Faculty

Back to Index
Robert M Kay, MD
Professor of Orthopaedic Surgery (Clinical Scholar)
Pediatric Orthopaedic Surgery
CHL Mail Stop 69 Off Campus Los Angeles
+1 323 361 4658

Overview

Dr. Kay received his undergraduate degree from Harvard College and his medical degree from The Johns Hopkins University School of Medicine. He completed his residency in orthopaedic surgery at University of California Los Angeles and a fellowship in pediatric orthopaedics at Atlanta Scottish Rite Childrens Medical Center. Dr. Kay has published over 70 peer-reviewed articles and numerous book chapters and is active in several organizations including the American Academy of Orthopaedic Surgeons, Pediatric Orthopaedic Society of North America, American Academy of Cerebral Palsy and Developmental Medicine and the Gait and Clinical Movement Analysis Society. Dr. Kay has been the director of the Motion Analysis Laboratory since 1997.

Publications

Seehausen DA, Harris LR, Kay RM, Pace JL. Accessory Navicular is Associated With Wider and More Prominent Navicular Bone in Pediatric Patients by Radiographic Measurement. J Pediatr Orthop. 2016 Jul-Aug; 36(5):521-5. View in: PubMed

Rethlefsen SA, Nguyen DT, Wren TA, Milewski MD, Kay RM. Knee Pain and Patellofemoral Symptoms in Patients With Cerebral Palsy. J Pediatr Orthop. 2015 Jul-Aug; 35(5):519-22. View in: PubMed

Ryan DD, Lightdale-Miric NR, Joiner ER, Wren TA, Spragg L, Heffernan MJ, Kay RM, Skaggs DL. Variability of the Anterior Humeral Line in Normal Pediatric Elbows. J Pediatr Orthop. 2015 May 16. View in: PubMed

Seehausen DA, Kay RM, Ryan DD, Skaggs DL. Foam padding in casts accommodates soft tissue swelling and provides circumferential strength after fixation of supracondylar humerus fractures. J Pediatr Orthop. 2015 Jan; 35(1):24-7. View in: PubMed

Lee C, Lightdale-Miric N, Chang E, Kay R. Silent compartment syndrome in children: a report of five cases. J Pediatr Orthop B. 2014 Sep; 23(5):467-71. View in: PubMed

Yu S, Rethlefsen SA, Wren TA, Kay RM. Long-term Ambulatory Change After Lower Extremity Orthopaedic Surgery in Children With Cerebral Palsy: A Retrospective Review. J Pediatr Orthop. 2014 Jun 24. View in: PubMed

Ramirez RN, Ryan DD, Williams J, Wren TA, Ibrahim D, Weiss JM, Kay RM, Lightdale-Miric N, Skaggs DL. A Line Drawn Along the Radial Shaft Misses the Capitellum in 16% of Radiographs of Normal Elbows. J Pediatr Orthop. 2014 Apr 29. View in: PubMed

Wren TA, Lening C, Rethlefsen SA, Kay RM. Impact of gait analysis on correction of excessive hip internal rotation in ambulatory children with cerebral palsy: a randomized controlled trial. Dev Med Child Neurol. 2013 Oct; 55(10):919-25. View in: PubMed

Rethlefsen SA, Yasmeh S, Wren TA, Kay RM. Repeat hamstring lengthening for crouch gait in children with cerebral palsy. J Pediatr Orthop. 2013 Jul-Aug; 33(5):501-4. View in: PubMed

Rethlefsen SA, Kay RM. Transverse plane gait problems in children with cerebral palsy. J Pediatr Orthop. 2013 Jun; 33(4):422-30. View in: PubMed

Wren TA, Otsuka NY, Bowen RE, Scaduto AA, Chan LS, Dennis SW, Rethlefsen SA, Healy BS, Hara R, Sheng M, Kay RM. Outcomes of lower extremity orthopedic surgery in ambulatory children with cerebral palsy with and without gait analysis: results of a randomized controlled trial. Gait Posture. 2013 Jun; 38(2):236-41. View in: PubMed

