With so much focus on dressing choices, it’s easy to forget the importance of wound cleansing. Cleaning a wound removes loose debris and planktonic (free-floating) bacteria, provides protection to promote an optimal environment for healing, and facilitates wound assessment by optimizing visualization of the wound. You should clean a wound every time you change a dressing, unless it’s contraindicated.
Here’s a review of how to choose and use a wound cleanser so you can see if your practice is up to date. (more…)
Each month, Apple Bites brings you a tool you can apply in your daily practice.
Description
A hydrocolloid dressing is a wafer type of dressing that contains gel-forming agents in an adhesive compound laminated onto a flexible, water-resistant outer layer. Some formulations contain an alginate to increase absorption capabilities. The wafers are self-adhering and available with or without an adhesive border and in various thicknesses and precut shapes for such body areas as the sacrum, elbows, and heels. Click here to see examples of
hydrocolloid dressings.
The guidelines include recommendations for practice, education, policy, and future resource. Strategies for implementation are given, as well as several useful appendices, such as:
• Debridement Decision-Making Algorithm
• A Guide to Dressing Foot Wounds
• PEDIS: Diabetes Foot Ulcer Classification System
• Offloading Devices
• Optimal Treatment Modalities.
PREPARE is a useful and patient-friendly website designed to help prepare people to make complex medical decisions. The website was developed by clinical researchers from the San Francisco VA Medical Center; the University of California, San Francisco; and NCIRE—The Veterans Health Research Institute.
PREPARE uses videos to provide concrete examples of how to identify what is most important in life; how to communicate that with family, friends, and doctors; and how to make informed medical decisions when the time comes. Users can also download a PDF of a PREPARE pamphlet.
Free guides for infection prevention from APIC
Download two free implementation guides for infection prevention from the Association for Professionals in Infection Control and Epidemiology (APIC):
This revised guide contains strategies for prevention, considerations for specific patient populations, evolving practices, and how to incorporate current regulations.
Topics include:
• C. difficile in pediatrics and skilled nursing facilities
• pathogenesis and changing epidemiology of C. difficile infection diagnosis
• environmental control
• new and emerging technologies
• tools and examples to help apply preventative measures, such as hand hygiene monitoring, environmental cleaning, and isolation compliance.
This guide includes infection-prevention standards, regulations, and best practices, as well as instructions, examples, and tools to conduct surveillance and risk assessments.
The number of people with diabetes who are meeting the ABC goals—hemoglobin A1C, blood pressure, and LDL cholesterol—has risen significantly in recent years, according to a study published by Diabetes Care. Patients meeting all three goals rose from about 2% in 1988 to about 19% in 2010.
Gains were made in each of the ABC goals, based on 2007 to 2010 data: 53% of patients met A1C goals, compared to 43% in 1988 to 1994 data; 51% met blood pressure goals, compared to 33%; and 56% met LDL goals, compared to 10%.
Younger people were less likely to meet A1C and cholesterol goals. Compared with non-
Hispanic whites, Mexican Americans were less likely to meet A1C and LDL goals and non-Hispanic blacks were less likely to meet blood pressure and LDL goals.
The researchers analyzed data from the National Health and Nutrition Examination Surveys from 1988–1994, 1999–2002, 2003–2006, and 2007–2010. Nearly 5,000 people age 20 or older participated.
Although progress had been made, the researchers conclude, “Despite significant improvement during the past decade, achieving the ABC goals remains suboptimal among adults with diabetes, particularly in some minority groups.”
Daily bathing with chlorhexidine-impregnated washcloths reduces infection risk
A study in The New England Journal of Medicine reports that daily bathing with chlorhexidine-impregnated washcloths reduces the risk of becoming infected with multidrug-resistant organisms and subsequent development of hospital-acquired bloodstream infections in intensive care unit patients.
“Effect of daily chlorhexidine bathing on hospital-acquired infection” included 7,727 patients in nine intensive care and bone marrow units in six hospitals. The units were randomly assigned to bathe patients with either no-rinse 2% chlorhexidine-impregnated washcloths or nonantimicrobial washcloths for 6 months; then, the units switched to the opposite product for 6 months.
The rate of infection with multidrug-resistant organisms was 23% lower in the chlorhexidine group and the rate of hospital-acquired bloodstream infection was 28% lower in the chlorhexidine group.
Patients tend not to wear custom-made footwear for preventing diabetic foot ulcers
Adherence to wearing prescription custom-made footwear was low among patients with diabetes, neuropathy, and a recently healed plantar foot ulcer, according to a study in Diabetes Care. The low adherence was particularly notable at home, where patients did the most walking.
Factors associated with higher adherence included lower body mass index, more severe foot deformity, and more appealing footwear.
Tedizolid works as well as linezolid in patients with acute bacterial skin infections
A JAMA study says that a 200-mg once-daily dose of oral tedizolid phosphate over 6 days was as effective as 600 mg of oral linezolid every 12 hours for 10 days in patients with acute bacterial skin and skin-structure infections, including cellulitis or erysipelas, major cutaneous abscesses, and wound infections.
A shorter course of tedizolid may be a “reasonable alternative” to linezolid for treating acute bacterial skin and skin-structure infections, the study concludes.
Water-based exercise improves ROM in patients with long-term arm lymphedema
A study of breast cancer survivors (median 10 years after surgery) with lymphedema found that a water-based exercise program improved shoulder range of motion (ROM).
The program consisted of at least twice-weekly water-based exercise for 8 weeks. At first, participants were supervised, but later they exercised independently. Although lymphedema status didn’t change, those who performed water-based exercise had an increase in ROM, showing improvement years after surgery.
Dehydrated amniotic membrane allograft possible option for treating chronic wounds
A dehydrated amniotic membrane allograft (EpiFix) was used to treat four patients whose wounds hadn’t closed after conservative and advanced measures and who had been referred for plastic procedures. A variety of wounds healed (located on the elbow, knee, hand, and ankle) after one to three applications of the amniotic material, which patients tolerated well. The wounds remained closed several months later.
Study casts doubt on MLD’s role in breast cancer–related lymphedema
A meta-analysis published in the World Journal of Surgical Oncology found the “current evidence” from randomized clinical trials “does not support” the use of manual lymphatic drainage (MLD) in preventing or treating lymphedema in patients with breast cancer.
The authors analyzed 10 randomized clinical trials with 566 patients.
CDC issues additional prevention steps for carbapenem-resistant Enterobacteriaceae
On Feb. 14, the Centers for Disease Control and Prevention (CDC) issued additional prevention steps for carbapenem-resistant Enterobacteriaceae (CRE). Increased reports of CRE prompted the action: Of the 37 unusual forms of CRE reported in the U.S., the last 15 have been reported since July 2012.
• When a CRE is identified in a patient with a history of an overnight stay in a healthcare facility (within the last 6 months) outside the U.S., send the isolate to a reference laboratory for confirmatory susceptibility testing and test to determine the carbapenem resistance mechanism.
• For patients admitted to healthcare facilities in the U.S. after recently being hospitalized (within the last 6 months) in countries outside the U.S., consider performing rectal screening cultures to detect CRE colonization, and place patients on contact precautions while awaiting the results.
Examples of Enterobacteriaceae include Klebsiella species and Escherichia coli. CRE are Enterobacteriaceae with high levels of resistance to antibiotics, including carbapenems. CRE infections most commonly occur among patients who are receiving antibiotics and significant medical treatment for other conditions.
At one time or another, all wound care professionals encounter a chronic wound, defined as a wound that fails to heal in an orderly and timely manner. Globally, about 67 million people (1% to 5% of the world’s population) suffer chronic wounds. In the United States, chronic wounds affect 6.5 million people and cost more than $25 billion annually to treat. (more…)
Guidelines for managing prosthetic joint infections released
The Infectious Diseases Society of America has released guidelines for diagnosing and managing prosthetic joint infections.
“Diagnosis and management of prosthetic joint infection: Clinical practice guidelines by the Infectious Diseases Society of America,” published in Clinical Infectious Diseases, notes that of the 1 million people each year who have their hips or knees replaced, as many as 20,000 will get an infection in the new joint.
The guidelines describe the best methods for diagnosing these infections, which are not easy to identify. Specifically, infection should be suspected in a patient who has any of the following: persistent wound drainage in the skin over the joint replacement, sudden onset of a painful prosthesis, or ongoing pain after the prosthesis has been implanted, especially if there had been no pain for several years or if there is a history of prior wound healing problems or infections.
Guidelines for treating infections are included and note that 4 to 6 weeks of I.V. or highly bioavailable oral antibiotic therapy is almost always necessary to treat prosthetic joint infections.
A decade of TIME
The TIME acronym (tissue, infection/inflammation, moisture balance, and edge of wound) was first developed more than 10 years ago to provide a framework for a structured approach to wound bed preparation and a basis for optimizing the management of open chronic wounds healing by secondary intention. To mark the event, the International Wound Journal has published “Extending the TIME concept: What have we learned in the past 10 years?”
The review points out four key developments:
• recognition of the importance of biofilms (and the need for a simple diagnostic)
• use of negative-pressure wound therapy
• evolution of topical antiseptic therapy as dressings and for wound lavage (notably, silver and polyhexamethylene biguanide)
• expanded insight into the role of molecular biological processes in chronic wounds (with emerging diagnostics).
The authors conclude, “The TIME principle remains relevant 10 years on, with continuing important developments that incorporate new evidence for wound care.”
Bed alarms fail to reduce patient falls
A study in Annals of Internal Medicine found that the use of bed alarms had no statistical or clinical effect on falls in an urban community hospital.
The 18-month trial included 16 nursing units and 27,672 inpatients. There was no difference in fall rates per 1,000 patient-days, the number of patients who fell, or the number of patients physically restrained on units using bed alarms, compared with control units.
Authors of “Effects of an intervention to increase bed alarm use to prevent falls in hospitalized patients: A cluster randomized trial” speculate the lack of response may be related to “alarm fatigue.”
Drug for HIV might help in Staph infections
A study in Nature reports that the drug maraviroc, used to treat HIV, might be useful for treating Staphylococcus aureus infections.
“CCR5 is a receptor for Staphylococcus aureus leukotoxin ED” found that the CCR5 receptor, which dots the surface of immune T cells, macrophages, and dendritic cells, is critical to the ability of certain strains of Staph to specifically target and kill cells with CCR5, which orchestrate an immune response against the bacteria. One of the toxins the bacterium releases, called LukED, latches on to CCR5 and subsequently punches holes through the membrane of immune cells, causing them to rapidly die.
When researchers treated cells with CCR5 with maraviroc and exposed the cells to the Staph toxin, they found maraviroc blocked toxic effects.
Dog able to sniff out C. difficile
A 2-year-old beagle trained to identify the smell of Clostridium difficile was 100% successful in identifying the bacteria in stool samples, and correctly identified 25 of 30 cases of patients with C. difficile, according to a study in BMJ.
“Using a dog’s superior olfactory sensitivity to identify Clostridium difficile in stools and patients: Proof of principle study” discusses how the dog was trained to detect C. difficile and concludes that although more research is needed, dogs have the potential for screening for C. difficile infection.
After-hours access to providers reduces ED use
Patients who have access to their primary healthcare providers after hours use emergency departments (EDs) less frequently, according to a study in Health Affairs.
“After-hours access to primary care practices linked with lower emergency department use and less unmet medical need” found that 30.4% of patients with after-hours access to their primary care providers reported ED use, compared with 37.7% of those without this access. In addition, those with after-hours access had lower rates of unmet needs (6.1% compared to 12.7%).
The findings come from the 2010 Health Tracking Household Survey of the Center for Studying Health System Change. The total sample included 9,577 respondents.
Neuropathic pain in patients with DPN might contribute to risk of falling
The presence of neuropathic pain in patients with diabetic peripheral neuropathy (DPN) contributes to gait variability, which could in turn contribute to the risk of falling, according to “Increased gait variability in diabetes mellitus patients with neuropathic pain.”
The study, published in the Journal of Diabetes and Its Complications, compared patients with at least moderate neuropathic pain with those who had no pain. Researchers used a portable device to measure gait parameters, such as step length and step velocity.
Amputation rates decrease significantly in patients with PAD
“Temporal trends and geographic variation of lower-extremity amputation in patients with peripheral artery disease (PAD): Results from U.S. Medicare 2000–2008” found that amputation rates have decreased significantly, but that significant patient and geographic variations remain.
The study, published in the Journal of the American College of Cardiology, found that among 2,730,742 older patients with identified PAD, the overall rate of lower extremity amputation decreased from 7,258 per 100,000 patients to 5,790 per 100,000. Predictors of lower-extremity amputation included male sex, black race, diabetes mellitus, and renal disease.
Editor’s note: Part 1 of this series, published in the September-October issue, discussed lymphedema pathology and diagnosis. This article, Part 2, covers treatment.
Traditional treatment approaches
Traditionally, lymphedema treatment has been approached without a clear understanding of the underlying structure and function of lymphatic tissues. Ineffective traditional treatments include elevation, elastic garments, pneumatic pumps, surgery, diuretics, and benzopyrones (such as warfarin). Because many traditional treatments are still overused and some may be appropriate for limited use, it’s important for clinicians to understand these approaches.
Elevation
As a sole therapy for lymphedema, elevation of the affected part provides only short-lived results. Ever-increasing macromolecular wastes retain water against the effects of gravity. Increased interstitial colloid osmotic pressure must be addressed by interventions targeted at improving lymphatic function—not just a position change. Otherwise, lymphedema will progress. Furthermore, elevation alone is impractical, promotes deconditioning, and alters lifestyle for prolonged periods.
Elastic garments
Elastic garments prove inadequate because they attempt to treat lymphedema with compression alone. Medically correct garments are engineered with thoughtful attention to high-quality textiles and offer gradient support, which promotes proximal flow. However, without precise tissue stimulation leading to improved lymphangioactivity (lymph-vessel pulsation), macromolecular wastes can’t be removed.
Interstitial pressure increases caused by compression garments impede further fluid accumulation. When these garments are removed, the spontaneous girth increase causes an imprecise fit, and the garment rapidly leads to a countertherapeutic effect. Furthermore, compression garments don’t combat the osmotic forces generated by ever-increasing interstitial wastes. Except in patients diagnosed with stage 0 or stage 1 lymphedema, disease progression involving metaplasia ensues. Although elastic compression garments are a cornerstone of long-term management, they shouldn’t be used as a stand-alone treatment.
Pneumatic compression pump
Formerly, the pneumatic compression pump (PCP) was considered the standard of care for lymphedema. However, when inflated, the pump doesn’t increase the frequency of lymph-vessel contraction or enhance lymph capillary absorption. What’s more, accelerated fibrosis development and rapid tissue refilling occur when a PCP is removed. Also, PCP use disregards the ipsilateral territory of the excised regional nodes, effectively dumping fluid from the leg into the trunk. A PCP is appropriate only when nothing else is available, as it may worsen the patient’s condition.
Surgery
Surgical approaches to treating lymphedema involve either excisional (debulking) or microsurgical techniques. The most extensive surgical technique, the radical Charles procedure, completely debulks all involved tissue down to the muscle fascia. Split-thickness grafts are then harvested from excised skin and donor sites, and applied to the fascia to achieve so-called limb reduction.
Most debulking procedures have been applied to lower-extremity lymphedema and offer poor cosmetic results. Less radical surgeries favor long incisions, preserving the skin but excising subcutaneous edematous portions to reduce girth. Although less cosmetically alarming, these procedures effectively amputate the subcutaneous space where lymph vessels reside. Other surgical approaches are beyond the scope of this article.
Generally, surgery isn’t a good approach for any patient, as it’s linked to significant morbidity, such as skin necrosis, infection, and sensory changes. In the future, less invasive procedures may be available that yield significant improvement without these adverse effects.
Diuretics
Although diuretics are prescribed appropriately to address water-rich edemas of venous origin, they disregard the fact that lymphedema is a protein-rich edema. Long-term, high-dose diuretic therapy leads to treatment-resistant limbs, similar to those that have received intensive pneumatic compression.
Benzopyrones
Benzopyrones such as warfarin decrease swelling by combating protein accumulation in fluid. Such drugs have undergone clinical trials abroad. Their mechanism is to promote macrophage migration into interstitial fluid, as well as subsequent proteolysis. Due to significant risk of liver damage or failure, benzopyrones haven’t been approved for treating lymphedema.
Complete decongestive therapy: The current treatment approach
Currently, the gold standard for lymphedema treatment is complete decongestive therapy (CDT). Michael Foeldi and Etelka Foeldi, who originated this method, discovered a unique symbiotic relationship among five distinct modalities that addresses the challenges of lymphedema treatment. In 1989, CDT was brought to the United States by Robert Lerner and has become the mainstay of lymphedema treatment here.
CDT is a two-phase approach involving an intensive clinical effort followed by a semi-intensive home-care program geared toward autonomous management, stabilization, and continual improvement. It involves manual lymph drainage (MLD), compression bandaging, exercise, skin and nail hygiene, and self-care education. (See Phases of complete decongestive therapy by clicking the PDF icon above.)
Manual lymph drainage
A type of soft-tissue mobilization, MLD provides skin traction, stimulating superficial lymph vessels and nodes. Lymph capillaries contain large inter-endothelial inlets called swinging tips, akin to overlapping shingles. Each overlapping cell is tethered to the interstitial matrix by anchoring filaments, so that fluid increases cause immediate distention and lymph inflow. Manual skin traction using MLD promotes greater lymph fluid uptake by stretching these filamentous structures, opening the swinging tips.
MLD also provides extrinsic stimulation of the lymphangion (the segment of a lymph vessel between a distal and proximal valve), drawing fluid into the system at the capillary level and promoting flow at the vessel level toward regional lymph nodes. Usually, these segments contract and relax in a rhythmic fashion six times per minute. MLD triples this output to 18 or 20 times per minute, greatly enhancing systemic transport.
MLD requires intensive daily treatment sessions to strengthen collateral flow as a pathway to circumventing surgical or developmental lymphatic disruption. Treatment strategies further recruit more deeply situated lymphatics such as the thoracic duct, as well as lumbar trunks that empty at the juncture of the internal jugular and subclavian veins to improve global uptake. MLD thus stimulates deeper vessel angioactivity to help drain the superficial vessels that drain toward them.
Compression bandaging
Compression bandaging provides tissue support after MLD to prevent reflux, slow new fluid formation, and mechanically soften fibrotic areas. Bandaging techniques provide a high working pressure to harness the muscle and joint pumps as a propellant for lymph while resisting retrograde flow created by gravity and centrifugal forces during movement. Pure cotton materials coupled with specialized padding create a soft, castlike environment, which confines swollen tissues without constriction. By relying on high working pressure and low resting pressures to decrease limb swelling, this strategy achieves greater control over intensity (level of compression/pressure exerted), with little to no soft-tissue injury or discomfort.
The patient wears this bulky inelastic complex after each MLD treatment until the next day’s session to ensure limb-volume reduction in a stable, linear fashion. Once a plateau is reached, tissue stabilization and self-care education are the goals of additional sessions.
Exercise
Exercise always must be done with adequate support to counteract fluid formation. During the intensive CDT phase, limbs are bandaged to provide complete around-the-clock containment. Gentle exercises encourage blood flow into the muscle; during muscle contraction, this creates a favorable internal pressure that effectively squeezes the subcutaneous space between the bandage wall and muscle. Because every bandage strives to provide a gradient of support, fluid tends to drain proximally to the bandage—in most cases, to the trunk.
Skin and nail hygiene
Without intact, well-hydrated skin, cellulitic infections occur in many lymphedema patients whose immune response has been diminished by regional lymphadenectomy or inherited deficiencies. To prevent infection caused by avoidable external events, patients receive clear guidelines to reinforce appropriate behavior. As most cellulitis results from resident skin pathogens (streptococci and staphylococci), maintaining a low skin pH helps control colonization. Ways to avoid recurrent infections include maintaining an acid mantle on the skin using low-pH-formulated lotions and avoiding injury from daily tasks that may scratch, puncture, burn, or abrade the skin. Patients should receive lists of self-care precautions at the time of treatment.
Self-care education
Because lymphedema is a chronic condition, patients must receive self-care education for daily management to avoid lymphedema destabilization, which can lead to tissue saturation and subsequent skin changes. Therapists must provide patients with appropriate self-care tools and knowledge to maintain adequate treatment results. Teaching topics include how to apply and remove compression garments and bandages and how to exercise safely, preserve skin integrity, monitor for infection, and respond appropriately to infection and significant changes in limb mobility.
