Mechanical nociceptive thresholds of dorsal laminae in horses after local anaesthesia of the palmar digital nerves or dorsal branches of the digital nerve

Paz, Cahuê Francisco Rosa; Magalhães, Jéssica Fontana de; Mendes, Heloisa Maria Falcão; Rocha, Sérgio Schwarz da; Belknap, James K.; Alves, G.E.S.; Faleiros, Rafael Resende

doi:10.1016/j.tvjl.2016.05.005

Cited by 18 publications

(34 citation statements)

References 15 publications

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“…These branches are related to mechanical nociception of the proximal aspect of the foot, specifically the coronary band (Paz et al . ). Therefore, the injection of the 2% AC more proximally, at the base of sesamoid bones, may result in better LI rates in cases involving the DIPJ.…”

Section: Discussionmentioning

confidence: 97%

Management of chronic foot lameness with 2% ammonium chloride on the palmar digital nerves

Dau

Azevedo

Côrte

et al. 2018

Equine Veterinary Education

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This case series describes the analgesic effect of 2% ammonium chloride (2% AC) in horses with chronic foot pain. Ten horses with foot pain related to chronic laminitis (n = 1), bruised sole (n = 1), distal interphalangeal joint (DIPJ; n = 1), podotrochlear apparatus (PA; n = 4) and PA associated with DIPJ (PA + DIPJ; n = 3) received perineural injections with 3 mL of 2% AC on the palmar digital nerves. A Five horses with pain related to PA + DIPJ (n = 3), PA (n = 1) and DIPJ (n = 1) were treated with saline as control. The analgesic effect was evaluated as lameness improvement (LI) rate (%) using a body-mounted inertial sensor system, and was assessed at 5, 12, 19, 35, 47 and 62 days after treatment. Horses treated with 2% AC demonstrated a mean LI rate above 50% from Day 12 (63% AE 26) to Day 62 (65% AE 26). Control horses has a overall LI of 28% (AE 23%) and a LI above 50% was evidenced in horses with PA + DIPJ (n = 2) and PA pain (n = 1) at different times. Horses with PA pain presented higher LI rates (72% AE 23) than that presented by horses with PA + DIPJ (51% AE 9) or DIPJ (51% AE 19). Horses with severe radiographic lesions of the navicular bone and DIPJ had the lowest LI rates after treatment. The 2% AC is a useful treatment to be included in the clinical management of chronic foot pain involving the podotrochlear apparatus with mild radiographic lesions. Lameness examLameness evaluation was performed with a body-mounted inertial sensor system 2 . Horses were trotted by hand in a straight line on a hard surface (asphalt/concrete/compacted

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Section: Discussionmentioning

confidence: 97%

Management of chronic foot lameness with 2% ammonium chloride on the palmar digital nerves

Dau

Azevedo

Côrte

et al. 2018

Equine Veterinary Education

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“…The equine foot is innervated by the medial and lateral digital nerves and dorsal branches of the palmar/plantar nerves (Sack 1975). A recent study has confirmed that the palmar digital nerves innervate the lamellar corium in the forelimb, whereas the dorsal branches of the palmar digital nerves innervate the coronary band (Paz et al 2016). Nociceptors are specialised sensory neurons in tissues which are activated specifically by noxious (mechanical, chemical or thermal) stimuli.…”

Section: Sensory Innervation Of the Footmentioning

confidence: 99%

Pain management for laminitis in the horse

Hopster

Eps

2018

Equine Veterinary Education

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Summary The inability to control pain is the most common reason for cessation of treatment and euthanasia in cases of laminitis, yet pain also serves a unique protective function in these cases, particularly in the acute phase when lamellar integrity is weakened. Successful analgesia requires an understanding of the disease pathophysiology, the sources of pain in laminitis, methods of serial pain evaluation, and methods of analgesia including systemic and regional techniques. This review discusses the approach to analgesia including detail of traditional and novel analgesic medications and techniques with specific reference to the laminitis case.

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“…Manuscript to be reviewed was used for testing of the coronary band and heel bulbs, whereas a cone tip was used to evaluate the dorsal lamellae and sole regions (Paz et al, 2016).…”

Section: Algometrymentioning

confidence: 99%

Peer Review #1 of "Mechanical nociceptive assessment of the equine hoof following distal interphalangeal joint intra-articular anesthesia (v0.2)"

Haussler¹

2020

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Background: With the hypothesis that equine dorsal lamellar tissue can be desensitized by anesthesia injection into distal interphalangeal joint (DIPJ), the objective was to assess the mechanical nociceptive threshold of hoof dorsal lamellae following intra-articular (IA) administration of lidocaine into this joint. Methods: The DIPJ of the forelimbs of six adult healthy horses were injected with either 5 mL of lidocaine, or 5 mL of lactated ringers solution. Treatments were randomly distributed, with each forelimb undergoing a single treatment. The hooves were evaluated pre-and post-injection at pre-selected times over 4 hours, using a pressure algometry model. Mechanical nociceptive thresholds (MNTs) were recorded for the sole (dorsal, palmarolateral, and palmaromedial regions), coronary band (medial, lateral, and dorsal regions), heel bulbs (medial and lateral), and dorsal lamellar region (2 cm and 4 cm distal to the coronary band). The MNT means were compared over time using the Friedman test and between treatments using the Wilcoxon signed-rank test, with values of P<0.05 considered statistically significant. Results: There were no differences between treatments for any region of the hoof during the evaluation period. However, MNT values indicating analgesia were recorded in the dorsal lamellar region in 50% of hooves following adminstration of lidocaine into the DIPJ. Conclusion: The administration of 5 mL of lidocaine into the DIPJ does not significantly increase the mechanical nociceptive threshold of the equine hoof.

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Mechanical nociceptive thresholds of dorsal laminae in horses after local anaesthesia of the palmar digital nerves or dorsal branches of the digital nerve

Cited by 18 publications

References 15 publications

Management of chronic foot lameness with 2% ammonium chloride on the palmar digital nerves

Management of chronic foot lameness with 2% ammonium chloride on the palmar digital nerves

Pain management for laminitis in the horse

Peer Review #1 of "Mechanical nociceptive assessment of the equine hoof following distal interphalangeal joint intra-articular anesthesia (v0.2)"

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