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One 20 mark question of thoracotomy with steps..types..I want to write in neet pg university exam

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thoracotomy types steps surgical procedure NEET PG surgery exam answer

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https://www.ncbi.nlm.nih.gov/books/NBK557600

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posterolateral thoracotomy incision steps diagram

A composite medical figure illustrating surgical management of a horseshoe lung with extralobular sequestration. Panel A is an anatomical diagram showing bilateral posterolateral thoracotomy incision lines (red) on the left and right posterior thoracic wall. Panel B is an intraoperative clinical photograph during a left thoracotomy, distinguishing the native left lung from the abnormal 'protruding lung' tissue crossing the mediastinum. Panel C shows the surgical field identifying the descending aorta and a systemic abnormal blood vessel supplying the sequestered lung segment. Panel D displays the gross pathology specimen of the resected horseshoe lung, consisting of the right lower lobe and the continuous protruding lung tissue. The specimen appears dark and congested, consistent with chronic infection or aspergillosis. This content serves as an educational resource for thoracic surgery and congenital pulmonary malformations.

A composite medical figure illustrating surgical management of a horseshoe lung with extralobular sequestration. Panel A is an anatomical diagram showing bilateral posterolateral thoracotomy incision lines (red) on the left and right posterior thoracic wall. Panel B is an intraoperative clinical photograph during a left thoracotomy, distinguishing the native left lung from the abnormal 'protruding lung' tissue crossing the mediastinum. Panel C shows the surgical field identifying the descending aorta and a systemic abnormal blood vessel supplying the sequestered lung segment. Panel D displays the gross pathology specimen of the resected horseshoe lung, consisting of the right lower lobe and the continuous protruding lung tissue. The specimen appears dark and congested, consistent with chronic infection or aspergillosis. This content serves as an educational resource for thoracic surgery and congenital pulmonary malformations.

Educational composite figure demonstrating surgical planning and intraoperative execution for Robotic-Assisted Thoracic Surgery (RATS). Panel A is a schematic anatomical diagram of the left posterolateral chest wall. Red circles indicate specific port placements at the 6th, 8th, and 10th intercostal spaces (ICS), with the 8th ICS marked 'C' to denote the camera port. A curved red line indicates the site for a posterior skin incision required for chest wall resection. Panel B is a clinical photograph of the intraoperative field with the da Vinci surgical system docked. The surgical site is prepared with povidone-iodine and bordered by blue sterile drapes. Robotic arms encased in sterile plastic draping are positioned over the patient. A surgeon's hand is seen manipulating a clear suction/irrigation tube near the thoracotomy opening, which is illuminated by a red light source. A metal retractor is visible at the edge of the incision, which exposes the underlying muscle and rib tissue involved in the resection of a posterior mediastinal mass.

Educational composite figure demonstrating surgical planning and intraoperative execution for Robotic-Assisted Thoracic Surgery (RATS). Panel A is a schematic anatomical diagram of the left posterolateral chest wall. Red circles indicate specific port placements at the 6th, 8th, and 10th intercostal spaces (ICS), with the 8th ICS marked 'C' to denote the camera port. A curved red line indicates the site for a posterior skin incision required for chest wall resection. Panel B is a clinical photograph of the intraoperative field with the da Vinci surgical system docked. The surgical site is prepared with povidone-iodine and bordered by blue sterile drapes. Robotic arms encased in sterile plastic draping are positioned over the patient. A surgeon's hand is seen manipulating a clear suction/irrigation tube near the thoracotomy opening, which is illuminated by a red light source. A metal retractor is visible at the edge of the incision, which exposes the underlying muscle and rib tissue involved in the resection of a posterior mediastinal mass.

A clinical photograph of a fresh intraoperative surgical site on the posterolateral hemithorax. The image demonstrates a long, oblique incision approximately starting 2 cm lateral to the spinous process and extending inferiorly and laterally toward the midpoint of the XIIth rib. The incision edges are sharp and exhibit minor active bleeding from the dermal and subcutaneous layers. The surrounding skin is prepped for surgery, covered by a clear adhesive surgical drape (incise drape), showing a slightly reflective surface. This visual illustrates a standard posterolateral thoracotomy or retroperitoneal approach, commonly utilized in thoracic or urological surgeries. The anatomical landmarks and orientation are critical for understanding surgical access to the thoracic cavity or kidney.