Wren TA, Elihu KJ, Mansour S, Rethlefsen SA, Ryan DD, Smith ML, Kay RM. Differences in implementation of gait analysis recommendations based on affiliation with a gait laboratory. Gait Posture. 2013 Feb; 37(2):206-9. View in: PubMed

Sabatini CS, Skaggs KF, Kay RM, Skaggs DL. Orthopedic Surgeons are Less Likely to See Children Now for Fracture Care Compared with 10 Years Ago. J Pediatr. 2012 Mar; 160(3):505-7. View in: PubMed

Huh K, Rethlefsen SA, Wren TA, Kay RM. Surgical Management of Hip Subluxation and Dislocation in Children With Cerebral Palsy: Isolated VDRO or Combined Surgery? J Pediatr Orthop. 2011 Dec; 31(8):858-63. View in: PubMed

Kay RM, Leathers M, Directo MP, Myung K, Skaggs DL. Perioperative ketorolac use in children undergoing lower extremity osteotomies. J Pediatr Orthop. 2011 Oct-Nov; 31(7):783-6. View in: PubMed

Aisen ML, Kerkovich D, Mast J, Mulroy S, Wren TA, Kay RM, Rethlefsen SA. Cerebral palsy: clinical care and neurological rehabilitation. Lancet Neurol. 2011 Sep; 10(9):844-52. View in: PubMed

Skaggs DL, Glassman D, Weiss JM, Kay RM. A new surgical technique for the treatment of supracondylar humerus fracture malunions in children. J Child Orthop. 2011 Aug; 5(4):305-12. View in: PubMed

Wren TA, Otsuka NY, Bowen RE, Scaduto AA, Chan LS, Sheng M, Hara R, Kay RM. Influence of gait analysis on decision-making for lower extremity orthopaedic surgery: Baseline data from a randomized controlled trial. Gait Posture. 2011 Jul; 34(3):364-9. View in: PubMed

Al Wren T, Lee DC, Kay RM, Dorey FJ, Gilsanz V. Bone density and size in ambulatory children with cerebral palsy. Dev Med Child Neurol. 2011 Feb; 53(2):137-41. View in: PubMed

Ryan DD, Kay RM. Orthopaedic issues in children and adolescents with central nervous system tumors. J Pediatr Rehabil Med. 2011; 4(1):71-8. View in: PubMed

Wren TA, Lee DC, Hara R, Rethlefsen SA, Kay RM, Dorey FJ, Gilsanz V. Effect of high-frequency, low-magnitude vibration on bone and muscle in children with cerebral palsy. J Pediatr Orthop. 2010 Oct-Nov; 30(7):732-8. View in: PubMed

Rethlefsen SA, Ryan DD, Kay RM. Classification systems in cerebral palsy. Orthop Clin North Am. 2010 Oct; 41(4):457-67. View in: PubMed

Kay RM, Directo MP, Leathers M, Myung K, Skaggs DL. Complications of ketorolac use in children undergoing operative fracture care. J Pediatr Orthop. 2010 Oct-Nov; 30(7):655-8. View in: PubMed

Rethlefsen SA, Lening C, Wren TA, Kay RM. Excessive hip flexion during gait in patients with static encephalopathy: an examination of contributing factors. J Pediatr Orthop. 2010 Sep; 30(6):562-7. View in: PubMed

Wren TA, Cheatwood AP, Rethlefsen SA, Hara R, Perez FJ, Kay RM. Achilles tendon length and medial gastrocnemius architecture in children with cerebral palsy and equinus gait. J Pediatr Orthop. 2010 Jul-Aug; 30(5):479-84. View in: PubMed

Huh K, Rethlefsen SA, Wren TA, Kay RM. Development of calcaneal gait without prior triceps surae lengthening: an examination of predictive factors. J Pediatr Orthop. 2010 Apr-May; 30(3):240-3. View in: PubMed

Bernthal NM, Gamradt SC, Kay RM, Wren TA, Cuomo AV, Reid J, Bales J, Otsuka NY. Static and dynamic gait parameters before and after multilevel soft tissue surgery in ambulating children with cerebral palsy. J Pediatr Orthop. 2010 Mar; 30(2):174-9. View in: PubMed

