What is a likely consequence of depositing LA too rapidly?

What is a likely consequence of depositing LA too rapidly?

• A. Pain during injection
• B. Faster onset with no pain
• C. No effect on comfort
• D. Less diffusion

Answer: (A)

Depositing local anesthetic too quickly increases tissue pressure and mechanical irritation at the injection site, which stimulates pain receptors and leads to pain during the injection. A slow, controlled deposition allows the solution to spread around the nerve fibers more gradually, reducing tissue distention and the likelihood of discomfort while still achieving effective anesthesia. The other ideas don’t fit because rapid deposition does not reliably speed onset with no pain, it does affect comfort (it tends to worsen it), and it doesn’t inherently cause less diffusion.

Depositing local anesthetic too quickly increases tissue pressure and mechanical irritation at the injection site, which stimulates pain receptors and leads to pain during the injection. A slow, controlled deposition allows the solution to spread around the nerve fibers more gradually, reducing tissue distention and the likelihood of discomfort while still achieving effective anesthesia. The other ideas don’t fit because rapid deposition does not reliably speed onset with no pain, it does affect comfort (it tends to worsen it), and it doesn’t inherently cause less diffusion.