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1)
Intratesticular blocks
a)
This is a very effective, low-cost application of local anesthetic
agents
b)
Mix 1.0 mg/kg (0.5 mg/lb) bupivacaine with 1.0 mg/kg (0.5 mg/lb)
lidocaine and:
i)
Either 0.075 mg/kg (0.035 mg/lb) morphine or 0.003 mg/kg (0.0015
mg/lb) buprenorphine to effectively double the duration of analgesia1,2
c)
Use a 25g or 27g 5/8” needle for most cats and a 22g 1 to 1 ½“ needle
for dogs
d)
Place the needle through the testicle starting from the caudal pole
aiming for the spermatic cord
e)
It is OK, even desirable, for the needle to exit the testicle
proximally as it is the spermatic cord that will receive the direct clamp
stimulation
f)
ASPIRATE BEFORE INJECTING
i)
Inject, expecting firm backpressure, while withdrawing the needle
ii)
Expect to use about 1/3 to ½ of the drug volume per testicle
leaving the organ firmly turgid
g)
Repeat for other testicle
h)
The left over drug can/should be used to place a dermal incisional
block
i)
The total time for this procedure should be 1 to 2 minutes
j)
Drugs costs:
i)
3 kg cat = $0.04
ii)
55 kg dog = $0.65
k)
Videos
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| IT block in 16 kg canine |
Incisional block in 16 kg canine |
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| IT block in mature cat |
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| Click on the pictures to
play the video. Note aspiration before injection. |
| These are large files - be
patient. |
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