Weiss JM, Kay RM, Waters P, Yang S, Skaggs DL. Distal humerus osteotomy for supracondylar fracture malunion in children: a study of perioperative complications. Am J Orthop (Belle Mead NJ). 2010 Jan; 39(1):22-5. View in: PubMed

Karlen JW, Skaggs DL, Ramachandran M, Kay RM. The Dega osteotomy: a versatile osteotomy in the treatment of developmental and neuromuscular hip pathology. J Pediatr Orthop. 2009 Oct-Nov; 29(7):676-82. View in: PubMed

Weiss JM, Graves S, Yang S, Mendelsohn E, Kay RM, Skaggs DL. A new classification system predictive of complications in surgically treated pediatric humeral lateral condyle fractures. J Pediatr Orthop. 2009 Sep; 29(6):602-5. View in: PubMed

Wren TA, Kalisvaart MM, Ghatan CE, Rethlefsen SA, Hara R, Sheng M, Chan LS, Kay RM. Effects of preoperative gait analysis on costs and amount of surgery. J Pediatr Orthop. 2009 Sep; 29(6):558-63. View in: PubMed

Ogawa BK, Skaggs DL, Kay RM. Malignant peripheral nerve sheath tumor of the lumbar spine. Am J Orthop (Belle Mead NJ). 2009 May; 38(5):E89-92. View in: PubMed

Sankar WN, Rethlefsen SA, Weiss J, Kay RM. The recurrent clubfoot: can gait analysis help us make better preoperative decisions? Clin Orthop Relat Res. 2009 May; 467(5):1214-22. View in: PubMed

Rethlefsen SA, Kam G, Wren TA, Kay RM. Predictors of outcome of distal rectus femoris transfer surgery in ambulatory children with cerebral palsy. J Pediatr Orthop B. 2009 Mar; 18(2):58-62. View in: PubMed

Weiss JM, Choi P, Ghatan C, Skaggs DL, Kay RM. Complications with flexible nailing of femur fractures more than double with child obesity and weight >50 kg. J Child Orthop. 2009 Feb; 3(1):53-8. View in: PubMed

Wood HM, Kay R, Angermeier KW, Ross JH. Timing of the presentation of urethrocutaneous fistulas after hypospadias repair in pediatric patients. J Urol. 2008 Oct; 180(4 Suppl):1753-6. View in: PubMed

Sankar WN, Chen J, Kay RM, Skaggs DL. Incidence of occult fracture in children with acute ankle injuries. J Pediatr Orthop. 2008 Jul-Aug; 28(5):500-1. View in: PubMed

Rethlefsen SA, Kay RM. "Kinematic and kinetic evaluation of the ankle joint before and after tendo Achilles lengthening in patients with spastic diplegia". J Pediatr Orthop. 2008 Apr-May; 28(3):392. View in: PubMed

Wren TA, Sheng M, Bowen RE, Scaduto AA, Kay RM, Otsuka NY, Hara R, Chan LS. Concurrent and discriminant validity of Spanish language instruments for measuring functional health status. J Pediatr Orthop. 2008 Mar; 28(2):199-212. View in: PubMed

Skaggs DL, Sankar WN, Albrektson J, Vaishnav S, Choi PD, Kay RM. How safe is the operative treatment of Gartland type 2 supracondylar humerus fractures in children? J Pediatr Orthop. 2008 Mar; 28(2):139-41. View in: PubMed

Albrektson J, Kay RM, Tolo VT, Skaggs DL. Abduction pillow immobilization following hip surgery: a welcome alternative for selected patients. J Child Orthop. 2007 Nov; 1(5):299-305. View in: PubMed

Wren TA, Do KP, Hara R, Dorey FJ, Kay RM, Otsuka NY. Gillette Gait Index as a gait analysis summary measure: comparison with qualitative visual assessments of overall gait. J Pediatr Orthop. 2007 Oct-Nov; 27(7):765-8. View in: PubMed

Choi PD, Rose RK, Kay RM, Skaggs DL. Compartment syndrome of the thigh in an infant: a case report. J Orthop Trauma. 2007 Sep; 21(8):587-90. View in: PubMed

