Situation: A nurse works in the pediatric outpatient department, emergency room, and pediatric ward of a district hospital. A 4-year-old boy with severe hemophilia A fell while playing an hour ago. His right knee is warm, swollen, and painful, and he refuses to bend it. What should the nurse do FIRST?

A joint bleed in hemophilia is treated by replacing the missing clotting factor as early as possible, which stops the bleeding. Rest, ice, compression, and elevation follow as supportive measures, and range-of-motion exercise begins only after the bleeding is controlled.

Clinical context

A 4-year-old boy with severe hemophilia A presents one hour after a fall with a warm, swollen, painful right knee and refusal to bend it. These findings describe an acute hemarthrosis, or bleeding into the joint space. In severe hemophilia A, factor VIII activity is less than 1%, so even minor trauma can trigger spontaneous or traumatic joint bleeding. The knee is a classic target joint because it bears weight and undergoes frequent mechanical stress.

The immediate priority in any acute hemophilic joint bleed is replacement of the missing clotting factor to stop the hemorrhage at its source. All other measures are supportive and secondary. Delaying factor administration allows blood to accumulate inside the joint capsule, which increases intra-articular pressure, damages cartilage, and sets the stage for chronic synovitis and target joint formation.

Why factor VIII concentrate comes first

Hemarthrosis is the hallmark bleeding event in severe hemophilia and the major driver of long-term disability and reduced quality of life in patients with factor VIII or factor IX deficiency ^[1]. The pathophysiologic sequence is straightforward: trauma ruptures small synovial vessels, blood leaks into the joint space, and without adequate factor VIII activity the normal coagulation cascade cannot form a stable fibrin clot. The joint then fills with blood, producing the classic signs of warmth, swelling, pain, and refusal to move the affected limb.

Early factor replacement shortens the duration of bleeding, limits the volume of blood trapped in the joint, and reduces the risk of irreversible cartilage injury. The same principle underlies continuous prophylaxis, in which regular infusion of factor concentrates at fixed intervals prevents hemorrhages and protects against the development of target joints ^[2]. In an acute bleed, the goal is to raise factor VIII activity to a hemostatic level as quickly as possible, ideally within the first hours after symptom onset.

Key point! The order of interventions matters. Factor replacement is the definitive treatment; ice, elevation, compression, and rest are adjuncts that follow, not substitutes for, clotting factor administration.

Why the other options are not first

Option	Why it is not the first action
1. Gentle range-of-motion exercises	Moving a bleeding joint before hemostasis is achieved can mechanically disrupt any forming clot, worsen bleeding, and increase pain. Range-of-motion activity begins only after the bleeding is controlled and the acute inflammatory phase has subsided.
2. Ice pack and elevation	These are appropriate supportive measures that promote vasoconstriction and reduce swelling, but they do not stop the underlying bleeding. They should be started after or alongside factor replacement, never instead of it.
3. Ibuprofen	Ibuprofen and other NSAIDs inhibit platelet function and can worsen bleeding in a child with hemophilia. Acetaminophen is the preferred analgesic for pain because it does not impair hemostasis.

Watch out! NSAIDs are generally contraindicated in hemophilia because they interfere with platelet aggregation and increase bleeding risk. Pain control in hemarthrosis should rely on acetaminophen or other non-NSAID options.

Clinical reasoning for the licensure exam

In pediatric hemophilia, bleeding sites vary with age. While delivery-associated intracranial hemorrhage, circumcision, and venipuncture bleeding are common in newborns, joint disease and head trauma become more prominent in older children and adolescents . A 4-year-old boy with a knee injury therefore fits the expected pattern of joint bleeding in this age group.

The nurse’s first action is to administer factor VIII concentrate as ordered. This is a nursing priority because the nurse is often the one who prepares and infuses the factor product, monitors for allergic reactions, and documents the response. In many settings, factor is given intravenously as soon as an acute bleed is suspected, even before imaging confirms the diagnosis, because the clinical presentation is sufficiently characteristic .

The sequence in acute hemarthrosis is: replace the missing factor first, then apply rest, ice, compression, and elevation, and begin range-of-motion exercises only after bleeding has stopped. This sequence reflects the underlying hemostatic priority and is consistently tested in nursing licensure examinations.

Musculoskeletal ultrasound can facilitate early detection of acute bleeds and joint disease in the clinic, enabling more rapid bleed resolution and treatment planning . However, ultrasound is a diagnostic adjunct; it does not replace the immediate need for factor replacement when the clinical picture is clear.

Summary of the priority action

For a child with severe hemophilia A and an acute knee hemarthrosis, the first nursing action is to give factor VIII concentrate as ordered. This directly addresses the coagulation defect and stops ongoing bleeding into the joint. Ice, elevation, and rest are supportive measures that follow factor administration, while range-of-motion exercises are delayed until hemostasis is achieved and the acute symptoms resolve. NSAIDs such as ibuprofen are avoided because they increase bleeding risk.