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Growth Hormone Deficiency | 마이메르시 MyMerci
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Growth Hormone Deficiency

NCLEX Review Guide: Growth Hormone Deficiency in Children

Pathophysiology & Assessment

Growth Hormone Deficiency Overview

  • Growth hormone deficiency (GHD) occurs when the pituitary gland fails to produce adequate growth hormone, resulting in significantly delayed linear growth and short stature.
  • Primary causes include pituitary tumors, cranial irradiation, head trauma, and genetic mutations affecting the hypothalamic-pituitary axis.
  • Children typically present with height below the 3rd percentile for age and growth velocity less than 5 cm/year after age 3.

Memory Aid: "SHORT"

  • Stature below 3rd percentile
  • Hypoglycemia episodes
  • Obesity (central)
  • Retarded bone age
  • Teeth delayed eruption

Key Assessment Findings

  • Normal body proportions with delayed growth velocity
  • Delayed bone age (2+ years behind chronological age)
  • Delayed sexual maturation in adolescents
  • Hypoglycemia, especially in infants

Diagnostic Testing & Management

Diagnostic Procedures

  • Growth hormone stimulation tests using arginine, clonidine, or insulin are the gold standard for diagnosis, with peak GH levels <10 ng/mL indicating deficiency.
  • Bone age X-rays of the left hand and wrist reveal delayed skeletal maturation compared to chronological age.
  • MRI of the brain evaluates pituitary structure and identifies potential tumors or anatomical abnormalities.

Clinical Scenario

A 8-year-old child presents with height at 1st percentile, appears younger than stated age, and has central obesity. Parents report normal birth weight but progressive growth delay since age 2. What is the priority nursing action?

Answer: Monitor for hypoglycemia and ensure frequent meals, as GH deficiency can cause severe hypoglycemic episodes.

Treatment Protocol

  1. Initiate recombinant human growth hormone (somatropin) therapy via daily subcutaneous injections
  2. Rotate injection sites to prevent lipodystrophy and ensure proper absorption
  3. Monitor growth velocity every 3-6 months with height and weight measurements
  4. Assess for side effects including joint pain, headaches, and glucose intolerance
  5. Continue treatment until near-final adult height or growth velocity <2 cm/year

Key Nursing Interventions

  • Teach proper injection technique and site rotation
  • Monitor blood glucose levels regularly
  • Assess for signs of increased intracranial pressure
  • Provide emotional support for body image concerns

Commonly Confused Concepts

Growth Hormone Deficiency Constitutional Growth Delay Familial Short Stature
Abnormal GH stimulation test Normal GH levels Normal GH levels
Delayed bone age (2+ years) Delayed bone age (matches height age) Normal bone age
Responds to GH therapy Eventually catches up without treatment Limited response to GH therapy
May have hypoglycemia No metabolic issues No metabolic issues

Critical Alert

Never delay treatment for suspected GH deficiency - early intervention is crucial for achieving optimal adult height and preventing psychosocial complications.

Study Tips & Quick Checks

NCLEX Success Strategy

  • Remember: GH deficiency = SHORT stature with NORMAL proportions
  • Key numbers: <3rd percentile height, <5 cm/year growth, 2+ years delayed bone age
  • Treatment: Daily SQ injections with site rotation
  • Monitor: Growth velocity, blood glucose, signs of increased ICP

Common NCLEX Pitfalls

  • Don't confuse with Turner syndrome (has dysmorphic features)
  • Remember GH deficiency can cause hypoglycemia, not hyperglycemia initially
  • Treatment continues until growth velocity slows, not just until puberty
  • Psychosocial support is as important as medical treatment

Quick Self-Assessment

I can identify the classic presentation of GH deficiency
I understand the diagnostic criteria and testing procedures
I know the proper administration and monitoring of GH therapy
I can differentiate GH deficiency from other growth disorders
I understand the psychosocial implications and nursing support needed

Remember: You're preparing to be an advocate for children's optimal growth and development. Every concept you master brings you closer to providing excellent pediatric nursing care. Stay focused and believe in your ability to succeed on the NCLEX!

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