horse, sedation, and score to extract relevant studies for the review.
  • The aim was to understand different methodologies used for scoring sedation and adjusting the doses of alpha-2 agonists in horses.

Results and Findings

  • The team discovered that most authors differentiate between sedation depth, sedation quality, and degree of ataxia (loss of full control of bodily movements).
  • These features are usually evaluated using scoring systems akin to those used for measuring pain. Some examples include simple descriptive scales, numerical rating scales (NRS), visual analogue scales, and multifactorial sedation scales.
  • The researchers found that the height of the horse’s head above the ground is frequently used as a measure of sedation depth.
  • However, they discovered that very few authors have described precise methods for adjusting the administration rate or dose of alpha-2 agonists for horses.

Development of Ghent Sedation Algorithm

  • Taking into consideration the literature, the Ghent Sedation Algorithm was invented.
  • This algorithm assigns numerical rating scores (NRS) for the degree of ataxia, depth of sedation, and surgical conditions. The results are then used to recommend adjustments in the administration rate of constant rate infusions of alpha-2 agonists.
  • The algorithm provides a systematic method for controlling the dosage and administration rate of alpha-2 agonists, contributing to safer and more effective sedation processes in horses.

Future Research

  • Although this paper introduced a new, potentially more effective method for administering sedation to horses, its real-world effectiveness still needs validation.
  • Further studies are required to test the Ghent Sedation Algorithm and confirm its effectiveness and safety in practical settings.

Cite This Article

APA
Schauvliege S, Cuypers C, Michielsen A, Gasthuys F, Gozalo-Marcilla M. (2018). How to score sedation and adjust the administration rate of sedatives in horses: a literature review and introduction of the Ghent Sedation Algorithm. Vet Anaesth Analg, 46(1), 4-13. https://doi.org/10.1016/j.vaa.2018.08.005

Publication

ISSN: 1467-2995
NlmUniqueID: 100956422
Country: United States
Language: English
Volume: 46
Issue: 1
Pages: 4-13
PII: S1467-2987(18)30217-4

Researcher Affiliations

Schauvliege, Stijn
  • Department of Surgery and Anaesthesia of Domestic Animals, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium. Electronic address: Stijn.Schauvliege@UGent.be.
Cuypers, Charlotte
  • Department of Surgery and Anaesthesia of Domestic Animals, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium.
Michielsen, Anneleen
  • Department of Surgery and Anaesthesia of Domestic Animals, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium.
Gasthuys, Frank
  • Department of Surgery and Anaesthesia of Domestic Animals, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium.
Gozalo-Marcilla, Miguel
  • Department of Surgery and Anaesthesia of Domestic Animals, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium; Department of Veterinary Surgery and Anaesthesiology, Faculty of Veterinary Medicine and Animal Science, São Paulo State University (UNESP), Botucatu, SP, Brazil.

MeSH Terms

  • Adrenergic alpha-2 Receptor Agonists / administration & dosage
  • Adrenergic alpha-2 Receptor Agonists / pharmacology
  • Algorithms
  • Animals
  • Conscious Sedation / veterinary
  • Dose-Response Relationship, Drug
  • Horses / physiology
  • Hypnotics and Sedatives / administration & dosage
  • Hypnotics and Sedatives / pharmacology
  • Infusions, Intravenous / veterinary

