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Pet identification
VMD launches adverse events monitoring scheme for microchips

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THE Veterinary Medicines Directorate (VMD) has launched a monitoring scheme under which adverse events relating to microchips can be reported.

For the purposes of the scheme, suspected adverse events have been divided into three categories:

  • Implantation reactions. These tend to occur soon after implantation and cover reactions that are usually due to implantation procedures, such as haematomas or infection. An inflammatory response due to the animal rejecting the microchip would also be recorded in this category. The VMD says that current data suggest these are uncommon reactions.

  • Microchip migration. Most microchips are coated to promote tissue bonding; however, if they have been incorrectly implanted there are occasions when a microchip may move. This movement should cause no problem for the animal but it does mean that it is more difficult to identify the animal if the microchip cannot be located. Most scanners need to be within a few centimetres of the microchip for the reading to be picked up.

  • Microchip failure. Palpation, x ray or ultrasound should be used to confirm the position of the microchip before failure is reported. …

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