A clinical photograph of a fresh intraoperative surgical site on the posterolateral hemithorax. The image demonstrates a long, oblique incision approximately starting 2 cm lateral to the spinous process and extending inferiorly and laterally toward the midpoint of the XIIth rib. The incision edges are sharp and exhibit minor active bleeding from the dermal and subcutaneous layers. The surrounding skin is prepped for surgery, covered by a clear adhesive surgical drape (incise drape), showing a slightly reflective surface. This visual illustrates a standard posterolateral thoracotomy or retroperitoneal approach, commonly utilized in thoracic or urological surgeries. The anatomical landmarks and orientation are critical for understanding surgical access to the thoracic cavity or kidney.

This clinical photograph demonstrates the preoperative surgical positioning and skin marking for a posterolateral thoracotomy in a patient with spontaneous pneumothorax. The patient is placed in the lateral decubitus position on an operating table, lying on their healthy side with the upper arm extended anteriorly toward the head to facilitate surgical access. A surgical marker has been used to delineate the incision site. The marking consists of a solid angled line, where one branch follows the line of the spinous processes and the other aligns with the spinal edge of the scapula. A dotted line bisects this angle, representing the planned cutaneous incision path. The positioning is designed to provide optimal exposure of the thoracic cavity while minimizing muscle sectioning, specifically targeting the planes between the latissimus dorsi, trapezius, serratus anterior, and rhomboid muscles. Visible equipment includes surgical drapes, a surgical cap, and anesthesia tubing.

This clinical photograph demonstrates the preoperative surgical positioning and skin marking for a posterolateral thoracotomy in a patient with spontaneous pneumothorax. The patient is placed in the lateral decubitus position on an operating table, lying on their healthy side with the upper arm extended anteriorly toward the head to facilitate surgical access. A surgical marker has been used to delineate the incision site. The marking consists of a solid angled line, where one branch follows the line of the spinous processes and the other aligns with the spinal edge of the scapula. A dotted line bisects this angle, representing the planned cutaneous incision path. The positioning is designed to provide optimal exposure of the thoracic cavity while minimizing muscle sectioning, specifically targeting the planes between the latissimus dorsi, trapezius, serratus anterior, and rhomboid muscles. Visible equipment includes surgical drapes, a surgical cap, and anesthesia tubing.

Here is a complete, exam-ready 20-mark answer on Thoracotomy for NEET PG / University Surgery examination.

THORACOTOMY

(20 Marks - Surgery Long Answer)

DEFINITION

Thoracotomy is a surgical incision made through the chest wall to gain access to the thoracic cavity (pleural space, lungs, heart, esophagus, thoracic aorta, or mediastinum).

INDICATIONS

Elective (Planned):
  • Lung cancer - lobectomy, pneumonectomy
  • Esophageal resection (esophagectomy)
  • Cardiac surgery - valve repair/replacement, CABG (when sternotomy is unsafe or re-do)
  • Mediastinal tumors, thymectomy
  • Thoracic aortic aneurysm / dissection
  • Decortication of lung (chronic empyema / fibrothorax)
  • Congenital lung anomalies (sequestration, CCAM)
  • Tissue biopsy
Emergency:
  • Massive haemothorax not controlled by chest drain
  • Penetrating cardiac wounds / cardiac tamponade
  • Traumatic aortic injury
  • Resuscitative thoracotomy (agonal patient, penetrating thoracic trauma)

TYPES OF THORACOTOMY

1. Posterolateral Thoracotomy (MOST COMMON / GOLD STANDARD)

  • Position: Lateral decubitus (affected side up)
  • Incision: Passes 1-2 cm below the tip of the scapula, extending posteriorly and superiorly between the medial border of scapula and spine
  • Gives access to: Lung and major bronchi, thoracic aorta, esophagus, posterior mediastinum, pleura
  • Uses: Lobectomy, pneumonectomy, esophagectomy, aortic surgery
  • Note: Best overall exposure of thoracic cavity

