What is the nurse's role in monitoring a client's skin status when using the Braden Scale?

A. Consistent with dehydration: In burn patients, an increased heart rate or tachycardia is a compensatory mechanism for hypovolemia. As fluid shifts from the intravascular space to the interstitial space due to increased capillary permeability, the circulating blood volume decreases. The heart compensates by increasing its rate to maintain cardiac output and tissue perfusion. This systemic response is a hallmark sign of the fluid volume deficit that occurs during the emergent phase of burn injuries.

B. Consistent with dehydration: Decreased urine output, or oliguria, occurs when the kidneys receive inadequate perfusion due to low intravascular volume and decreased cardiac output. In the context of a burn injury, extensive fluid loss through damaged skin and third-spacing leads to a drop in glomerular filtration rate. Monitoring urine output is a critical metric for assessing the adequacy of fluid resuscitation, with the goal being to reverse this sign of severe systemic dehydration.

C. Consistent with dehydration: An elevated blood urea nitrogen level reflects hemoconcentration and reduced renal blood flow. The normal range for blood urea nitrogen is 7 to 20 mg/dL. In a dehydrated burn patient, the lack of sufficient fluid causes the concentration of urea in the blood to rise as the kidneys struggle to excrete metabolic waste. This elevation indicates that the patient requires aggressive fluid replacement to restore osmotic balance and ensure proper renal clearance of toxins.

D. Consistent with fluid overload: A decreased hematocrit level often indicates hemodilution, which can occur during the state of fluid overload. While the hematocrit typically rises initially in burn patients due to plasma loss and hemoconcentration, a subsequent drop below the normal range of 42 to 52 percent for men or 37 to 47 percent for women may suggest excessive fluid administration. This occurs because the increased volume of administered fluids dilutes the existing red blood cell mass.

Hemiarthroplasty is specifically indicated for femoral neck fractures where the acetabulum remains healthy and intact. This procedure involves replacing the femoral head and neck while leaving the natural hip socket alone. By replacing only the damaged femoral component, surgeons minimize the complexity of the operation and preserve the patient's existing bone structure in the pelvis. It is a common choice for elderly patients with displaced fractures who require early mobilization to avoid complications.

Choice B rationale

Joint disease affecting the entire hip joint, such as advanced osteoarthritis or rheumatoid arthritis, typically requires a total hip arthroplasty rather than a hemiarthroplasty. A hemiarthroplasty only addresses one side of the joint, so it would fail to alleviate pain originating from a diseased or eroded acetabulum. Therefore, this approach is not recommended when the whole joint is compromised. Total replacement ensures that both articulating surfaces are smooth and functional to reduce chronic pain.

Choice C rationale

Fusing the bones of a fractured joint is a procedure known as arthrodesis, which is entirely different from a hemiarthroplasty. Arthrodesis results in a complete loss of joint mobility to provide stability and pain relief, whereas hemiarthroplasty aims to restore movement by providing a prosthetic articular surface. In the context of a femoral neck fracture, maintaining mobility is usually the primary goal to ensure the patient can walk and perform daily activities after surgery.

Choice D rationale

Replacing both the hip socket and the femoral head describes a total hip arthroplasty, not a hemiarthroplasty. While a total hip replacement provides a more durable solution for active patients or those with existing arthritis, hemiarthroplasty is preferred for those with isolated femoral neck damage. Performing a full replacement when only the femur is fractured would involve unnecessary removal of healthy pelvic bone and increase the risk of surgical complications and longer operative times.