title: Reverse Shoulder Arthroplasty in Patients With Amputation or Paralysis of the Contralateral Upper Extremity (One-Arm Patients).
abstract: BACKGROUND
  Theoretically, patients with only one functional arm secondary to contralateral amputation or paralysis will subject their only functional upper extremity to increased loads. This could become an issue after reverse shoulder arthroplasty (RSA). However, there are no reported data on the implant survival or function for patients with a nonfunctional contralateral upper extremity.
  
  
  OBJECTIVE
  To report the outcomes of RSA in patients with contralateral upper extremity amputation or paralysis.
  
  
  METHODS
  Retrospective case series.
  
  
  METHODS
  Tertiary university hospital.
  
  
  METHODS
  All patients who underwent RSA between January 2004 and December 2013.
  
  
  METHODS
  Of 1335 RSA procedures performed, 5 patients had a minimum 2-year follow-up and nonfunctional contralateral upper extremity. There were 3 men and 2 women, with a mean (standard deviation) age and length of follow-up of 72.4 (7.5) years and 56.4 (24-132) months. Two of the patients had a contralateral upper extremity amputation, and the other 3 had contralateral upper extremity paralysis as a result of stroke, traumatic brain injury, and traumatic brachial plexus injury at birth.
  
  
  RESULTS
  Pain, range of motion, functional scores (Simple Shoulder Test, American Shoulder and Elbow Society and Quick-Disability of the Arm, Shoulder and Hand), satisfaction, complications/reoperations, and radiographic loosening.
  
  
  RESULTS
  RSA resulted in substantial improvement in pain (P = .008), forward flexion (P = .02), and external range of motion (P = .01). The mean (standard deviation) Simple Shoulder Test, American Shoulder and Elbow Society, and Quick-Disability of the Arm, Shoulder, and Hand scores were 9.8 (1.3), 82 (13), and 17.8 (13.4), respectively. The results were excellent in 3, satisfactory in 1, and unsatisfactory in 1 patient (due only to external rotation limited to 10°). Subjectively, all 5 patients felt greatly improved and stated they would undergo RSA again. There were no complications or reoperations. There were no shoulders with component loosening.
  
  
  CONCLUSIONS
  RSA seems to be a safe, effective, and successful surgical procedure for patients with a nonfunctional contralateral upper extremity. Studies with larger sample sizes and longer follow-up will hopefully validate the present findings.
  
  
  METHODS
  IV.
authors.affiliation: Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN(∗).
authors.forename: Eduard
authors.initials: E
authors.lastname: Alentorn-Geli
authors.affiliation: Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN(†).
authors.forename: Nathan R
authors.initials: NR
authors.lastname: Wanderman
authors.affiliation: Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN(‡).
authors.forename: Andrew T
authors.initials: AT
authors.lastname: Assenmacher
authors.affiliation: Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN(§).
authors.forename: Bassem T
authors.initials: BT
authors.lastname: Elhassan
authors.affiliation: Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN(¶).
authors.forename: Joaquín
authors.initials: J
authors.lastname: Sánchez-Sotelo
authors.affiliation: Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN(‖).
authors.forename: Robert H
authors.initials: RH
authors.lastname: Cofield
authors.affiliation: Department of Orthopedic Surgery, Mayo Clinic, 200 First Street SW, Rochester, MN 55905(#). Electronic address: Sperling.John@mayo.edu.
authors.forename: John W
authors.initials: JW
authors.lastname: Sperling
mesh_terms: D000203:Activities of Daily Living; D000368:Aged; D000369:Aged, 80 and over; D000674:Amputees; D000072228:Arthroplasty, Replacement, Shoulder / Q000379:methods*; D015331:Cohort Studies; D004185:Disability Evaluation; D005260:Female; D006785:Hospitals, University; D006801:Humans; D008297:Male; D010243:Paralysis / Q000503:physiopathology / Q000601:surgery; D061214:Patient Safety / Q000706:statistics & numerical data; D016059:Range of Motion, Articular / Q000502:physiology*; D012189:Retrospective Studies; D062606:Tertiary Care Centers; D016896:Treatment Outcome; D034941:Upper Extremity / Q000503:physiopathology / Q000601:surgery*