2. Anterolateral Thoracotomy

  • Position: Supine or slightly tilted
  • Incision: Over 4th/5th intercostal space from mid-axillary line curving parasternally, under the breast mound; pectoral muscles divided with diathermy
  • Types:
    • Supra-mammary - above the breast (superior access, cardiac surgery)
    • Infra-mammary - below the breast (females, better cosmesis)
  • Uses: Emergency cardiac surgery, left heart (mitral valve), left lung procedures, trauma
  • Advantage: Patient remains supine - better cardiopulmonary stability

3. Median Sternotomy

  • Position: Supine
  • Incision: Vertical midline incision through sternum with a sternal saw
  • Gives access to: Heart, ascending aorta, arch, both pleural cavities, anterior mediastinum, thymus
  • Uses: Open heart surgery (CABG, valve surgery, cardiac transplant)
  • Note: Technically this is a sternotomy, but often classified under thoracic incisions

4. Anterior Thoracotomy (Emergency / Left-sided)

  • Position: Supine
  • Incision: 4th or 5th interspace taken down with scalpel; pleura opened with scissors
  • Uses: Resuscitative thoracotomy, cardiac tamponade, massive left haemothorax
  • Advantage: No special positioning required - done rapidly at bedside or in ED
  • Can be extended to clamshell thoracotomy if needed

5. Clamshell (Bilateral Transverse Thoracosternotomy) Thoracotomy

  • Position: Supine
  • Incision: Bilateral anterior thoracotomies connected by transverse sternotomy across 4th interspace - resembles an open clamshell
  • Gives access to: Both pleural cavities + mediastinum simultaneously
  • Uses: Double lung transplant, bilateral pulmonary metastasectomy, massive thoracic trauma, superior vena cava surgery
  • Note: Maximum bilateral exposure but associated with significant morbidity

6. Axillary Thoracotomy

  • Position: Lateral decubitus, arm elevated
  • Incision: 4th interspace through axilla, between pectoralis major (anterior) and latissimus dorsi (posterior)
  • Uses: Apical blebs (spontaneous pneumothorax), first rib resection (thoracic outlet syndrome), sympathectomy
  • Advantage: Muscle-sparing, excellent cosmesis; long thoracic nerve must be protected
  • Disadvantage: Limited exposure

7. Video-Assisted Thoracoscopic Surgery (VATS) - Minimally Invasive

  • Multiple small port incisions (uniportal, two-port, or three-port)
  • Avoids rib-spreading
  • Reduced postoperative pain, shorter hospital stay
  • Now the approach of choice for early-stage lung resections
  • Limitations: Limited for complex surgery, steep learning curve

STEPS OF POSTEROLATERAL THORACOTOMY (STANDARD PROCEDURE)

Pre-operative Preparation

  1. Anaesthesia: General anaesthesia with double-lumen endotracheal tube (allows one-lung ventilation - collapse of operated lung, ventilate contralateral lung)
  2. Positioning: Lateral decubitus - affected side up, arm placed forward on support, axillary roll placed, table flexed to widen intercostal spaces
  3. Skin prep: Chin to toes with iodine/chlorhexidine solution
  4. Draping: Standard thoracic draping

Steps of Incision (Surgical Technique)

Step 1 - Skin Incision:
  • Incision placed 1-2 cm below the tip of the scapula, curving posteriorly and superiorly between the medial border of the scapula and the spine
Step 2 - Division of Subcutaneous Tissue:
  • Deepened through subcutaneous fat to the fascia overlying latissimus dorsi
Step 3 - Division of Latissimus Dorsi:
  • Divided in line with the skin incision using coagulating diathermy
  • Careful haemostasis maintained
Step 4 - Serratus Anterior and Deep Plane:
  • A plane of dissection is developed manually, deep to scapula and serratus anterior
  • Serratus anterior may be divided near its attachment to ribs 6, 7, 8 (if needed) - or mobilised along its inferior border (muscle-sparing)
Step 5 - Rib Counting:
  • Ribs counted from highest palpable rib (usually 2nd)
  • Approach usually through 5th or 6th intercostal space
Step 6 - Periosteal Incision:
  • 6th rib periosteum scored with diathermy near its upper border (to avoid neurovascular bundle running in the subcostal groove of the rib above)
  • Periosteal elevator lifts periosteum off the superior border of the rib
  • Alternatively: intercostal muscle cut with diathermy just above the rib (just superior to upper border of lower rib)
Step 7 - Entering the Pleura:
  • Pleura revealed and entered by blunt dissection
  • Pleural cavity entered (lung collapses due to double-lumen tube)
Step 8 - Rib Spreader:
  • Finochietto rib retractor inserted between adjacent ribs
  • Opened gently and progressively to prevent rib fracture
  • Provides adequate exposure of thoracic contents
Step 9 - Operative Procedure:
  • Intended surgery performed (lobectomy, pneumonectomy, esophagectomy, etc.)
Step 10 - Closure:
  • Pericostal sutures placed around adjacent ribs to approximate them
  • Serratus anterior and latissimus dorsi closed in layers
  • Subcutaneous tissue and skin closed
  • Intercostal drain(s) inserted through a separate stab incision - to drain blood/air and allow lung re-expansion
  • Drain connected to an underwater seal drainage system

