Table 4.

Studies of SPG block for trigeminal neuralgia

Trigeminal neuralgia
Author	Year	Medical problems	Approach	Imaging	Medication	Number of cases	Study design	Outcome
Peterson et al. [12]	1995	Trigeminal neuralgia	Cotton tip applicator	None	4% lidocaine	2	Case series	Pain free
Manahan et al. [13]	1996	Trigeminal neuralgia	NA	None	Bupivacaine	1	Case report	Pain free
Kanai et al. [11]	2006	Second division trigeminal neuralgia	Nasal spray	None	Lidocaine	25	Randomized control	Significantly decreased pain with intranasal lidocaine spray
Candido et al. [14]	2013	Trigeminal neuralgia, chronic migraine headache, post-herpetic neuralgia	Tx360 Nasal applicator, transnasal	None	0.5% ropivacaine and 2 mg dexamethasone	3	Case series	Satisfactory