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  Indian J Med Microbiol
 

Figure 1: Transverse section through the lateral aspect of the abdominal wall at the triangle of Petit. With placement of the needle, a double pop or loss of resistance is felt as the external oblique (EO) muscle/fascia and the internal oblique (IO) muscle/fascia are penetrated. The local anesthetic solution is injected in the plane between the EO and the transversus abdominis (TA) muscles. LS = lumbar spine, LD = latissimus dorsi, PM = psoas major, QL = quadratus lumborum, MM = multifidus muscle, IL = longissimus iliocostalis.

Figure 1: Transverse section through the lateral aspect of the abdominal wall at the triangle of Petit. With placement of the needle, a double pop or loss of resistance is felt as the external oblique (EO) muscle/fascia and the internal oblique (IO) muscle/fascia are penetrated. The local anesthetic solution is injected in the plane between the EO and the transversus abdominis (TA) muscles. LS = lumbar spine, LD = latissimus dorsi, PM = psoas major, QL = quadratus lumborum, MM = multifidus muscle, IL = longissimus iliocostalis.