Post-operative Care

  • Chest drain management and monitoring
  • Analgesia - critical: epidural catheter (placed pre-op or intra-op), paravertebral block, or intercostal nerve blocks with long-acting local anaesthetic
  • Chest physiotherapy and early ambulation
  • Monitoring for complications

COMPLICATIONS

Immediate (Intraoperative)

  • Haemorrhage (internal mammary artery, intercostal vessels, great vessels)
  • Lung injury
  • Injury to phrenic or vagus nerve
  • Air embolism

Early (Post-operative)

  • Bleeding / Haemothorax
  • Pneumothorax / Air leak (persistent)
  • Infection - wound infection, pneumonia, empyema
  • Atelectasis and respiratory failure
  • Pleural effusion
  • Cardiac arrhythmias
  • Bronchopleural fistula

Late

  • Post-thoracotomy pain syndrome - pain along the incision persisting >2 months (intercostal neuralgia from costal neurovascular bundle injury)
  • Shoulder dysfunction - from division of serratus anterior / damage to long thoracic nerve
  • Chronic empyema
  • Chest wall deformity

RESUSCITATIVE THORACOTOMY (EMERGENCY)

  • Performed in agonal/peri-arrest patients with penetrating thoracic trauma
  • Left anterior thoracotomy approach (4th/5th intercostal space)
  • Goals:
    • Release cardiac tamponade
    • Control haemorrhage
    • Open cardiac massage
    • Cross-clamp descending aorta to restore coronary/cerebral perfusion
  • No special positioning or equipment required
  • Can be converted to clamshell if bilateral access needed

COMPARISON TABLE

FeaturePosterolateralAnterolateralClamshellAxillary
PositionLateral decubitusSupineSupineLateral
ExposureBest unilateralModerateBest bilateralLimited
Emergency useNoYesYes (trauma)No
Muscle dividedLatissimus dorsiPectoralisBoth sidesMinimal
Main useLung/esophageal surgeryCardiac/emergencyTransplant/traumaBleb/sympathectomy

KEY EXAM POINTS (MNEMONICS)

  • Most common thoracotomy = Posterolateral
  • Emergency thoracotomy = Left anterior (4th/5th ICS)
  • Double lung transplant = Clamshell
  • Cosmetically best = Axillary (muscle-sparing)
  • Intercostal neurovascular bundle runs in subcostal groove - always enter just above the lower rib (superior border of lower rib)
  • Double-lumen tube is mandatory for posterolateral thoracotomy (one-lung ventilation)
  • Post-thoracotomy pain syndrome = pain >2 months along incision site
  • VATS = now preferred for early-stage lung cancer over open thoracotomy
Sources:
  • Bailey and Love's Short Practice of Surgery 28th ed., Ch. 60 (pp. 1009-1010)
  • Fischer's Mastery of Surgery 8th ed., Ch. 82
  • StatPearls - Thoracotomy (NCBI)
Diagrams to draw in exam:
  1. Patient positioning for posterolateral thoracotomy (lateral decubitus with arm forward)
  2. Skin incision line - 1-2 cm below scapula tip, curving posterosuperiorly
  3. Layers encountered: skin → subcutaneous → latissimus dorsi → serratus anterior → intercostal muscles → pleura
  4. Clamshell incision (bilateral transverse)
This answer covers definition, indications, all types with comparisons, detailed steps, complications, and emergency thoracotomy - giving you a complete 20-mark response.

