La d An intern placed an intercostal drainage tube in a patient. Which of the following steps is incorrect?

Explanation

## Correct Answer: D. Insertion of the needle, which will be between your ribs on your back Intercostal chest tube (ICD) insertion follows a standardized anatomical and procedural protocol to avoid neurovascular injury and ensure proper drainage. The question tests knowledge of the CORRECT technique. Option D is incorrect because it describes insertion "between your ribs on your back," which violates the fundamental principle of ICD placement. The standard technique mandates insertion in the **anterior axillary line** (not posterior/back), typically at the **5th intercostal space** (nipple level in males, or 4th-6th space depending on clinical need). The tube is inserted **above the upper border of the rib** to avoid the intercostal neurovascular bundle (artery, vein, nerve) that runs in the costal groove along the inferior border of each rib. The incision is made through skin, subcutaneous tissue, and fascia, followed by **digital exploration** to confirm entry into the pleural cavity and rule out adhesions. Posterior placement (as described in option D) risks injury to the scapula, latissimus dorsi, and posterior neurovascular structures, and is contraindicated in standard practice. Indian surgical guidelines (Bailey & Love, Sabiston) and ATLS protocols universally recommend the anterior/mid-axillary approach for safe ICD insertion. ## Why the other options are wrong **A. Inserted above the upper border of the rib** — This is CORRECT technique. Insertion above the upper border of the rib avoids the intercostal neurovascular bundle (artery, vein, nerve) that runs in the costal groove along the inferior border. This is a cardinal rule taught in all surgical textbooks and is NOT the incorrect step being tested. **B. Identified 5th intercostal space anterior to mid axillary line to place the tube** — This is CORRECT technique. The 5th intercostal space at the anterior/mid-axillary line (nipple level) is the standard landmark for ICD insertion in pneumothorax and pleural effusion. This is the universally accepted approach in Indian surgical practice and is NOT the incorrect step. **C. Incised and digitally explored** — This is CORRECT technique. After incision through skin and fascia, digital exploration (finger sweep) is mandatory to confirm pleural entry, break down adhesions, and ensure safe tube passage. This is a critical safety step in all ICD insertion protocols and is NOT the incorrect step. ## High-Yield Facts - **5th intercostal space at mid-axillary line** is the standard landmark for ICD insertion (nipple level in males). - **Insertion above the upper border of the rib** avoids the intercostal neurovascular bundle running in the costal groove of the inferior border. - **Digital exploration** after incision is mandatory to confirm pleural cavity entry and break adhesions before tube insertion. - **Anterior/mid-axillary approach** is the standard; posterior placement risks scapular and neurovascular injury and is contraindicated. - **Blunt dissection and finger guidance** (not sharp dissection) is used to create a tract and prevent organ perforation. ## Mnemonics **ICD Insertion: SAFE** **S**pace (5th intercostal) | **A**bove upper border of rib | **F**ascial incision + digital exploration | **E**ntry into pleural cavity confirmed. Use this to recall all correct steps and identify deviations. **Avoid the NVB** Neurovascular Bundle runs in the costal groove of the **inferior border** of each rib → insert **above the upper border** to stay clear. Memory hook: 'Go high, stay dry (of blood).' Prevents intercostal artery/vein/nerve injury. ## NBE Trap NBE pairs correct anatomical landmarks (5th space, mid-axillary line, above upper rib border) with an obviously incorrect posterior placement to test whether students can identify the ONE step that violates standard protocol. The trap is that options A, B, C are all textbook-correct, making students second-guess themselves—but the question explicitly asks for the INCORRECT step, making D the clear answer. ## Clinical Pearl In Indian emergency departments and trauma centers, the anterior axillary approach is universally taught because it allows safe ICD insertion even in supine or semi-conscious patients, and avoids the risk of posterior tube malposition causing inadequate drainage or organ injury. A posteriorly placed tube is a common complication in poorly trained personnel and leads to persistent pneumothorax or hemothorax. _Reference: Bailey & Love's Short Practice of Surgery, Ch. 19 (Thoracic Surgery); Sabiston Textbook of Surgery, Ch. 36 (Chest Wall, Pleura, Mediastinum, and Diaphragm)_