A device includes a plurality of pneumatic modules and a pressure control device. The pneumatic modules are configured to attach to a patient's skin along edges of a wound and to translate a pneumatic pressure into a linear force. Each pneumatic module is configured to move between an extended position and a contracted position based on the pneumatic pressure within the pneumatic module. The pressure control device is configured to be pneumatically coupled to each of the pneumatic modules and configured to alternate the pneumatic modules between a first state and a second state. In the first state, the pneumatic pressure within a first set of the pneumatic modules is less than the pneumatic pressure within a second set of the pneumatic modules. In the second state, the pneumatic pressure within the first set of the pneumatic modules is greater than the pneumatic pressure within the second set of the pneumatic modules.
