Why There Is Delayed Wound Healing in Older People - A Discussion

Introduction

The healing of wounds is a biological process that comprises a series of changes like inflammation, proliferation, angiogenesis, epidermal regrowth, wound healing or contraction, and the remodeling phase. Aging has a higher impact on these phases of wound healing, resulting in slow or delayed healing of the wounds. The article describes how wound healing is delayed with aging, how it influences the quality of life of older age groups, and what current novel approaches or therapies are advocated to promote the wound healing process in older age groups.

What Is the Basic Science Behind Wound Healing?

The healing of wounds undergoes a series of pathophysiological events for the complete repair, regeneration, and remodeling of chronic wounds. Different phases or changes that occur during the beginning to the end of the wound healing process are:

• Inflammatory Phase: In this phase, neutrophil and monocyte infiltration occur along with lymphocytes.

• Proliferation Phase: In this phase, the formation of granulocyte tissue and collagen fibers occurs with the proliferation of basal cells.

• Angiogenesis: Growth of blood vessels.

• Epidermal Regrowth: It stimulates endothelial growth factors (epidermal growth factor) and keratinocytes.

• Wound Contraction: In this phase, the wound contracts to reduce the size of the defects (it occurs in response to myofibroblasts).

• Repair and Remodeling Phase: This phase is also known as the “maturation phase.” In this phase, cellular connective tissue forms, the new epithelial layer strengthens, and the wound contracts.

A protein named MMP or matrix metalloproteinases is involved in each of these phases and plays a crucial role in wound healing from the beginning to the end of the wound healing process.

How to Spot an Infection?

Any skin opening has the potential to become infected, so it is critical to recognize the warning signs and frequently check for them. If you observe any of the following symptoms, get in touch with a physician or other healthcare provider immediately.

• Elevated swelling and redness.

• Severe discomfort in the limb affected by the wound or close to it.

• The gray liquid is coming out of the cut.

• Adult fever greater than 100.4 Ferehnite.

• Red striations close to the incision.

Does Aging Impact the Wound Healing Process?

Healing of wounds is a slowly progressing process that is important for the complete repair and regeneration of the wounds. However, the efficiency of wound healing reduces drastically with age, resulting in incomplete repair and remodeling of chronic wounds, thereby impacting older people's quality of life. Furthermore, the phases of wound healing reduce with age because of the hampering of different phases involved in the wound healing process, resulting in a reduction in the overall healing process. A few changes or disturbances that occur in the normal series or events of the wound healing phases that result in delayed wound healing are:

• Reduction in the Inflammatory Response: An increase in the levels of cytokines (proinflammatory) such as interleukin-6 (IL-6) and alpha tumor necrosis factor reduces the growth factors required for the efficient wound healing process.

• Reduction in the proliferative process of healing.

• Hampering the remodeling process to some extent.

• Increased expression of matrix metalloproteinases delays the healing process.

• Reduction in the expression of beta transforming growth factor.

• Weak cellular response.

• Increase elastase or collagenase expression.

• Reduced microcirculation (arteries, veins, and capillaries) in the skin of older age people is another cause of delay in wound healing.

Why Do Older Adults Heal More Slowly?

The elderly are more susceptible to complications during all stages of the wound-healing process, prolonging the recovery time. Indeed, any disruption to the wound healing phases is considered to postpone the healing process.

1. Diabetes and Age-Related Disorders: In addition to the fact that wounds heal more slowly as people age, numerous chronic wounds, including pressure ulcers, diabetic or venous ulcers, and arterial insufficiency (any condition that slows and stops blood flow to the arteries), have also been linked to illnesses that frequently affect the elderly. Furthermore, older persons are more likely to undergo surgery, which raises the possibility of wound complications.

2. Aging Skin and Pressure Wounds: One of the most evident indications of aging is changes to the skin, which can directly affect wound healing. Older folks are thought to require up to four times longer to heal from skin injuries than younger people. The impact of aging on the body's cells is partially to blame. Cell division is slower in many elderly patients. Additionally, producing fat cells beneath the skin is more challenging for the body. One of the reasons why elderly people have thin skin and are more prone to wounds and injuries is because of these impacts.

3. Poor Nutrition and Wound Healing: Poor diet and inactivity can also affect wound healing. Poor nutrition in the elderly increases the risk of bone fractures, increases the likelihood of prolonged hospital admissions, and decreases the effectiveness of treatment. This is especially important for senior people, who are more likely to suffer from malnutrition and heal more slowly, even though everyone needs energy to heal.

