Why Movement, Not Just Compression?
Rethinking How We Support Lymphatic Flow
Following breast cancer surgery and radiotherapy, swelling can develop within the breast, chest wall or arm as normal lymphatic drainage pathways are altered.
Compression has an established role in lymphoedema management. For breast oedema, patients may be recommended compression bras or other garments designed to provide sustained external pressure and help manage swelling.
But this raises an interesting question:
Is sustained compression the only way we can physically support lymphatic fluid movement?
For us, that question led to a different way of thinking about pressure and the role normal body movement might play in creating it.
Two different ways of applying pressure
Compression garments and DP-Tx™ approach external support differently.
Compression garments are available in different compression levels, with higher levels applying greater external pressure. The appropriate garment and compression level are selected according to the patient's clinical needs, and correct fit and ongoing review are important.
DP-Tx™ does not have a compression level because it does not rely on sustained compression.
Instead, it works with normal body movement to create gentle, changing differential pressure against the skin – producing the passive massage effect at the heart of the technology.
This means the question isn't “How much compression does DP-Tx™ provide?” but rather “What happens when normal movement is used to create changing pressure against the tissues?”
That distinction is fundamental to understanding why DP-Tx™ represents a different approach to supporting lymphatic fluid movement.
What do we know about compression for breast oedema?
Compared with the extensive literature examining compression for limb lymphoedema, research specifically investigating compression for breast oedema remains limited.
One randomised pilot study involving 56 women with breast oedema following breast-conserving surgery and radiotherapy compared a compression-type sports bra with a standard bra over nine months.
Breast tissue water and the sensation of heaviness decreased in both groups, but researchers found no significant difference between the compression-bra and standard-bra groups.
This does not mean compression has no role in managing breast oedema.
It does, however, highlight how much there is still to understand about the management of lymphatic fluid within the breast and surrounding tissues – and whether other forms of physical support may also have a role.
Are we looking at the breast and arm as one lymphatic system?
There is another question that particularly interests us.
Research into breast cancer-related lymphoedema commonly assesses swelling according to where it presents. Studies investigating breast oedema understandably focus on changes within the breast, while much of the lymphoedema literature measures changes within the arm.
But physiologically, the breast, chest, axillary region and upper limb are not independent systems.
Following breast cancer treatment, lymphatic pathways through these regions may have been altered or disrupted, while fluid must continue to find available pathways through an interconnected lymphatic network.
This raises a question that appears to have received far less attention:
When evaluating an intervention applied to the breast or arm, should we also be considering what is happening across the connected drainage region rather than measuring each area in isolation?
For example, when an intervention is applied to the breast, what is happening within the arm? And when an intervention is applied to the arm, what is happening within the breast and surrounding drainage region?
We don't yet have the evidence to answer those questions.
But asking them may help us better understand lymphatic management following breast cancer treatment, particularly if we want to move towards earlier intervention rather than waiting until measurable swelling becomes established.
Changing pressure is another way of supporting fluid movement
Intermittent pneumatic compression provides an interesting example of a different physical approach to lymphoedema management.
Unlike a static compression garment, pneumatic compression uses sequential or intermittent changes in external pressure to encourage fluid movement. Depending on the device, treatment may involve the limb and may also extend into proximal areas of the body.
Pneumatic compression and DP-Tx™ are very different technologies, and we are not suggesting that they work in the same way.
What interests us is the broader principle:
External pressure does not necessarily have to remain constant to influence fluid movement.
That led us to another question:
Could normal body movement itself be used to create a gentle, continually changing interaction with the tissues?
This is where DP-Tx™ takes a different approach
DP-Tx™ was developed around the principle of working with the movement people already make throughout their day.
Rather than relying on sustained compression, the technology uses normal body movement to generate gentle, changing differential pressure against the skin.
This movement-activated interaction creates the passive massage effect that underpins DP-Tx™.
Importantly, this isn't about saying movement is better than compression.
It is about recognising that they are different approaches and asking whether movement-activated differential pressure could provide clinicians and patients with an additional tool.
For some patients, that may mean an alternative where sustained compression is difficult to tolerate or impractical. For others, it may eventually have a role alongside existing lymphoedema management strategies.
Could we also think about support earlier?
Perhaps the bigger question isn't simply how we manage established lymphoedema.
Following surgery, lymph-node removal or radiotherapy, we may already know that normal lymphatic pathways have been altered, sometimes well before measurable swelling develops in the arm.
So, should we always wait for swelling to become established before considering ways to support lymphatic fluid movement?
Or could gentle, movement-activated support have a role earlier in the pathway?
That is one of the questions we believe deserves further clinical investigation.
Another tool, not an either/or choice
Compression remains an important component of lymphoedema management.
DP-Tx™ isn't being developed on the premise that clinicians need to choose between compression and movement.
Instead, we are exploring whether movement-activated differential pressure could provide another option within the lymphoedema management toolkit, particularly in areas such as the breast and chest, in early intervention, or in circumstances where sustained compression may be difficult to tolerate or impractical.
Perhaps the question therefore isn't:
Compression or movement?
Perhaps it is:
How can we make better use of different physical approaches to support lymphatic fluid movement and give clinicians and patients more options to work with?
Further reading / References
Johansson K, Jönsson C, Björk-Eriksson T. Compression Treatment of Breast Edema: A Randomized Controlled Pilot Study. Lymphat Res Biol. 2020;18(2):129–135.
Zaleska MT, Krzesniak NE. The Intermittent Pneumatic Compression Influences Edema Fluid Movement and Promotes the Compensatory Drainage Pathways in Patients with Breast Cancer Related Lymphedema. Lymphat Res Biol. 2025;23(3):160–168.
