Table 1

Consensus achieved for the block names. Strong consensus (≥75% agreement) was achieved for all block names except for rhomboid intercostal plane block, intertransverse process block, interpectoral plane block, and pectoserratus plane block, that had a weak consensus (50%–74% agreement)

RegionName (%)Anatomical description (%)
Abdominal wall1Rectus sheath block
(98%)
Injection in the plane between the rectus abdominis muscle and posterior rectus sheath
(98%)
2Ilioinguinal iliohypogastric nerves block
(91%)
Injection in proximity to the ilioinguinal and iliohypogastric nerves, located within the plane between the internal oblique and transversus abdominis muscles in the lower quadrants of the anterior abdominal wall
(93%)
3Transversus abdominis plane (TAP) block
(95%)
Injection in the plane between the internal oblique and transversus abdominis muscles
(95%)
4Midaxillary transversus abdominis plane block
(89%)
Injection in the plane between the internal oblique and transversus abdominis muscles at the midaxillary line
(81%)
5Subcostal transversus abdominis plane block
(91%)
Injection in the plane between the internal oblique and transversus abdominis muscles along the medial costal margin in the upper quadrants of the anterior abdominal wall
(80%)
6Anterior quadratus lumborum block (QLB)
(93%)
Injection in the plane between quadratus lumborum and psoas major muscles
(87%)
7Lateral quadratus lumborum block (QLB)
(89%)
Injection in the plane between the aponeuroses of internal oblique and transversus abdominis muscles at the lateral border of the quadratus lumborum muscle
(87%)
8Posterior quadratus lumborum block (QLB)
(96%)
Injection in the plane between the quadratus lumborum and erector spinae muscles, on the posterior surface of quadratus lumborum muscle
(87%)
9Transversalis fascia plane (TFP) block
(81%)
Injection in the plane between the transversus abdominis and the transversalis fascia
(75%)
10Rhomboid intercostal plane block
(69%)
Injection in the plane between the rhomboid major and intercostal muscles
(81%)
Paraspinal11Paravertebral block (PVB)
(96%)
Injection in the paravertebral space (between the superior costotransverse ligament and parietal pleura) in the thoracic region
(98%)
12Intertransverse process (ITP) block
(58%)
Injection in the tissue between two transverse processes, posterior to the superior costotransverse ligament or halfway between the posterior aspect of the transverse process and the pleura.
(86%)
13Erector spinae plane (ESP) block
(100%)
Injection in the plane between the erector spinae muscles and the transverse process
(98%)
14Retrolaminar block (RLB)
(89%)
Injection in the plane between the erector spinae muscles and the lamina
(91%)
Chest wall15Superficial serratus anterior plane (SAP) block
(80%)
Injection in the plane superficial to the serratus anterior muscles
(52%)
16Deep serratus anterior plane block (SAP)
(91%)
Injection in the plane between the posterior surface of the serratus anterior muscle and the periosteum of the rib
(76%)
17Superficial parasternal intercostal plane (PIP) block
(90%)
Injection in the plane superficial to the internal intercostal muscles and ribs and deep to the pectoralis major muscle
(83%)
18Deep parasternal intercostal plane (PIP) block
(85%)
Injection in the plane between the internal intercostal and the transversus thoracis muscles
(83%)
19Interpectoral plane (IPP) block
(73%)
Injection in the plane between the pectoralis major and pectoralis minor muscles
(94%)
20Pectoserratus plane (PSP) block
(53%)
Injection in the plane between the pectoralis minor and serratus anterior muscles
(76%)