What Are the Additional Wound Care Tips For Seniors?

• Wash Hands: Hands should be washed before beginning any wound treatment, whether for yourself or someone else.

• Apply Pressure: The next step is to apply light pressure to stop bleeding. A fresh cloth should absorb any blood. Do this for a few minutes before the bleeding stops.

• Rinse: As opposed to cleaning, eliminate any remaining dirt or debris from the wound. This will avoid infection. Use flowing water to rinse the cut or cover it with fresh water. Do not use antiseptic.

• Clean: Once the wound is clear of debris, cleanse the area surrounding the injury with soap. Avoid soap and hydrogen peroxide on wounds. Wipe the area dry; pat it dry.

• Remove Debris: After cleaning and washing the wound, look for any remaining filth. Use tweezers to remove anything left over.

• Use Ointment: Neosporin and Polysporin ointments help moisten the wound and prevent infection.

• Apply a Bandage: If the wound is more extensive than a cut or scrape, protection is desired. Apply a bandage to stop blood and scab fragments from getting on your clothing. Long-term use of bandages can help avoid scabs and scarring and help prevent the growth of microorganisms.

• Replace the Bandages: Be careful to apply fresh bandages once a day or more. This will guarantee that the wound remains clean even in the event of dirt. Never forget to wash your hands before, after, and between dressing changes. With every new bandage, use antibiotic ointment and refrain from touching the wound.

What Changes in the Body Affect the Wound Healing Mechanism?

The body undergoes various aging changes that hamper and slow the wound-healing process. A few changes in the body that occur, resulting in delayed wound healing are:

• Reduction in the overall energy with aging.

• The nutritional deficit in adults.

• Degeneration of neurons.

• Homeostatic (capability to maintain static balance within internal body organs) imbalance with an age-like increase in proinflammatory cytokines and reduction in antioxidants.

• Other intrinsic factors include skin changes with age, dermis thinning, and keratinocyte proliferation and migration reduction.

What Are the Current Novel Approaches and Therapeutic Techniques Developed for Managing Delayed Wound Healing in the Elderly?

According to current research and the trials, different therapeutic approaches are developed for overcoming the delayed wound healing process, such as:

• Tissue-Engineered Products: Clinical trials have shown that cellular or tissue-engineered products, such as topical wound sprays, are efficacious in wound healing in patients with venous leg ulcers.

• Hyperbaric Oxygen (HBO) Therapy: According to clinical research, hyperbaric oxygen therapy helps to combat hypervascularity and hypocellularity, thereby improving the microcirculation or vascularity (hypervascularity) to the area of the wound, improving the wound healing process. It also helps improve oxygen content in the area of wounds, thereby promoting wound healing. Hyperbaric oxygen therapy mostly targets pluripotent stem cells. These stem cells help repair and regenerate the wound.

• Negative Pressure Wound Therapy: Few studies support the use of negative pressure wound therapy to improve wound healing. However, a few studies indicate improved wound contraction in older age groups. Furthermore, research and clinical trials are needed to completely understand the importance of negative pressure wound therapy in improving adult wound healing.

• Electrical Stimulation Therapy: A few studies and clinical trials suggest that electrotherapy helps promote wound healing by increasing the vascular supply (blood supply) in the wound area. It also helps to improve blood circulation to the graft or flaps covering the wound and reduces the risk of wound necrosis.

• Low-Frequency Ultrasound: According to current research, a low-frequency ultrasound (22 to 35 kHz) helps reduce the infection in the area of wounds and promotes the healing process of the wound.

• Nutritional Care: Nutrition is one of the factors resulting in compromised wound healing in older patients. As with aging, diet and nutrition are affected due to various causes, like indigestion or underlying systemic illness. So, a complete nutritional and balanced diet full of effective vitamins like C and K improves wound healing.

Conclusion

Delays in wound healing have significantly impacted older people's quality of life. Different therapeutic techniques and novel approaches have been developed to improve the wound-healing process in the elderly, especially among those with underlying systemic diseases like diabetes and metabolic disorders. However, further clinical trials and research are yet to be developed and implemented to overcome the challenges faced by healthcare professionals and patients during the wound healing process in the older age group.