Can Saline Tract Sealing Make Lung Biopsy Much Safer?
Percutaneous computed tomography (CT)-guided lung biopsy remains a vital diagnostic tool worldwide. However, clinicians frequently encounter post-procedural pneumothorax as a common and troublesome complication. Saline tract sealing offers a simple, inexpensive technique to minimize this risk.
Clinical Impact of Saline Tract Sealing
Interventional radiologists routinely perform percutaneous lung biopsies to sample pulmonary lesions. Consequently, procedural complications like pneumothorax generate significant clinical worry. Pneumothorax occurs in up to a quarter of all biopsies. In addition, nearly five to ten percent of these patients require intercostal chest tube insertion. These adverse events prolong hospital stay and substantially inflate healthcare costs.
Commercial tract sealants, such as collagen plugs or fibrin glues, reduce pneumothorax incidence. Nevertheless, these devices add significant expense and may trigger adverse inflammatory reactions. Therefore, investigators evaluated normal saline instillation as an accessible and low-cost alternative.
Significant Reduction in Pneumothorax and Drain Insertion
A comprehensive systematic review and meta-analysis evaluated eleven studies comprising over 2,200 patients. Specifically, investigators compared normal saline tract sealing directly against standard biopsy protocols without sealant. The pooled analysis revealed that saline instillation reduced the overall risk of pneumothorax by forty-two percent. Furthermore, the technique demonstrated an even greater protective effect against tube thoracostomy.
Patients who received saline tract sealing experienced a seventy percent relative risk reduction in chest drain insertion. Moreover, these beneficial findings remained highly robust during sensitivity analyses. Even after researchers excluded studies that employed rapid patient rollover, the significant advantage persisted. Thus, the evidence confirms that saline instillation offers reliable protection against severe pleural air leaks.
Practical Implications for Interventional Radiology
Proceduralists can seamlessly integrate this technique into routine clinical workflows. During standard coaxial biopsy, the radiologist slowly withdraws the needle while injecting sterile normal saline into the parenchymal track. Consequently, the fluid creates a temporary physical barrier that prevents ambient air from traversing the pleural defect.
Additionally, saline instillation produces transient local parenchymal edema. This localized swelling effectively seals the needle track and facilitates rapid pleural healing. Importantly, sterile saline carries virtually zero risk of allergic reaction, foreign body response, or systemic embolization. Because normal saline is universally accessible and inexpensive, institutions across India and other emerging healthcare systems can readily adopt this practice.
Frequently Asked Questions
Q1: What is saline tract sealing in lung biopsy?
It is a technique where operators inject sterile normal saline along the needle tract during withdrawal to prevent air leaks.
Q2: Does saline tract sealing reduce chest tube placements?
Yes, meta-analytic data shows that saline sealing reduces the risk of chest drain insertion by seventy percent.
Q3: Does saline injection cause significant procedural complications?
No, clinical studies report an excellent safety profile with negligible risks compared to commercial sealant plugs or glues.
References
- Chan LM et al. Saline tract sealing to reduce pneumothorax rates following CT-guided percutaneous lung biopsy: a systematic review and meta-analysis. Eur Radiol. 2026 Nov 05. doi: 10.1007/s00330-026-12977-8. PMID: 42986400.
- Pille JJ, Pinheiro BN, Alano JM, Luna AM, Lopes de Souza MB, Irudhayaraj CDJ, Vitte SH, Rajaram R. Saline tract sealing to prevent pneumothorax and chest tube placement after computed tomography (CT)-guided lung biopsy: a systematic review and meta-analysis. Clin Radiol. 2026 Sep;100:107423.
- Kayaoglu AT, Mosqueira J, Varela V, Fuenmayor L, Kohler CP, Barbosa DS, Taneja A. Efficacy of saline tract sealing after CT-Guided lung biopsy: a systematic review and meta-analysis. Clin Radiol. 2026; doi: 10.1016/j.crad.2026.107401.
