A New Way To Administer Sedation To Mares

Sedating horses for routine procedures is sometimes necessary. While these drugs are typically administered through intravenous or intra-muscular injection, a new oral gel containing detomidine can be absorbed through the mucous membrane; the ease of administration has made the drug popular among horse owners and caretakers.

The gel is applied under the tongue and absorbed; gel that is swallowed is less effective as it may be broken down during digestion and metabolized before it can induce sedation. Drs. Reza Seddighi, Heather Knych, Sherry Cox, Xiaocun Sun, Kaitlin Moorhead, Thomas Doherty evaluated using the gel intravaginally to determined if it was useful as a sedative when delivered in this manner.

Six adult mares were used in the study. Each mare was studied twice, a week apart. On each occasion, the mare received detomidine intravenously or by applying the gel intravaginally. The team monitored the effects of the drug, including heart rate, ataxia, distance of muzzle to the floor and degree of sedation.

The team determined that the sedation lasted longer and was deeper when the detomidine was given intravaginally; they consider this a viable delivery method in mares. Additional research needs to be done to determine if a mare's heat cycle would affect absorption of the drug.

Read the full study here.

Read more at Equine Science Update.

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Research Into Training Programs Needed To Protect Equine Tendons

The superficial digital flexor tendons in a horse's front legs are responsible for much of the animal's athleticism: They store energy and play a critical role in the efficiency of the horse's trot and gallop. However, these tendons are especially susceptible to injury: They are one of the most common causes of lameness in performance horses. Tendon injuries are slow and difficult to heal, so it's imperative that they be detected early and that training methods be adapted to allow time for the tissues to heal.

Drs. Claire O'Brien, Neil Marr and Chavaunne Thorpe investigated the biomechanical and biothermal effects of strain on this tendon and how both forces contributed to microdamage. Though the tendon is essential for efficient performance and locomotion, it has a very narrow window for error, which makes it susceptible to injury.

The trio reviewed 140 scientific papers and discovered that most superficial digital flexor tendon injuries occur during fitness work. Risks to tendons include variations in training intensity and frequency, surfaces and equipment. Individual risk factors include breed, age and sex; variations in tendon blood supply, strength and flexibility may contribute to chronic tendon injuries and longer recover rates.

The team suggest that research be done in several areas so that recommendations based on scientific principles can be made for training programs; these would minimize the risk of tendon injury. They also suggest that those involved in a horse' training understand the following:

  • The physiologic demands high-intensity training places on equine tendons
  • Heavy training sessions that mimic competition should be closely monitored and only repeated every 72 hours to allow tendons enough time to repair and adapt. Factors such as the horse's age, history of injury and previous competition experience should help guide decision making on the frequency of training sessions
  • The effects of other factors like surface type, fence height, bandaging and ambient temperature place on tendon temperature and strain
  • Training should be increased incrementally over time, using objective measures to gauge each horse's physiologic response

Read the full article here.

Read more at HorseTalk.

The post Research Into Training Programs Needed To Protect Equine Tendons appeared first on Horse Racing News | Paulick Report.

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Parx Cancels Monday Racing Due To Heat Advisory

Parx Racing cancelled its 10-race card on Monday, July 20 due to extreme heat in the area, according to a post on the track's Twitter account.

The National Weather Service issued an excessive heat warning for Bensalem, Pa., which will be in effect until 8 p.m. on Monday.  Temperatures are expected to rise to 96 degrees Fahrenheit.

Racing resumes Tuesday.

The post Parx Cancels Monday Racing Due To Heat Advisory appeared first on Horse Racing News | Paulick Report.

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