Table 4.

Review of literature comparing previous studies using USG guidance for FV DC insertion

Author	Nature of Study	Sample Size (ALT/USG)	Results (ALT/USG)
Farrell (16)	Retrospective	16/14	Successful cannulation: 100%/100%
			Successful first attempt: 56.3%/85.7%
			Number of attempts: 1.5 ± 0.6/1.1 ± 0.4
			Femoral arterial puncture: 6.3%/0%
Kwon (15)	Prospective with historical controls	38/28	Success rate: 89.5%/100%
			Successful first attempt: 55.3%/92.9%
			Femoral arterial puncture: 15.8%/7.1%
			Hematoma: 2.6%/0%
			Success rate: 87%/100%
Zollo (4)	Retrospective	230/38	Femoral arterial puncture: 11.2%/2.6%
			Hematoma: 3.9%/0%
			Success rate: 80%/98.2%
This study	Prospective randomized controlled trial	55/55	Successful first attempt: 54.5%/85.5%
			Number of attempts: 1.5 ± 0.6/1.2 ± 0.4
			Femoral arterial puncture: 10.9%/1.8%
			Hematoma: 7.2%/3.6%