Evaluation of Seismocardiography(SCG) for Assessing Fitness and Predicting Outcomes in Oesophageal Cancer Surgery

Oesophageal cancer is a common cause of cancer death worldwide. Curative treatment involves chemotherapy and surgery but has significant risks. Therefore, patient selection and improving physical fitness to withstand such major treatment is important to reduce the risk of complications. Physical fitness is traditionally measured by a specialised exercise test called Cardiopulmonary exercise testing (CPET), which can take up to one hour and requires specialised staff and expensive equipment such as a graded exercise bike or treadmill. Seismofit is a small device (smaller than a smartphone) used to estimate fitness in patients in under three minutes while lying down at rest. It measures the vibrations generated by the heart and, together with patient height, weight, age, and gender, accurately estimates fitness using an algorithm developed in healthy patients. The device has never been tested in a large group of oesophageal cancer patients to see if it can be used to predict complications in patients undergoing cancer treatment. In this study, patients undergoing Oesophageal cancer treatment with chemotherapy or chemoradiotherapy and surgery will have Seismofit measurements at various points during their treatment to see if we can predict complications and hospital stay. Secondly, this study will also evaluate the accuracy of Seismofit compared to the gold standard CPET results in cancer patients.