An underrecognized and mistreated problem
Lymphedema remains an underrecognized and mistreated condition, even though CDT yields safe, reliable results. Early detection, accurate staging, proper diagnosis, and appropriate treatment can slow the inevitable progression of lymphedema. Wound care specialists should adapt wound therapy to address not just the wound but the edematous environment responsible for delayed wound resolution.
Selected references
Al-Niaimi F, Cox N. Cellulitis and lymphedema: a vicious cycle. J Lymphoedema. 2009;4:38-42.
Browse N, Burnand KG, Mortimer PS. Diseases of the Lymphatics. London: Hodder Arnold; 2003.
Casley-Smith JR, Casley-Smith JR. Modern Treatment for Lymphoedema. 5th ed. The Lymphoedema Association of Australia; 1997.
Cooper R, White R. Cutaneous infections in lymphoedema. J Lymphoedema. 2009:4:44-8.
Foeldi M. Foeldi’s Textbook of Lymphology: For Physicians and Lymphedema Therapists. 3rd ed. St. Louis, MO: Mosby; 2012.
International Society of Lymphology. The diagnosis and treatment of peripheral lymphedema. Consensus Document of the International Society of Lymphology. Lymphology. 2009 Jun;42(2):51-60.
Leduc A, Bastin R, Bourgeois P. Lymphatic reabsorption of proteins and pressotherapies. Progress in Lymphology XI. 1988:591-2.
National Lymphedema Network Medical Advisory Committee. Position Statement: Lymphedema Risk Reduction Practices. Revised May 2012. http://www.lymphnet.org/pdfDocs/nlnriskreduction.pdf. Accessed September 5, 2012.
Pappas CJ, O’Donnell TF Jr. Long-term results of compression treatment for lymphedema. J Vasc Surg. 1992 Oct;16(4):555-62.
Whittlinger H. Textbook of Dr. Vodder’s Manual Lymphatic Drainage. Vol 1. 7th ed. New York, NY: Thieme; 2003.
Steve Norton is cofounder of Lymphedema & Wound Care Education and executive director of the Norton School of Lymphatic Therapy in Matawan, New Jersey.
Lymphedema is characterized by regional immune dysfunction, distorted limb contours, and such skin changes as papillomas, hyperkeratosis, and increased girth. The condition may involve the limbs, face, neck, trunk, and external genitals; its effects may include psychological distress. For optimal patient management, clinicians must understand what causes lymphedema and how it’s diagnosed and treated.
This two-part series provides an overview of lymphedema. Part 1 covers etiology, pathology, and diagnosis. Part 2, which will appear in the November-
December issue, will focus on treatment.
Causes of lymphedema
Lymphedema occurs when protein-rich fluid accumulates in the interstitium due to impaired lymphatic function. Proteins, other macromolecular wastes, and water constitute lymphatic loads. These wastes rely on specially structured absorptive and transport structures in peripheral regions for their return to central circulation.
When lymph stasis prevails, inflammatory processes and lymphostatic fibrosis trigger tissue-density changes, further entrapping superficial vessels and accelerating mechanical insufficiency. (See Physiologic changes caused by lymphatic disruption by clicking the PDF icon above.)
Classifying lymphedema
Lymphedema can be primary or secondary. Primary lymphedema either is congenital (present at birth) or arises around puberty. In the vast majority of cases, it is associated with structural changes in the lymphatic system and isn’t associated with another disease or condition. Most structural changes (87%) manifest before age 35 and cause hypoplasia of vessels and nodes. Syndromes involving hyperplasia, node fibrosis, or aplasia also may occur, although they’re much less common. Dysplasia (either hypoplasia, hyperplasia, or aplasia) predisposes drainage regions to inadequate lymph collection, resulting in edema and secondary tissue changes, such as chronic inflammation and reactive fibrosis. Genetic variability in lymphatic constitution may explain why seemingly similar patients receiving the same surgical protocol have different lymphedema risks over time. Secondary lymphedema stems from a significant insult to lymphatic tissues, as from lymphadenectomy, radiation therapy, trauma, infection, or cancer. It commonly results from direct trauma to regional nodes or vessel structures. Slow degradation of lymphatic function also occurs when adjacent tissues (such as superficial and deep veins) become diseased, when cellulitis occurs, or when accumulations
of adipose or radiation fibrosis mechanical-ly disrupt drainage of skin lymphatics.
