Patients undergoing breast surgery (unilateral total mastectomy) due to anticipated breast cancer
Conditions
Interventions
Ultrasound-guided PVB with 15 mL of 0.75% ropivacaine near the 4th-5th thoracic spine on the operative side (low volume group).
Ultrasound-guided PVB with 30 mL of 0.375% ropivacaine near the 4th-5th
Sponsors
Aidu Chuo Hospital
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: Patients undergoing breast surgery (unilateral total mastectomy and/or axillary lymph node dissection) under general anesthesia at Aidu Chuo Hospital after December 2023 who meet all three of the following criteria. 1) 18 years of age or older 2) Scheduled to undergo general anesthesia, and an American Society of Anesthesiologists physical status classification of 1-3 3) Written consent for participation in the study has been obtained from the patient or the patient's family.
Exclusion criteria
Exclusion criteria: One of the following applies: (1) Bilateral surgery is planned (2) Weight less than 40 kg or BMI more than 30 kg/m2 (3) History of spontaneous pneumothorax (4) General contraindications to PVB (e.g., continued use of anticoagulants or antiplatelet agents) (5) Inability to report the extent of effect immediately after surgery due to delayed awakening, etc (6) Cases in which PVB was attempted but the drug was administered in a shallow layer, resulting in MTPB or ESPB (7) Patient has difficulty in communication due to cognitive decline, hearing loss, etc. (8) Patients with decreased sensation (e.g., after cerebral infarction) (9) Other patients who are judged to be incompatible by the anesthesiologist (e.g., patients with severe obstructive lung disease that could be fatal if pneumothorax occurs).
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Sensory block area and sensory decline area of the skin of the chest wall on both sides | — |
Secondary
| Measure | Time frame |
|---|---|
| Sensory block area and decline area of bilateral chest wall skin between low and high volume groups | — |
Countries
Japan
Contacts
Public ContactKeisuke Yoshida
Fukushima Medical University Department of Anesthesiology
Outcome results
None listed