Study: NCT04669639

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Block procedures for shoulder surgery analgesia
Description: The patients in group (a) will be placed in lateral decubitus. Then, an ultrasound-guided aseptic technique with a high-frequency linear transducer will be used to locate the transverse process of T2, where a needle will be inserted in a cephalocaudal direction until reaching the space between the fascia of the erector spinae and the transverse process of T2 and 30 ml of local anesthetic of bupivacaine 0.5% will be injected.~* In group (b), SSC nerve block will be done as follow: In the suprascapular notch, an ultrasound-guided aseptic technique with a high-frequency linear transducer will be used. The linear probe, enveloped in a sterile sheath, will be placed parallel to the spine of the scapula to visualize it and then will be moved cephalic to the supraspinatus fossa. The probe will then be moved laterally up to the scapular notch, where the nerve will be identified by its round hyperechogenic shape 4 cm deep.~* control group: patients will receive only general anesthesia

Intervention type: OTHER
Group type: EXPERIMENTAL
Intervention: Block procedures for shoulder surgery analgesia
Description: The patients in group (a) will be placed in lateral decubitus. Then, an ultrasound-guided aseptic technique with a high-frequency linear transducer will be used to locate the transverse process of T2, where a needle will be inserted in a cephalocaudal direction until reaching the space between the fascia of the erector spinae and the transverse process of T2 and 30 ml of local anesthetic of bupivacaine 0.5% will be injected.~* In group (b), SSC nerve block will be done as follow: In the suprascapular notch, an ultrasound-guided aseptic technique with a high-frequency linear transducer will be used. The linear probe, enveloped in a sterile sheath, will be placed parallel to the spine of the scapula to visualize it and then will be moved cephalic to the supraspinatus fossa. The probe will then be moved laterally up to the scapular notch, where the nerve will be identified by its round hyperechogenic shape 4 cm deep.~* control group: patients will receive only general anesthesia

Intervention type: OTHER
Group type: PLACEBO_COMPARATOR
Intervention: Block procedures for shoulder surgery analgesia
Description: The patients in group (a) will be placed in lateral decubitus. Then, an ultrasound-guided aseptic technique with a high-frequency linear transducer will be used to locate the transverse process of T2, where a needle will be inserted in a cephalocaudal direction until reaching the space between the fascia of the erector spinae and the transverse process of T2 and 30 ml of local anesthetic of bupivacaine 0.5% will be injected.~* In group (b), SSC nerve block will be done as follow: In the suprascapular notch, an ultrasound-guided aseptic technique with a high-frequency linear transducer will be used. The linear probe, enveloped in a sterile sheath, will be placed parallel to the spine of the scapula to visualize it and then will be moved cephalic to the supraspinatus fossa. The probe will then be moved laterally up to the scapular notch, where the nerve will be identified by its round hyperechogenic shape 4 cm deep.~* control group: patients will receive only general anesthesia