Devices for performing a medical procedure within an appropriate interval and related systems and methods

A system for delivering a mixture to a patient, the system comprising:

• a delivery device configured to deliver a variable-viscosity mixture to a patient;
• one or more indicia that are configured to automatically transition from a first state to a second state, and then to a third state,
• a timing mechanism;
• a temperature sensor configured to sense an ambient temperature,
• wherein the transition to the second state occurs at a first time point and the transition to the third state occurs at a second time point,
• wherein the transition from the first state to the second state at the first time point indicates a boundary between a first non-delivery period and a delivery period and indicates a start of the delivery period,
• wherein the transition from the second state to the third state at the second time point indicates a boundary between the delivery period and a second non-delivery period and indicates a start of the second non-delivery period,
• wherein the first non-delivery period is a set time interval, and
• wherein the timing mechanism comprises:
• a first timer configured to time the first non-delivery period, and
• a second timer configured to time the delivery period,
• wherein the timing mechanism automatically activates the second timer at the end of the first non-delivery period;
• and
• a volume sensor configured to detect a delivered volume of the variable-viscosity mixture,
• wherein a duration of the delivery period is determined by detecting the delivered volume of the variable-viscosity mixture.