PCR Tube Crushing or Deformation Under Lid Pressure

Symptom

PCR tubes become crushed, collapsed, or deformed after thermal cycling, potentially causing sample loss or compromised seal integrity. Tubes may show visible damage especially when using tube strips.

1. 1 Incompatible cap style or tube design not verified for specific thermal cycler model
2. 2 Excessive pressure from thermal cycler lid due to overtightening or malfunctioning spring mechanism
3. 3 Uneven distribution of tubes/strips across block creating pressure imbalance under lid

1. 1 Use PCR plastics selection tool to verify tube and cap style compatibility with thermal cycler manufacturer specifications
2. 2 Distribute tubes and strips evenly across block; place empty tubes if needed to balance lid pressure
3. 3 Verify thermal cycler lid is not overtightened and spring/closing mechanism functions correctly; consult manufacturer guides on tray and retainer usage

Related Video (3)

Bilibili (China-Accessible Mirrors) ★ 72

Step-by-Step PCR Experiment Protocol Guide

"Hands-on PCR protocol demonstration shows tube setup, thermal cycler loading, and consumables handling where crushing/deformation failures occur."

Addgene ★ 70

Polymerase Chain Reaction (PCR) Protocol

"PCR protocol tutorial demonstrates correct reaction setup and handling of PCR tubes/strips, directly informing correct technique for this consumable-related failure."

Bilibili (China-Accessible Mirrors) ★ 68

qPCR Principles, Experimental Workflow and Results Analysis

"qPCR workflow walkthrough covers plate/tube setup and qPCR instrumentation context relevant to plasticware and lid-pressure issues."