How scalp cooling works
Scalp cooling (commonly known as "cold capping") is a means to lower scalp temperature to prevent hair loss during chemotherapy. Scalp cooling works by inducing vasoconstriction and reduction of metabolism, which leads to reduced blood flow to the hair follicles in the period of peak plasma concentration of the chemotherapy agent. As a result, the hair follicles become less vulnerable to damage from the chemotherapy agent.
There are currently two methods for scalp cooling:
Machine Cold Capping
This method employs a plug-in system which includes a hypothermia cap connected to a computer-operating cooling and control unit; the system circulates coolant through channels in the cap, and sensors ensure optimal temperature is continuously maintained throughout treatment.
This method is only used at participating cancer centers. You can check which cancer centers have these devices installed by visiting the following vendors' websites:
Manual Cold Capping
This method employs portable gel caps that are cooled (either by dry ice in a personal cooler or an infusions center’s bio-medical freezer) to an optimum temperature (typically between -26 and -36 degrees celsius) and rotated on the head every 20-30 minutes, depending on the company’s guidance.
These portable caps can be used at any location. You can see available vendors at the following websites:
The DigniCap and Paxman systems are the only two FDA-cleared systems at present. DigniCap is cleared for use in all patients who have solid tumors, and Paxman is currently cleared for use in patients with breast cancer. In a clinical trial, the DigniCap system prevented hair loss in 66.3% of patients with breast cancer who received neo/adjuvant chemotherapy, compared with the control group (patients who opted out of scalp cooling entirely), all of whom experienced significant hair loss. Women who received only taxane chemotherapy have had better results with cold caps and scalp cooling systems than women who received only anthracycline chemotherapy. There is currently no clinical or scientific evidence that the incidence of scalp metastases is increased in scalp cooled patients.
When Not to Cold Cap
Cold capping is not advised for pediatric patients or for adult patients who meet one or more of the criteria below:
Cold agglutinin disease
CNS malignancies (either primary or metastatic)
Squamous cell carcinoma of the lung
Small cell carcinoma of the lung
Cancers of the head and neck
Skin cancers including melanoma, squamous cell carcinoma, and Merkel cell carcinoma
Hematological malignancies treated with curative intent by chemotherapy
Solid tumor malignancies with a high likelihood of metastases in transit
Patients who are scheduled for bone marrow ablation chemotherapy
Patients who are scheduled to undergo skull irradiation
Patients who have previously received skull irradiation
The Rapunzel Project: A national non profit that promotes awareness of the existence and efficacy of cold cap therapy. Their website explains the scalp cooling process, identifies vetted cold cap providers, and lists all locations that offer machine capping as well as those who have a biomedical freezer to support manual capping. Helpful tips for cap users, and links to years of research and media coverage are also part of the site. They also donate biomedical freezers to supportive cancer centers.
Breastcancer.org: Provides an overview of cold capping during breast cancer treatment and a link to their forums where patients share their tips and experiences
More information and resources coming soon! Have a question in the meantime? Contact us: