Perioperative management - Anterolateral thoracotomy

  1. Indications

    Thoracotomy is defined as the surgical opening of the chest through an intercostal incision. This gains access to the osseous chest wall, pleural space, lung, diaphragm, and mediastinum.

    This presentation illustrates the procedure of anterolateral thoracotomy, which is particularly relevant for the GI surgeon as it represents the standard open approach to the intrathoracic esophagus.

    The main benefit in anterolateral thoracotomy is that this procedure is gentler than the posterolateral approach. Less muscles must be divided, the latissimus dorsi in particular remains largely intact, and the ribs also do not have to be spread as much.

  2. Contraindications

    • Liver cirrhosis Child C
    • Severe interstitial lung disease (COPD, pulmonary fibrosis)
    • Severe heart failure

    Severe coronary artery disease

  3. Preoperative diagnostic work-up

    • Chest-CT
    • Cardiovascular, and possibly also lung function testing
    • Blood group, blood count, liver, and renal panel
    • Further diagnostic work-up depending on the clinical picture present
  4. Special preparation

    If necessary, perioperative prophylactic antibiotic regimen (depending on the planned operation)

    Optimization of the pulmonary situation ( breathing exercises, if necessary, inhalation treatment)

  5. Informed consent

    • General surgical risks such as infections and complications during anesthesia
    • Lung injury
    • Injury to intercostal nerves and vessels
    • Rib fractures
    • Fistula formation
    • Cardiac arrhythmias
    • Secondary bleeding
    • Rethoracotomy
    • Atelectasis
    • Heart failure
    • Pneumonia
    • Respiratory failure
    • Subcutaneous emphysema
    • Pleural effusion/empyema
  6. Anesthesia

    • General anesthesia  (double-lumen endotracheal tube—DLT)
    • Epidural catheter 
    • Intercostal block: Mark the inferior aspects of the ribs to be blocked lateral to the lateral aspect of the sacrospinal muscle group or correspondingly the posterior rib articulations superior to T7 and then determine the injection sites
  7. Positioning

    • Full lateral decubitus position on a vacuum mattress
    • Alternatively, lateral decubitus position with supports against the buttocks and the anterior chest wall.
    • In dual-cavity procedures a lateral decubitus position tilted 35° posteriad with soft rolls/bean bags supporting the back may be helpful
    • Ipsilateral arm elevated on an armboard and extended anterocraniad.
    • Dependent arm extended
    • Position the dependent costal arch over the joint between back plate and leg plate of the operating table and then flex the extended leg plate down by 20°-30°. This mildly hyperextends the chest, thereby opening up the intercostal spaces.
    • Dependent leg extended, and the superior leg slightly flexed at the hip and knee. Pillows inserted between the legs.
    • Strictly avoid any hyperextension and marked flexion. The head and neck must be in line with the spine and not flexed downward.
    • Pay particular attention to position-related injuries to the ulnar and peroneal nerves.
  8. Operating room setup

    Surgeon and scrub nurse stand facing the chest, with the assistant across the table.

  9. Special instruments and fixation systems

    • Two rib retractors
    • Brunner retractor
    • Electrocautery
    • 2 silicone drains
    • Anchoring suture
    • Water lock / Medela digital chest tube system
  10. Postoperative management

    Postoperative analgesia:

    Thoracotomy is a rather painful procedure because it involves division of many structures. Incision of the pleural space and irritation of the intercostal nerves in particular can cause severe pain. For this reason, effective postoperative analgesia is mandatory to allow deep breathing and thus avoid complications such as pneumonia and atelectasis.

    → with epidural catheter, supportive i.v. analgesia and possibly regional measures (intercostal block).

    Follow this link to Prospect (Procedures Specific Postoperative Pain Management)

    Postoperative care:

    Opening the chest will create a pneumothorax. In order to remove the air from the chest cavity and allow the lungs to expand, one or two chest tubes are inserted at the end of the procedure, which create a vacuum via suction (15 cm to 20 cm water column).

    Monitoring of the chest tube(s): In correctly inserted chest tubes the water level in the collection chamber moves synchronously with the patient’s breathing. Persistent “bubbling” in the collection chamber indicates either a continued air leak or an improperly attached connector in the tube system.

    Blood clots may block the tube(s) time and again. These may often be removed by milking the tubes toward the collection chamber. Beware of tension pneumothorax due to blocked tube(s); irrigate with bladder syringe filled with saline 0.9%, if necessary.

    The digital chest tube drainage and monitoring system Thopaz+ from Medela may be used as an alternative to the analog system. Unlike analog systems, Thopaz+ reliably controls the negative pressure in the patient's chest and digitally (and silently) monitors the key treatment parameters. Clinical studies have demonstrated that the Medela chest tube system improves the therapeutic success and optimizes care.

    Chest tube removal: Remove the tubes on post-operative day 2 to 8 after the air and fluid losses have ceased. Chest tubes may only be removed once there is no more air loss. Secretions should have dropped to <100 ml/day. Then stop suction and take follow-up radiograph; in absence of pneumothorax remove the tube(s). Two hours after removing the tube(s) always take a chest radiograph! In case of pneumothorax re-institute suction.

    Bronchoscopic inspection and cleaning of the bronchial tree in atelectasis or severe mucus accumulation.

    Deep venous thrombosis prophylaxis:

    Unless contraindicated, the moderate to high risk of thromboembolism calls for prophylactic physical measures and low-molecular-weight heparin, possibly adapted to weight or dispositional risk, until full ambulation is reached.

    Note: Renal function, HIT II (history, platelet check)

    Ambulation:

    As early as possible under adequate analgesia to avoid shallow breathing and prevent pneumonia and atelectasis.

    Physical therapy:

    Pneumonia prophylaxis is mandatory: Pre- and postoperative breathing exercises! Triflo incentive spirometer and related physical therapy.