Nerve Block complications¶

Nerve Damage from NErve Block¶

M/C Chemical neuritis from overdose than required
- pain and varying degrees of nerve dysfunction, including paresthesia or motor or sensory deficit.
chemical irritation from the anesthetic,
direct trauma from the needle,
ischemia as a result of intraneural injection.

proper needle style, positioning, and manipulation.
keep needle parallel to longitutidal axis of Nerve
sharp pain / paresthesia needle close to nerve
25G best to reduce nerve damage
27G has limitied aspiration/break/bend
+Paresthesia
- on insertion withdraw 1-2mm and inject
- on injecting stop and withdraw
Nerve surrounderd by sheath and BV
- lidocaine in sheath/BV ⇒ compress nerve /nerve ischmia
intraneuronal injection Severe pain , Difficulty pressing plunger
- Reposition the needle
Proper positiong minimally ,painfull,good flow of anesthesia without resistance

Intra-Arterial
- Peripheral vasospam
- ischemia from Epinephrine
- Hematoma
  - Direct Pressure for 5-10min
Intra-vascular
- Not toxic
- only Blanching of Skin