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clamshell bilateral thoracotomy incision diagram

Anatomical diagram and surgical illustration of a 'clamshell' thoracotomy approach (bilateral anterolateral thoracotomy with transverse sternotomy). The diagram depicts a wide surgical field across the anterior chest wall, extending laterally toward the axillary lines. Key mediastinal and thoracic structures are exposed and labeled, including the heart centrally with the right ventricle (RV) prominently visible, and the ascending aorta (Ao) superior to it. The hilum is visible bilaterally, providing access to the pulmonary structures. The image demonstrates the extensive exposure of the anterior and posterior mediastinum provided by this incision, which is commonly utilized in complex cardiothoracic procedures, such as unifocalization of major aortopulmonary collateral arteries (MAPCAs) or lung transplantation, particularly in cases involving significant scarring from previous median sternotomies.

Anatomical diagram and surgical illustration of a 'clamshell' thoracotomy approach (bilateral anterolateral thoracotomy with transverse sternotomy). The diagram depicts a wide surgical field across the anterior chest wall, extending laterally toward the axillary lines. Key mediastinal and thoracic structures are exposed and labeled, including the heart centrally with the right ventricle (RV) prominently visible, and the ascending aorta (Ao) superior to it. The hilum is visible bilaterally, providing access to the pulmonary structures. The image demonstrates the extensive exposure of the anterior and posterior mediastinum provided by this incision, which is commonly utilized in complex cardiothoracic procedures, such as unifocalization of major aortopulmonary collateral arteries (MAPCAs) or lung transplantation, particularly in cases involving significant scarring from previous median sternotomies.

A clinical photograph of a male patient's torso in a supine position, serving as an anatomical diagram for surgical planning. A dashed red line is superimposed across the anterior chest to illustrate the approximate incision site for a bilateral clamshell thoracotomy. The line follows a transverse, slightly curved path through the fourth or fifth intercostal spaces, extending from the left anterior axillary line, passing inferior to the nipples/inframammary creases, and crossing the sternum to the right anterior axillary line. Anatomical landmarks visible include the pectoralis major muscles, sternum, and axillary regions. The image demonstrates the extensive surgical access required for emergency thoracic trauma management, such as hemorrhage control or cardiac procedures. The educational focus is on the surface anatomy and topographical mapping necessary for emergent surgical interventions in a trauma setting.

A clinical photograph of a male patient's torso in a supine position, serving as an anatomical diagram for surgical planning. A dashed red line is superimposed across the anterior chest to illustrate the approximate incision site for a bilateral clamshell thoracotomy. The line follows a transverse, slightly curved path through the fourth or fifth intercostal spaces, extending from the left anterior axillary line, passing inferior to the nipples/inframammary creases, and crossing the sternum to the right anterior axillary line. Anatomical landmarks visible include the pectoralis major muscles, sternum, and axillary regions. The image demonstrates the extensive surgical access required for emergency thoracic trauma management, such as hemorrhage control or cardiac procedures. The educational focus is on the surface anatomy and topographical mapping necessary for emergent surgical interventions in a trauma setting.

This composite of clinical photographs illustrates the surgical incision and exposure techniques for a clamshell incision (bilateral antero-lateral thoracotomy) during a lung transplant or major thoracic procedure. Panel A shows the initial bilateral thoracotomies with a Wilson rib retractor positioned to widen the intercostal spaces, viewed from the head end. Panel B provides a detailed view of the right internal mammary vessels, which have been ligated with surgical clips (indicated by a yellow arrow) to prevent hemorrhage. Panel C demonstrates the performance of a midline sternotomy using a surgical power drill to divide the sternum, connecting the bilateral thoracotomies. Panel D displays the final surgical exposure with Tuffier retractors in place, providing a wide field of view that reveals the underlying thoracic structures and an elevated right diaphragmatic dome. The sequence highlights the progression from intercostal dissection to full sternal division and wide retraction for optimal hilar access.