Lymphedema stages
Lymphedema progresses in stages, which involve secondary connective-tissue disease combined with disturbed fluid update and transport. These conditions cause a universal and classic clinical picture.
• Stage 0 (latency stage) is marked by reduced transport capacity and functional reserve. The patient has no visible or palpable edema, but has such subjective complaints as heaviness, tightness, and waterlogged sensations.
• In Stage 1 edema (reversible lymphedema), edema decreases with elevation. Pitting edema is present, but fibrosis is absent.
• During Stage 2 (spontaneously irreversible lymphedema), lymphedema doesn’t resolve entirely, although it may fluctuate. Pitting is more pronounced and fibrosis is present.
• Stage 3 (lymphostatic elephantiasis) is marked by dermal hardening, nonpitting edema, papillomas, hyperkeratosis, and in some cases, extreme girth.
Assessment and diagnosis
Diagnosing lymphedema can be challenging because edema may be associated with other diseases and disorders. For a summary of signs and symptoms, see Clinical findings in lymphedema by clicking the PDF icon above.
Discomfort and skin appearance
Lymphedema rarely causes pain because the skin accommodates gradual, insidious fluid accumulation. However, secondary orthopedic discomfort may result from increased weight of the affected limb due to deconditioning or decreased range of motion.
Because lymphedema usually progresses slowly, gravity and centrifugal forces pull fluids toward distal limb areas, causing an entrenched, stubborn pitting edema. Later, further valvular incompetence contributes to worsening distal edema in the fingers, toes, and dorsal regions of the hand and foot. Prominent lower-extremity structures, such as the malleolus, patella, tibia, anterior tibialis tendon, and Achilles tendon, become progressively less distinct. This creates a columnar limb appearance; the swollen limb has the same girth from distal to proximal aspects, unlike the natural cone shape of a normal limb.
Lymphatic failure doesn’t tax the venous system, so skin color remains normal. Blood supply remains patent, helping to prevent secondary ulcers.
Severity
Lymphedema severity correlates directly with such factors as onset of the condition and extent of cancer therapy, if given (number of nodes resected, number of positive nodes, and use of radiotherapy). Lymphedema may worsen with a greater number of infection episodes, weight gain, injury, diuretics, limb disuse, pneumatic compression therapy (when used for pure lymphedema), and ill-fitting compression garments. The single most important contributor to increasing lymphedema severity is lack of patient education, which can result in improper treatment or none at all.
Opportunistic infections
Lymphedema causes regional immune suppression and leads to an increase in opportunistic infections such as cellulitis. As skin integrity suffers, scaling and dryness allow resident skin pathogens (such as streptococci and staphylococci) to gain access through the defective skin barrier into protein-rich interstitial fluid, creating a medium favorable to bacterial colonization. Lymphocyte migration decreases, and dissected or irradiated nodal sites are slow to detect invaders. Furthermore, stagnant lymph promotes further delays in the immune response. Patients with opportunistic infections may exhibit high fever, local erythema, regional hypersensitivity or acute pain, flulike symptoms, and rapidly advancing “map-like” borders in the skin.
Differential diagnosis
Several methods can aid differential diagnosis. Clinical findings. Lymphedema can be diagnosed from patient history, physical examination, palpation, and inspection. Trauma to lymph nodes (each of which governs a distinct body region) decreases the transport capacity of lymph formed in that region, in turn causing local swelling (lymphedema). Trauma to the axillary or inguinal lymph nodes, which exist on both the left and right of the body and in both the upper and lower regions, predisposes these quadrants to swelling. Therefore, if lymph nodes on only one side are damaged, lymphedema occurs only on that side of the body. Using the universal characteristics cited above as a guide, while ruling out cancer recurrence, acute deep vein thrombosis, or plasma protein abnormalities, yields sufficient data to form a diagnosis. Imaging. Lymphography involves subcutaneous injection of a lymph vessel–
specific dye (Patent Blue V), followed by X-ray. Although it provides high-resolution images of lymphatic structures, this technique is invasive, painful, damaging to lymphatics, and potentially lethal—and therefore is no longer recommended.
