Transbronchial biopsy results according to diffuse interstitial lung disease classification. Cryobiopsy versus...

Area of Science:

• Interventional Pulmonology
• Respiratory Medicine
• Diagnostic Procedures

Background:

• Transbronchial cryobiopsy (TBCB) is increasingly used for larger, better-quality lung samples compared to traditional forceps biopsy (TBLB).
• No prior multicenter studies have comprehensively compared the safety and diagnostic yield of TBCB versus TBLB across different interstitial lung disease (ILD) classifications.

Purpose of the Study:

• To compare the diagnostic yield and safety of transbronchial cryobiopsy (TBCB) against conventional transbronchial lung biopsy (TBLB) using forceps.
• To evaluate these parameters within the same patient cohort undergoing both procedures.

Main Methods:

• A prospective, multicenter clinical study involving 124 patients with ILD requiring lung biopsy.
• Procedures involved fluoroscopy, occlusion balloons, and standardized airway management (orotracheal intubation in 74%). TBLB was performed, followed by TBCB in each patient.
• Complications were systematically recorded post-procedure for both TBLB and TBCB.

Main Results:

• TBCB demonstrated a significantly higher diagnostic yield (47.6%) compared to TBLB (19.4%) (p<0.0001).
• This improved yield was particularly notable in idiopathic interstitial pneumonias (IIPs) and ILDs of known cause or association.
• Grade 3 bleeding occurred in 6.5% of TBCB procedures versus 0.8% for TBLB, indicating an increased bleeding risk with cryobiopsy.

Conclusions:

• Transbronchial cryobiopsy (TBCB) offers superior diagnostic yield compared to transbronchial lung biopsy (TBLB), especially for IIPs and known ILDs.
• The elevated risk of bleeding with TBCB underscores the critical importance of meticulous airway management and prophylactic use of occlusion balloons.