Ropivacaine Phrenic Nerve Block for Post-Hysterectomy Pain

Okay, here’s a breakdown of the key information from the provided text, categorized for clarity.This summarizes the study’s methodology:

1. Study Design & Participants:

* Focus: Investigates something related to Post-Laproscopic Surgical Pain (PLSP) – though the specific interventions are not detailed in this excerpt.
* Groups: Six patient groups (details of these groups are not provided in this excerpt).
* follow-up: Patients were followed at 0.5h, 6h, 24h, 48h, and 72 hours postoperatively.
* Repeated Measures: Each patient underwent all five time point assessments.

2. Anesthesia & Surgical Procedure:

* Anesthetic Agents:

* Induction: Fentanyl (1 µg/kg), propofol, and rocuronium.
* Maintenance: Propofol (4-5 mg/kg/h), remifentanil (0.1-0.2 µg/kg/min), dexamethasone (0.06 mg/kg/h).
* Reversal: Flumazenil, atropine, and neostigmine.
* Pre-operative Analgesia: Flurbiprofen axetil (50mg)
* Ventilation: Mechanical ventilation initiated post-intubation with specific settings (tidal volume, rate, I:E ratio, FiO2).
* Hemodynamics: Systolic blood pressure and heart rate were maintained within 20% of baseline.
* Fluids: Crystalloid and colloid fluids were administered.
* Surgery: Laparoscopic surgery (implied).pneumoperitoneum duration was recorded.

3. Outcome Measures:

* Primary Outcome: Incidence and severity of Post-Laproscopic Surgical Pain (PLSP) – assessed using VAS or NRS.
* Pain Measurement: Visual Analog Scale (VAS).
* Secondary Outcomes:

* Respiratory Rate (RR) – abnormal if > 20 breaths/min.
* Peripheral Oxygen Saturation (SpO₂) – abnormal if < 94%.
* Extubation time.
* Rescue analgesia rate (tramadol 30mg when VAS ≥ 4).
* Incidence of Postoperative Nausea and Vomiting (PONV).
* Episodes of persistent dyspnea or oxygen therapy requirement.

4.Baseline & Intraoperative data Collected:

* Baseline: Age, BMI, ASA classification.
* Intraoperative: Pneumoperitoneum duration, sufentanil dosage, propofol dosage.

5. Statistical Analysis:

* Sample Size: Estimated using GPower 3.1.
* method: Mixed-model Analysis of Variance (ANOVA) – 6-group x 5-time-point repeated measures.
* Factors: Intervention timing, group allocation, and their interaction.
* Assumptions: Correlation between repeated measures, sphericity (tested with Mauchly’s test, corrected with Greenhouse-Geisser if violated).
* Importance Level: Two-tailed, *P < 0.05.

Let me know if you’d like me to elaborate on any specific aspect of this information.