Citations

This article has been cited 19 times.
  1. Narinx F, Monclin S, Sauvage A, Vercruysse E, Heimann M, Alloway E, Vandersmissen M, Grauwels M. Identification of an ectopic periorbital lymph node in two horses. Open Vet J 2022 Sep-Oct;12(5):768-773.
    doi: 10.5455/OVJ.2022.v12.i5.23pubmed: 36589395google scholar: lookup
  2. Cock G, Blakeney Z, Hernandez JA, DeNotta S. Opioid-free sedation for atlantoaxial cerebrospinal fluid collection in adult horses. J Vet Intern Med 2022 Sep;36(5):1812-1819.
    doi: 10.1111/jvim.16450pubmed: 35639966google scholar: lookup
  3. Gold JR, Grubb TL, Cox S, Malavasi L, Villarino NL. Pharmacokinetics and pharmacodynamics of repeat dosing of gabapentin in adult horses. J Vet Intern Med 2022 Mar;36(2):792-797.
    doi: 10.1111/jvim.16386pubmed: 35150014google scholar: lookup
  4. Vullo C, Tambella AM, Meligrana M, Catone G. Analgesic and Sedative Effects of Epidural Lidocaine-Xylazine in Elective Bilateral Laparoscopic Ovariectomy in Standing Mule Mares. Animals (Basel) 2021 Aug 17;11(8).
    doi: 10.3390/ani11082419pubmed: 34438877google scholar: lookup
  5. Troya-Portillo L, López-Sanromán J, Villalba-Orero M, Santiago-Llorente I. Cardiorespiratory, Sedative and Antinociceptive Effects of a Medetomidine Constant Rate Infusion with Morphine, Ketamine or Both. Animals (Basel) 2021 Jul 13;11(7).
    doi: 10.3390/ani11072081pubmed: 34359209google scholar: lookup
  6. de Oliveira AR, Gozalo-Marcilla M, Ringer SK, Schauvliege S, Fonseca MW, Esteves Trindade PH, Prospero Puoli Filho JN, Luna SPL. Development and validation of the facial scale (FaceSed) to evaluate sedation in horses. PLoS One 2021;16(6):e0251909.
    doi: 10.1371/journal.pone.0251909pubmed: 34061878google scholar: lookup
  7. Leigh H, Gozalo-Marcilla M, Esteve V, Gutiérrez Bautista ÁJ, Martin Gimenez T, Viscasillas J. Description of a novel ultrasound guided peribulbar block in horses: a cadaveric study. J Vet Sci 2021 Mar;22(2):e22.
    doi: 10.4142/jvs.2021.22.e22pubmed: 33774938google scholar: lookup
  8. de Oliveira AR, Gozalo-Marcilla M, Ringer SK, Schauvliege S, Fonseca MW, Trindade PHE, Puoli Filho JNP, Luna SPL. Development, Validation, and Reliability of a Sedation Scale in Horses (EquiSed). Front Vet Sci 2021;8:611729.
    doi: 10.3389/fvets.2021.611729pubmed: 33665216google scholar: lookup
  9. Kim A, Sasaki N, Lee I, Seo JP. Comparison of intraoperative cardiorespiratory and behavioral responses to medetomidine combined with tramadol or butorphanol during standing laparoscopic ovariectomy in horses. J Vet Med Sci 2021 Apr 9;83(4):643-647.
    doi: 10.1292/jvms.20-0397pubmed: 33583912google scholar: lookup
  10. Blohm KO, Tichy A, Nell B. Clinical utility, dose determination, and safety of ocular contrast-enhanced ultrasonography in horses: A pilot study. Vet Ophthalmol 2020 Mar;23(2):331-340.
    doi: 10.1111/vop.12730pubmed: 31799804google scholar: lookup
  11. Medina-Bautista F, Morgaz J, Quirós-Carmona S, Caravaca-Paredes ME, Navarrete-Calvo R, Medina ALS, Gómez-Villamandos R, Granados MDM. Effect of a Constant Rate Infusion of Ketamine on a Variable Rate Infusion of Xylazine in Standing Horses Undergoing Ventriculocordectomy and Laryngoplasty. Vet Sci 2026 Jan 12;13(1).
    doi: 10.3390/vetsci13010077pubmed: 41600733google scholar: lookup
  12. Thorn CA, Wilson DV, Wang S, Horne WA. Impact of sequential administration of detomidine, butorphanol, and midazolam on sedation, ataxia, stimulus response, and bispectral index in horses. Front Vet Sci 2025;12:1691137.
    doi: 10.3389/fvets.2025.1691137pubmed: 41200548google scholar: lookup
  13. Arantes JA, Rabelo IP, Bermudes L, Lacerenza MD, Mendes RP, Corrêa RR, Yamada DI, Valadão CAA, Dória RGS. Optimizing equine standing sedation: continuous infusion of detomidine and butorphanol enhances stability but prolongs ataxia. Front Vet Sci 2025;12:1606585.
    doi: 10.3389/fvets.2025.1606585pubmed: 40919037google scholar: lookup
  14. Giambrone G, Catone G, Marino G, Gugliandolo E, Miloro R, Vullo C. Loco-Regional Anaesthesia during Standing Laparoscopic Ovariectomy in Equids: A Systematic Review (2003-2023) of the Literature. Animals (Basel) 2024 Aug 8;14(16).
    doi: 10.3390/ani14162306pubmed: 39199841google scholar: lookup
  15. Izquierdo-Moreno J, de Paz MI, Manso-Díaz G, Villalba-Orero M, López-Sanromán J. Correlation between kinematic parameters, ataxia and ground-to-lip distance in detomidine sedated horses. Equine Vet J 2025 May;57(3):798-805.
    doi: 10.1111/evj.14207pubmed: 39140154google scholar: lookup
  16. Vullo C, Gugliandolo E, Biondi V, Biffarella M, Catone G, Tambella AM. Comparison of Detomidine or Romifidine in Combination with Morphine for Standing Magnetic Resonance Imaging in Horses. Vet Sci 2024 Mar 8;11(3).
    doi: 10.3390/vetsci11030124pubmed: 38535858google scholar: lookup
  17. Leps A, Korsos S, Clarysse M, Vlaminck L. Dental sectioning for intraoral equine cheek teeth extractions: 29 cases. Front Vet Sci 2024;11:1367861.
    doi: 10.3389/fvets.2024.1367861pubmed: 38425840google scholar: lookup
  18. Eichler F, Ehrle A, Machnik M, Jensen KC, Wagner S, Baudisch N, Bolk J, Pötzsch M, Thevis M, Bäumer W, Lischer C, Wiegard M. Behavioral observations, heart rate and cortisol monitoring in horses following multiple oral administrations of a cannabidiol containing paste (part 2/2). Front Vet Sci 2023;10:1305873.
    doi: 10.3389/fvets.2023.1305873pubmed: 38234983google scholar: lookup
  19. Eichler F, Ehrle A, Jensen KC, Baudisch N, Petersen H, Bäumer W, Lischer C, Wiegard M. Behavioral observations, heart rate and heart rate variability in horses following oral administration of a cannabidiol containing paste in three escalating doses (part 1/2). Front Vet Sci 2023;10:1305868.
    doi: 10.3389/fvets.2023.1305868pubmed: 38149295google scholar: lookup