This composite of clinical photographs illustrates the surgical incision and exposure techniques for a clamshell incision (bilateral antero-lateral thoracotomy) during a lung transplant or major thoracic procedure. Panel A shows the initial bilateral thoracotomies with a Wilson rib retractor positioned to widen the intercostal spaces, viewed from the head end. Panel B provides a detailed view of the right internal mammary vessels, which have been ligated with surgical clips (indicated by a yellow arrow) to prevent hemorrhage. Panel C demonstrates the performance of a midline sternotomy using a surgical power drill to divide the sternum, connecting the bilateral thoracotomies. Panel D displays the final surgical exposure with Tuffier retractors in place, providing a wide field of view that reveals the underlying thoracic structures and an elevated right diaphragmatic dome. The sequence highlights the progression from intercostal dissection to full sternal division and wide retraction for optimal hilar access.

Here are all the diagrams you should draw in your exam, from standard textbooks:

DIAGRAM 1 - Patient Positioning for Posterolateral Thoracotomy

(From Bailey & Love's Surgery)
Correct positioning for posterolateral thoracotomy - lateral decubitus with double-lumen tube, arm at 90°, incision below scapula angle
Key points to label when drawing:
  • Patient in lateral decubitus (affected side UP)
  • Double-lumen tube to protect underlying lung
  • Elbows at 90° to upper arms
  • Incision curves below angle of scapula (red dashed line)
  • Underlying leg bent for stability, upper leg cushioned

DIAGRAM 2 - Standard Incision Line for Posterolateral Thoracotomy

(From Fischer's Mastery of Surgery)
Standard posterolateral thoracotomy incision line showing the three anatomical points
Key points to label:
  • Point 1: 4th/5th ICS along midclavicular line
  • Point 2: One fingerbreadth BELOW tip of scapula
  • Point 3: Midpoint between spine and scapula (at height of middle of scapula)
  • The curve is smooth and connects all three points

DIAGRAM 3 - Muscle Layers Encountered During Posterolateral Thoracotomy

(From Bailey & Love's Surgery - most important diagram to draw)
Incision and muscle layers in posterolateral thoracotomy: latissimus dorsi (A), serratus anterior (B), intercostal muscles (C)
Key points to label:
  • A = Latissimus dorsi - divided in line with skin incision
  • B = Serratus anterior - divided close to attachment at ribs 6, 7, 8 (or mobilised)
  • C = Intercostal muscles - stripped off the UPPER border of the rib (to avoid neurovascular bundle in subcostal groove)
  • Rib numbers 5, 6, 7, 8, 9 visible

DIAGRAM 4 - Double-Lumen Endotracheal Tube

(Most commonly asked in MCQ and theory both)
Double-lumen tube with tracheal and bronchial inflatable cuffs for one-lung ventilation
Key points to label:
  • Tracheal inflatable cuff (proximal)
  • Bronchial inflatable cuff (distal - goes into one bronchus)
  • Permits separate ventilation of right and left lungs
  • Operated lung collapsed; contralateral lung ventilated

DIAGRAM 5 - Positioning for Anterolateral (Emergency) Thoracotomy

(From Bailey & Love's Surgery)
Emergency anterolateral thoracotomy positioning - patient rolled 30°, incision in 5th ICS
Key points to label:
  • Patient rolled 30° with sandbag/dense pillow behind
  • Incision in 5th intercostal space (red dashed)
  • One arm forward (anaesthetist access), one arm back
  • No special equipment required - can be done in ED

DIAGRAM 6 - Clamshell (Bilateral Transverse) Thoracotomy

Clamshell thoracotomy incision - bilateral anterolateral incisions connected by transverse sternotomy showing heart and aorta exposure
Key points to label:
  • Bilateral anterior thoracotomies in 4th/5th ICS
  • Connected by transverse sternotomy across sternum
  • Bilateral access to both pleural cavities + mediastinum
  • RV (right ventricle) and Aorta exposed centrally
  • Used for: double lung transplant, massive bilateral trauma

SUMMARY - WHAT TO DRAW IN EXAM

DiagramTitleMarks it fetches
1Lateral decubitus positioningSteps question
2Incision line (3 points)Types question
3Muscle layers (A, B, C)Steps question - MOST IMPORTANT
4Double-lumen tubeAnaesthesia/steps
5Anterolateral/emergency positionEmergency thoracotomy
6Clamshell incisionTypes question
Exam tip: In a 20-mark answer, draw at least Diagrams 1, 3, and 4 - these are the three most commonly expected diagrams by examiners for a thoracotomy question.
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