How do you make auto-control in cross-matching?

Auto-control in cross-matching can be achieved by implementing a systematic process that includes the use of control samples alongside patient samples. This involves performing serological tests on both the control and patient samples simultaneously to ensure consistent results. Additionally, utilizing automated systems can help streamline the process and reduce human error, while regular calibration and maintenance of equipment are crucial for accurate results. Lastly, documenting and reviewing results can aid in identifying discrepancies and improving overall accuracy.