Wren TA, Sheng M, Hara R, Otsuka NY, Bowen RE, Scaduto AA, Kay RM, Chan LS. Agreement among three instruments for measuring functional health status and quality of life in pediatric orthopaedics. J Pediatr Orthop. 2007 Mar; 27(2):233-40. View in: PubMed

Ramachandran M, Kay RM, Skaggs DL. Treatment of hip dislocation in Kabuki syndrome: a report of three hips in two patients. J Pediatr Orthop. 2007 Jan-Feb; 27(1):37-40. View in: PubMed

Skaggs DL, Oda JE, Lerman L, McGoldrick E, Rice C, Weiss J, Kay RM. Insurance status and delay in orthotic treatment in children. J Pediatr Orthop. 2007 Jan-Feb; 27(1):94-7. View in: PubMed

Rethlefsen SA, Healy BS, Wren TA, Skaggs DL, Kay RM. Causes of intoeing gait in children with cerebral palsy. J Bone Joint Surg Am. 2006 Oct; 88(10):2175-80. View in: PubMed

Michlitsch MG, Rethlefsen SA, Kay RM. The contributions of anterior and posterior tibialis dysfunction to varus foot deformity in patients with cerebral palsy. J Bone Joint Surg Am. 2006 Aug; 88(8):1764-8. View in: PubMed

Ho CA, Skaggs DL, Tang CW, Kay RM. Use of flexible intramedullary nails in pediatric femur fractures. J Pediatr Orthop. 2006 Jul-Aug; 26(4):497-504. View in: PubMed

Skaggs DL, Early SD, D'Ambra P, Tolo VT, Kay RM. Back pain and backpacks in school children. J Pediatr Orthop. 2006 May-Jun; 26(3):358-63. View in: PubMed

Skaggs DL, Lehmann CL, Rice C, Killelea BK, Bauer RM, Kay RM, Vitale MG. Access to orthopaedic care for children with medicaid versus private insurance: results of a national survey. J Pediatr Orthop. 2006 May-Jun; 26(3):400-4. View in: PubMed

Kay RM, Skaggs DL. Pediatric polytrauma management. J Pediatr Orthop. 2006 Mar-Apr; 26(2):268-77. View in: PubMed

Stewart DG, Kay RM, Skaggs DL. Open fractures in children. Principles of evaluation and management. J Bone Joint Surg Am. 2005 Dec; 87(12):2784-98. View in: PubMed

Wren TA, Rethlefsen SA, Healy BS, Do KP, Dennis SW, Kay RM. Reliability and validity of visual assessments of gait using a modified physician rating scale for crouch and foot contact. J Pediatr Orthop. 2005 Sep-Oct; 25(5):646-50. View in: PubMed

Wren TA, Woolf K, Kay RM. How closely do surgeons follow gait analysis recommendations and why? J Pediatr Orthop B. 2005 May; 14(3):202-5. View in: PubMed

Ryan DD, Rethlefsen SA, Skaggs DL, Kay RM. Results of tibial rotational osteotomy without concomitant fibular osteotomy in children with cerebral palsy. J Pediatr Orthop. 2005 Jan-Feb; 25(1):84-8. View in: PubMed

Wren TA, Rethlefsen S, Kay RM. Prevalence of specific gait abnormalities in children with cerebral palsy: influence of cerebral palsy subtype, age, and previous surgery. J Pediatr Orthop. 2005 Jan-Feb; 25(1):79-83. View in: PubMed

Skaggs DL, Friend L, Alman B, Chambers HG, Schmitz M, Leake B, Kay RM, Flynn JM. The effect of surgical delay on acute infection following 554 open fractures in children. J Bone Joint Surg Am. 2005 Jan; 87(1):8-12. View in: PubMed

Kay RM, Rethlefsen SA, Fern-Buneo A, Wren TA, Skaggs DL. Botulinum toxin as an adjunct to serial casting treatment in children with cerebral palsy. J Bone Joint Surg Am. 2004 Nov; 86-A(11):2377-84. View in: PubMed

