This study aimed to determine the accuracy of the V technique in predicting the location of the femoral vein compared to the technique of palpating the femoral artery with the use of USGss as a standard in determining the exact location of the femoral vein.

One hundred and fifteen subjects were allocated into two large groups, V tecnique group and palpation tecnique group. Researchers will perform the V technique on the patient's inguinal area. This technique was performed using the researcher's contralateral hand. After the V technique is performed, the next researcher will perform the technique of palpating the femoral artery pulse at the exact location as the V technique. This technique is done by palpating the femoral artery pulsation using the examiner's index and middle fingers along the inguinal ligament; the location of the femoral vein is at 1 cm. medial to the femoral artery 2 cm inferior to the inguinal ligament. This location is marked "y" with a UV marker. researchers will compare the accuracy of both techniques in determining the exact location of femoral veins.

Inclusion Criteria:

• patients aged 18-65 years
• body mass index (BMI) of 18-25 kg/m2

Exclusion Criteria:

• could not lie supine
• had congenital or acquired abnormalities in the pelvic and inguinal region
• had a history of previous femoral vein puncture
• allergic to USG gel