A Non-randomized, Open-Label Study to Evaluate the Safety and Effectiveness of the Dayspring Technology for Patients With Breast Cancer Related Lymphedema (BCRL) After Lymphatic Surgery

Inclusion Criteria:

* Males and females ≥ 18 years of age
* Willing to sign the informed consent and deemed capable of following the study protocol
* Subjects must have a diagnosis of upper extremity edema and have or will undergo lymphatic surgery with Dr. Nguyen
* Subjects must have a difference in volume greater than 3% between the limbs.

Exclusion Criteria:

* Individuals with a history or presence of a systemic disorder or condition that could place the patient at increased risk from sequential compression therapy
* Inability or unwillingness to participate in all aspects of study protocol and/or inability to provide informed consent
* Patients with exam results that would prevent safe and effective use of the study device (cellulitis, open-wounds, healing-wounds, etc.)
* Diagnosis of active or recurrent cancer, or less than 3 months at the time of initial evaluation from the completion of chemotherapy, radiation therapy or primary surgery for the treatment of cancer
* Patients must not have any diagnosed cognitive or physical impairment that would interfere with use of the device
* Diagnosis of lipedema
* Diagnosis of acute infection. The source of the infection must be treated for 2 weeks prior to admittance into the study
* Diagnosis of acute thrombophlebitis (in last 2 months)
* Diagnosis of pulmonary embolism or deep vein thrombosis within the previous 6 months
* Diagnosis of pulmonary edema
* Diagnosis of congestive heart failure (uncontrolled)
* Diagnosis of chronic kidney disease
* Diagnosis of epilepsy
* Patients with poorly controlled asthma
* Women who are pregnant, planning a pregnancy or nursing at study entry
* Participation in any clinical trial of an investigational substance or device during the past 30 days
* Bilateral limb edema