Wren TA, Do KP, Kay RM. Gastrocnemius and soleus lengths in cerebral palsy equinus gait--differences between children with and without static contracture and effects of gastrocnemius recession. J Biomech. 2004 Sep; 37(9):1321-7. View in: PubMed

Kay RM, Rethlefsen S, Reed M, Do KP, Skaggs DL, Wren TA. Changes in pelvic rotation after soft tissue and bony surgery in ambulatory children with cerebral palsy. J Pediatr Orthop. 2004 May-Jun; 24(3):278-82. View in: PubMed

Gupta N, Kay RM, Leitch K, Femino JD, Tolo VT, Skaggs DL. Effect of surgical delay on perioperative complications and need for open reduction in supracondylar humerus fractures in children. J Pediatr Orthop. 2004 May-Jun; 24(3):245-8. View in: PubMed

Skaggs DL, Cluck MW, Mostofi A, Flynn JM, Kay RM. Lateral-entry pin fixation in the management of supracondylar fractures in children. J Bone Joint Surg Am. 2004 Apr; 86-A(4):702-7. View in: PubMed

Kay RM, Rethlefsen SA, Ryan JA, Wren TA. Outcome of gastrocnemius recession and tendo-achilles lengthening in ambulatory children with cerebral palsy. J Pediatr Orthop B. 2004 Mar; 13(2):92-8. View in: PubMed

Kay RM, Khounganian GS, Stevanovic M. Late extensor pollicis longus rupture following displaced distal radius and ulna fractures in a child. J Orthop Trauma. 2004 Jan; 18(1):53-6. View in: PubMed

Kay RM, Rethlefsen SA, Kelly JP, Wren TA. Predictive value of the Duncan-Ely test in distal rectus femoris transfer. J Pediatr Orthop. 2004 Jan-Feb; 24(1):59-62. View in: PubMed

Early SD, Kay RM, Tolo VT. Childhood diskitis. J Am Acad Orthop Surg. 2003 Nov-Dec; 11(6):413-20. View in: PubMed

Early SD, Kay RM, Maguire MF, Skaggs DL. Delayed neurologic injury due to bone graft migration into the spinal canal following scoliosis surgery. Orthopedics. 2003 May; 26(5):515-6. View in: PubMed

Kay RM, Rethlefsen SA, Hale JM, Skaggs DL, Tolo VT. Comparison of proximal and distal rotational femoral osteotomy in children with cerebral palsy. J Pediatr Orthop. 2003 Mar-Apr; 23(2):150-4. View in: PubMed

Flynn JM, Skaggs DL, Sponseller PD, Ganley TJ, Kay RM, Leitch KK. The surgical management of pediatric fractures of the lower extremity. Instr Course Lect. 2003; 52:647-59. View in: PubMed

Skaggs DL, Kay RM, Tolo VT. Fracture stability after pinning of displaced supracondylar distal humerus fractures in children. J Pediatr Orthop. 2002 Sep-Oct; 22(5):697; author reply 697-8. View in: PubMed

Skaggs DL, Roy AK, Vitale MG, Pfiefer C, Baird G, Femino D, Kay RM. Quality of evaluation and management of children requiring timely orthopaedic surgery before admission to a tertiary pediatric facility. J Pediatr Orthop. 2002 Mar-Apr; 22(2):265-7. View in: PubMed

Kay RM, Rethlefsen SA, Skaggs D, Leet A. Outcome of medial versus combined medial and lateral hamstring lengthening surgery in cerebral palsy. J Pediatr Orthop. 2002 Mar-Apr; 22(2):169-72. View in: PubMed

Tang CW, Kay RM, Skaggs DL. Growth arrest of the distal radius following a metaphyseal fracture: case report and review of the literature. J Pediatr Orthop B. 2002 Jan; 11(1):89-92. View in: PubMed

Kay RM, Jaki KA, Skaggs DL. The effect of femoral rotation on the projected femoral neck-shaft angle. J Pediatr Orthop. 2000 Nov-Dec; 20(6):736-9. View in: PubMed

Powered bySC CTSI