Comparison of Low-Dose Versus Standard-Dose Hyperbaric Bupivacaine in Spinal Anesthesia
Comparison of Low-Dose Versus Standard-Dose Hyperbaric Bupivacaine in Spinal Anesthesia: Hemodynamic Stability and Recovery Profile in Elderly Patients Undergoing Lower Limb Orthopedic Surgery
The goal of this randomized controlled trial is to determine whether low-dose hyperbaric bupivacaine provides better hemodynamic stability and postoperative recovery compared with standard-dose hyperbaric bupivacaine in elderly patients undergoing lower limb orthopedic surgery under spinal anesthesia.
The main questions it aims to answer are:
- Does low-dose hyperbaric bupivacaine reduce the incidence of intraoperative hypotension and bradycardia compared with standard-dose hyperbaric bupivacaine?
- Does low-dose hyperbaric bupivacaine improve postoperative recovery profile compared with standard-dose hyperbaric bupivacaine?
Researchers will compare elderly patients receiving low-dose hyperbaric bupivacaine with those receiving standard-dose hyperbaric bupivacaine to determine whether a lower intrathecal dose improves cardiovascular stability and recovery without compromising the effectiveness of spinal anesthesia.
Participants will:
- Provide written informed consent before enrollment.
- Undergo elective lower limb orthopedic surgery under spinal anesthesia.
- Be randomly assigned to receive either low-dose or standard-dose hyperbaric bupivacaine.
- Have their blood pressure, heart rate, and other vital signs monitored throughout the surgical procedure.
- Be assessed for intraoperative hypotension and bradycardia according to predefined study criteria.
- Be evaluated for postoperative recovery parameters, including motor recovery and readiness for postoperative recovery and mobilization.
The information obtained from this study may help identify a safer and more effective spinal anesthetic technique for elderly patients undergoing orthopedic surgery.
調査の概要
状態
研究の種類
入学 (推定)
段階
- フェーズ 4
連絡先と場所
研究連絡先
- 名前:Muhammad Shaheryar Bashir, MBBS, BSc, FCPS (R) CHPE, DPHN
- 電話番号:+92-335-4377900
- メール:drmsb259@gmail.com
研究場所
-
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Punjab Province
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Lahore、Punjab Province、パキスタン、54950
- Mayo Hospital, Lahore
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参加基準
適格基準
就学可能な年齢
- 高齢者
健康ボランティアの受け入れ
説明
Inclusion Criteria:
- Male or female patients aged 65 years and above.
- Patients scheduled for elective lower limb orthopedic surgery under spinal anesthesia.
- American Society of Anesthesiologists (ASA) physical status I-III.
- Patients willing to participate and provide written informed consent.
Exclusion Criteria:
- Refusal to participate in the study.
- Contraindications to spinal anesthesia (e.g., infection at puncture site, coagulopathy, severe hypovolemia, raised intracranial pressure).
- Known hypersensitivity or allergy to bupivacaine.
- Severe valvular heart disease.
- Significant cardiac arrhythmias.
- Uncontrolled hypertension.
- Severe hepatic or renal impairment.
- Pre-existing neurological disorders affecting lower limb motor or sensory function.
- Severe spinal deformity or previous lumbar spine surgery interfering with spinal anesthesia.
- Cognitive impairment or inability to provide informed consent.
- Emergency orthopedic procedures.
研究計画
研究はどのように設計されていますか?
デザインの詳細
- 主な目的:処理
- 割り当て:ランダム化
- 介入モデル:並列代入
- マスキング:ダブル
武器と介入
参加者グループ / アーム |
介入・治療 |
|---|---|
|
実験的:Low-Dose Hyperbaric Bupivacaine
Participants randomized to this group will receive low-dose hyperbaric bupivacaine for spinal anesthesia before elective lower limb orthopedic surgery.
