Clinical Scenario: 63yo Male with severe LUTS and suspected BPH (Prostate 35 mL, Free Qmax = 8 mL/s, PVR = 180 mL). Referred to PFS to rule out BOO vs. Detrusor Underactivity (DU).
At t = 3s, a pre-void cough test is performed. Pves and Pabd spike symmetrically (55 cmH2O spike), Pdet remains stable, and EMG shows a clean burst. Quality check passes and voiding is authorized.
How Omission of Post-Void Cough Leads to a €10,000 Error
Because the post-void cough test was omitted at the end of the procedure, catheter displacement went undetected, leading the automated machine software to output a false diagnosis.
❌ Uncorrected Machine Printout (Blind Read)
Measured Qmax: 7.0 mL/s
Artifact PdetQmax: 85 cmH2O
Calculated BOOI: 71 (Severe BOO)
Fatal Error: Post-void cough omitted! Machine interprets sphincter squeeze as high detrusor pressure.
Outcome: Unnecessary TURP performed. Patient remains in total retention due to undetected Detrusor Atonia (> €10,000 wasted).
Full Validated Telemetry (Pabd Intact + Symmetrical Post-Cough)
💬 AI Case Mentor: Artifact & QA Consultation
Have questions about catheter displacement, rectal signal damping, or post-void cough quality control? Ask our expert AI mentor below.
AI Mentor: Welcome to Case 5! You are examining a classic mechanical squeeze artifact caused by catheter slip during straining. Notice how omitting the post-void cough hides the artifact, generating a false BOOI of 71. How can I assist with your evaluation?