The Effect and Safety of the Four Points Transversus Abdominis Plane Block
Status:
Completed
Trial end date:
2020-07-30
Target enrollment:
Participant gender:
Summary
The anterior abdominal wall from below the xiphoid to infraumbilical area is dominated by the
sensory nerves which originate from the anterior rami of the thoracolumbar spinal nerves from
T6-L1. The branches nerves from T7-T12 are between aponeurosis internal oblique and
transversus abdominal muscle. They can be approached with the ultrasound guidance at
subcostal and lateral abdominal wall position.
The bilateral transversus abdominis plane (TAP) block has been demonstrated effectiveness and
safety in postoperative analgesia to the under abdominal surgery. However, the effect of one
to the upper abdominal surgery is unclear.
The four points TAP block has been described the first in 2010. The effect of the four points
TAP block in postoperative analgesia to the upper abdominal surgery has been reported in
recent years. Besides, the effect of thoracic paravertebral block (PVB) in postoperative
analgesia to liver resection was also reported. The both techniques have been performing in
some studies. The effect and safety of the both techniques have been reported. However, the
evidence level is still weak. The investigators need to find a technique, which has
effectiveness as well as safety to replace the epidural analgesia, which was confirmed that
had many complications, in postoperative analgesia to the hepatectomy.
The investigators hypothesized that the four points TAP block under the ultrasound guidance
has more effectiveness than the thoracic paravertebral block in postoperative analgesia to
the hepatectomy.