A modular medical device system comprises a parent module with a proximal end configured to remain outside the body of a patient and a distal end configured to go inside the body of a patient, the distal end comprising an inner lumen； and an adapter module comprising a proximal portion and a distal portion, an attachment mechanism positioned at the proximal portion and comprising an interfacing element and an elongated element, wherein at least a portion of the interfacing element compresses to engage the inner lumen of the parent module, and wherein the elongated element connects the attachment mechanism to the distal portion of the adapter module.
