A Comparative Study Between Regional Anesthesia in Thoracoscopes and the Conventional General Anesthesia (VATS)

A Comparative Study Between Regional Anesthesia in Thoracoscopes and the Conventional General Anesthesia

A Comparative Study Between Thoracic Epidural Anesthesia in Non-Intubated Video-Assisted Thoracoscopes and the Conventional General Anesthesia With One Lung Ventilation

Video-assisted thoracic surgery (VATS) is usually performed with general anesthesia and single lung ventilation. However, performing thoracic surgery under awake regional anesthesia has several potential advantages including avoidance of airway trauma and ventilator dependence associated with endotracheal intubation, besides promoting enhanced recovery after surgery and shorter mean hospital stay.

The aim of this study is to investigate the feasibility and the effect of Thoracic Epidural Anaesthesia for awake thoracic surgery to speed up recovery in patients as well as avoiding the complications accompanying General Anesthesia with one lung ventilation. Type of Study: Prospective randomized clinical study. Study Setting: This study will be conducted in Ain Shams University Hospitals.. Study Period: Expected for two years starting from 2019. Sampling Method: Randomized sampling by a computer generated random numbers table. Sample Size: 40 patients. Sample size was calculated using PASS 11 program for sample size calculation and according to the (Pompeo et al., 2004) study, the mean PaO2 perioperatively in the awake group = -3±1.5 mmHg and in the second group = -6.5±1.83 mmHg. Sample size of 40 cases per group (total 40) can detect this difference with power 100% and α-error 0.05.

Pleural Effusion, Malignant, Pleural Mesothelioma, Pleural Empyema, Pulmonary Diseases or Conditions, Pleural Neoplasms, Pulmonary Atelectasis, Pleural Diseases, Pericardial Effusion, Mediastinal Lymphadenopathy, Pneumothorax and Air Leak, Hemothorax, Pyopneumothorax

thoracocentesis,, pleural, biopsy, wash, effusion,, ventilation, thoracic epidural, non intubated VATS,, pericardiocenthesis

the study will include 40 participants, randomized into 2 equal groups, Group A: Awake participants will receive sole Thoracic Epidural Anesthesia. Group B: Participants receiving General Anesthesia with One Lung Ventilation.

Group A pre-medicated once using Midazolam 3-4mg intravenous (IV) and Fentanyl 50mcg, placed in the setting position. Using a winged 18G (Gadge), 9cm length Tuohy Epidural needle, a 20G springwound closed tip epidural catheter be inserted between T3-T4. A test dose (5ml) 2% Lidocaine given, followed by 5-8 ml Bupivacaine 0.5% and 50mcg Fentanyl as a loading dose. Further top-up dose of 5 ml Bupivicaine 0.5% after 45 minutes.

Group B premedicated once by 3-4mg Midazolam IV, Ranitidine 50mg, Metoclopramide 10mg and Dexamethasone 4mg. Preoxygenation with 100% O2. Induction of anesthesia with Propofol (2mg/kg) and Fentanyl (1mcg/kg). Tracheal intubation by 37-39 Fr Double Lumen Endotracheal Tube insertion facilitated with Cisatracurium 0.1mg/kg. and confirmation of its position by Fiberoptic Bronchoscopy. Selective Lung Ventilation strategy can be performed through the endobroncheal tube of the non operated lung once needed. Anesthesia maintained with Isoflurane (1-2%) and Cisatracurium (0.05mg/kg per dose). Later, anesthesia discontinued and extubation after full neuromuscular recovery after reversal of muscle relaxant by Neostigmine (0.05mg/kg) and Atropine (0.02mg/kg).

Ratio of arterial oxygen tension to fraction of inspired oxygen (PaO2/FiO2), arterial carbon dioxide tension (PaCO2). Hypoxemia is defined as peripheral oxygen saturation (SpO2) < 92% on room air with a need for oxygen supplementation.

The Visual Analogue Scale (VAS) consists of a 10 cm straight line with the endpoints defining extreme limits of "no pain at all" (0 cm) and "pain as bad as it could be" (10 cm). The patient is asked to mark his pain level on the line between the two endpoints. The distance between 0 and the mark then defines the subject pain score.

Inclusion Criteria: ASA less than or equal II. The procedure expected to be completed within 2 hours. Exclusion Criteria: Patients with expected difficult airway management. Hemodynamically unstable patients. Persistent cough or high airway secretions. Severe Emphysema or clinical signs of active infectious disease. Hypoxemia (PaO2 <60 mmHg) or hypercarbia (PCO2 >50 mmHg) Coagulopathy (INR >1.5). Obesity (BMI >30 Kg/m 2 ). Infection at the injection site, allergy to local anesthetics. Neurological disorders: seizures, intracranial mass or brain edema.

Chen KC, Cheng YJ, Hung MH, Tseng YD, Chen JS. Nonintubated thoracoscopic lung resection: a 3-year experience with 285 cases in a single institution. J Thorac Dis. 2012 Aug;4(4):347-51. doi: 10.3978/j.issn.2072-1439.2012.08.07.

Deng HY, Zhu ZJ, Wang YC, Wang WP, Ni PZ, Chen LQ. Non-intubated video-assisted thoracoscopic surgery under loco-regional anaesthesia for thoracic surgery: a meta-analysis. Interact Cardiovasc Thorac Surg. 2016 Jul;23(1):31-40. doi: 10.1093/icvts/ivw055. Epub 2016 Mar 16.

Pompeo E, Mineo D, Rogliani P, Sabato AF, Mineo TC. Feasibility and results of awake thoracoscopic resection of solitary pulmonary nodules. Ann Thorac Surg. 2004 Nov;78(5):1761-8. doi: 10.1016/j.athoracsur.2004.05.083.

Pompeo E, Sorge R, Akopov A, Congregado M, Grodzki T; ESTS Non-intubated Thoracic Surgery Working Group. Non-intubated thoracic surgery-A survey from the European Society of Thoracic Surgeons. Ann Transl Med. 2015 Mar;3(3):37. doi: 10.3978/j.issn.2305-5839.2015.01.34.

May awake video-assisted thoracoscopic surgery with thoracic epidural anesthesia use routinely for minimaly invasive thoracic surgery procedures in the future?