Hemodynamic parameters and postoperative recovery outcomes will be assessed according to the study protocol.
|
Low-dose hyperbaric bupivacaine administered intrathecally for spinal anesthesia in elderly patients undergoing elective lower limb orthopedic surgery.
|
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アクティブコンパレータ:Standard-Dose Hyperbaric Bupivacaine
Participants randomized to this group will receive standard-dose hyperbaric bupivacaine for spinal anesthesia before elective lower limb orthopedic surgery.
Hemodynamic parameters and postoperative recovery outcomes will be assessed according to the study protocol.
|
Standard-dose hyperbaric bupivacaine administered intrathecally for spinal anesthesia in elderly patients undergoing elective lower limb orthopedic surgery.
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この研究は何を測定していますか?
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
|
Incidence of Intraoperative Hypotension
時間枠:From administration of spinal anesthesia until completion of surgery
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Occurrence of intraoperative hypotension following spinal anesthesia, defined as a decrease in systolic blood pressure greater than 20% from baseline or systolic blood pressure less than 90 mmHg requiring intervention.
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From administration of spinal anesthesia until completion of surgery
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二次結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
|
Incidence of Intraoperative Bradycardia
時間枠:From administration of spinal anesthesia until completion of surgery.
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Occurrence of intraoperative bradycardia, defined as heart rate less than 50 beats per minute requiring pharmacological treatment.
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From administration of spinal anesthesia until completion of surgery.
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Time to Complete Motor Recovery
時間枠:From completion of surgery until achievement of Bromage Score 0, assessed up to 24 hours postoperatively
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Time required to achieve complete motor recovery following spinal anesthesia, assessed using Bromage Score 0.
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From completion of surgery until achievement of Bromage Score 0, assessed up to 24 hours postoperatively
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Time to First Ambulation
時間枠:Within the first 24 hours after surgery
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Time from completion of surgery to the patient's first assisted ambulation.
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Within the first 24 hours after surgery
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Postoperative Recovery Profile
時間枠:From completion of surgery until discharge from the post-anesthesia care unit (PACU), assessed up to 24 hours postoperatively
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Assessment of recovery following spinal anesthesia, including readiness for discharge from the post-anesthesia care unit and return of motor function.
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From completion of surgery until discharge from the post-anesthesia care unit (PACU), assessed up to 24 hours postoperatively
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協力者と研究者
スポンサー
出版物と役立つリンク
一般刊行物
- Lee YY, Ngan Kee WD, Muchhal K, Chan CK. Clinical comparison of 12 mg ropivacaine and 8 mg bupivacaine (with fentanyl) in spinal anaesthesia for major orthopaedic surgery in geriatric patients. Acta Anaesthesiol Scand. 2011;55(3):298-303
- Ben-David B, Frankel R, Arzumonov T, Marchevsky Y, Volpin G. Minidose bupivacaine-fentanyl spinal anesthesia for surgical repair of hip fracture in the aged. Anesthesiology. 2000 Jan;92(1):6-10. doi: 10.1097/00000542-200001000-00007.
- Patel A, Yadav AK, Patel PS, Kumari R, Deepesh. Comparative hemodynamic stability in low-dose versus conventional-dose bupivacaine for spinal anaesthesia in elderly patients. Int J Pharm Res Technol. 2025;15(2). doi:10.31838/ijprt/15.2.89.
研究記録日
主要日程の研究
研究開始 (推定)
一次修了 (推定)
研究の完了 (推定)
試験登録日
最初に提出
QC基準を満たした最初の提出物
最初の投稿 (実際)
学習記録の更新
投稿された最後の更新 (実際)
QC基準を満たした最後の更新が送信されました
最終確認日
詳しくは
本研究に関する用語
キーワード
その他の研究ID番号
- Mayo_ANS_01
個々の参加者データ (IPD) の計画
個々の参加者データ (IPD) を共有する予定はありますか?
IPD プランの説明
医薬品およびデバイス情報、研究文書
米国FDA規制医薬品の研究
米国FDA規制機器製品の研究
米国で製造され、米国から輸出された製品。
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