Lymphangioscintigraphy (LAS) uses interdigital subcutaneous injection of protein-labeled radioisotopes, followed by
imaging at specific intervals to gather information about uptake and transport time. Images are hazy and false-negatives are common, so well-trained radiotherapists familiar with lymphology and lymphedema should administer and interpret the test. Also, experts don’t agree on standard criteria for LAS administration, so measures may not be similarly conclusive. Limb-measuring instruments and methods. Serial measurement of affected limb circumference using a standard garment tape measure is the most widely accessible approach. Intra-rater reliability is comparable to that of currently used tools; however, these methods can’t be used for early detection, for screening, or when various raters are used to assess the same patient. Circumferences are measured at four points and are considered positive if a distance of 2 cm or more separates the involved from uninvolved extremity in comparison. Water displacement techniques for limb-volume calculation, although accurate, are impractical in most clinical settings and rarely used.
Various devices have been used to obtain measurements. For instance, the Perometer® uses optoelectronic volumetry. By scanning the limb with infrared beams circumferentially, the device accurately records girth at 4-mm intervals along the limb length and transmits these measurements to a computer. The Perometer is used mainly in the research setting. Preoperative and postoperative measurements at intervals can detect lymphedema early.
Impedimed XCA® uses bioelectrical
impedance to calculate ratios of intracellular to extracellular fluid. A weak electrical current is passed through affected and unaffected limbs, allowing comparison of results. Impedance is lower in edematous tissue, supporting an accurate diagnosis.
Next step: Treatment
Once a diagnosis is made, the next step is treatment. Part 2 of this series covers lymphedema treatment.
Selected references
Foeldi M. Foeldi’s Textbook of Lymphology: For Physicians and Lymphedema Therapists. 3rd ed. St. Louis, MO: Mosby; 2012.
Kubik S, Manestar M. Anatomy of the lymph capillaries and precollectors of the skin. In: Bollinger A, Partsch H, Wolfe JHN, eds. The Initial Lymphatics. Stuttgart: Thieme-Verlag; 1985:66-74.
Lee B, Andrade M, Bergan J, et al. Diagnosis and treatment of primary lymphedema. Consensus document of the International Union of Phlebology (IUP)—2009. Int Angiol. 2010 Oct;29(5):454-70.
Lerner R. Chronic lymphedema. In: Prasad H, Olsen ER, Sumpio BE, Chang JB, eds. Textbook of Angiology. Springer; 2000.
Mayrovitz HN. Assessing lymphedema by tissue indentation force and local tissue water. Lymphology. 2009 June;42(2):88-98
Pecking AP, Alberini JL, Wartski M, et al. Relationship between lymphoscintigraphy and clinical findings in lower limb lymphedema (LO): toward a comprehensive staging. Lymphology. 2008 Mar;41(1):1-10.
Stanton AW, Northfield JW, Holroyd, B, et al. Validation of an optoelectronic volumeter (Perometer). Lymphology. 1997 June;30(2):77-97
Weissleder H, Schuchhardt C. Lymphedema: Diagnosis and Therapy. 4th ed. Viavital Verlag GmbH; 2007.
Steve Norton is cofounder of Lymphedema & Wound Care Education and executive director of the Norton School of Lymphatic Therapy in Matawan, New Jersey.
Looking for resources related to diabetes? See below.
National Diabetes Education Program
This excellent site for patients and providers is a partnership of the National Institutes of Health, the Centers for Disease Control and Prevention (CDC), and more than 200 public and private organizations.
Sections of the site include:
I Have Diabetes
Am I at Risk?
Health Care Professionals, Businesses & Schools
Partners & Community Organizations
An important feature is the ability to create a customized search to find publications particular to an individual’s situation—age, diabetes status, ethnicity/race, and language. You can also search by topic.
The Health Care Professionals section of the website contains clinical practice tools and patient education materials to help you identify and counsel patients with prediabetes and work with patients with diabetes.
Making Systems Changes for Better Diabetes Care is a National Diabetes Education Program website that provides information, links, resources, and tools to help healthcare professionals assess needs for system changes, develop plans, implement tools for action, and evaluate the change process.
Tools include links to clinical practice recommendations, patient education materials, algorithms, and risk assessments.
One section of particular interest is Diabetes Self-Management Education, which provides a four-step patient empowerment model.
