Case study of hydrotherapy intervention in a child with spastic diplegic cerebral palsy

Abstract

The following case study will include an assessment, treatment and evidence that supports aquatic therapy for a four year old child diagnosed with spastic diplegia cerebral palsy (CP). CP is the most common childhood physical disability and as such it can have significant impacts on a child’s function, participation and inclusion in activity. It is also common for children with CP to present with additional comorbidities that impact overall health and make learning new tasks difficult. Aquatic therapy has been found to improve strength and function for children diagnosed with CP. Therefore, the purpose of this case is to discuss the positive effects of an 10 week aquatic therapy intervention for a four year old child diagnosed with CP. It will also highlight outcome measures that were used to determine a baseline and monitor treatment progress for a child participating in hydrotherapy.

Introduction

Cerebral Palsy (CP) is a movement and postural disorder that appears in early childhood or infancy as a result of brain damage. Though there are several definitions in the literature, CP can generally be classified as any non-progressive central nervous system injury occurring during the first two (some literature says five) years of life. After the age of five, brain damage is classified as an acquired brain injury. In 2011, Statistics Canada found that 0.1% of the Canadian population, or just over 42,000 people were diagnosed with CP. Globally, population-based studies indicate that the prevalence of CP is said to range from 1.5 to more than 4 per 1,000 live births or children of a determined age range. However, there is no one test used to diagnose CP and the presentation of the condition will look very different from one person to another. According to the CP Canada Network, general categories include hemiplegia (affecting the ipsilateral arm and leg); diplegia (affecting both legs or arms); and quadriplegia (affecting both arms and legs, muscles of the trunk, mouth and face). Symptoms that can present with CP depend on which area(s) of the brain are injured. For example, possible symptoms include muscle tightness or spasm, involuntary movements, difficulty with gross motor skills and abnormal perception and sensation.

Although there is no cure for CP, the condition can be managed allowing those that have CP to go to school, work, get married and participate in society. In fact, over half of the children diagnosed with CP (58%) can walk independently and another 3% can walk using a mobility device. Early intervention with supports such as physiotherapy (PT) can help individuals to achieve this independence. Specifically, PT aims to help people with CP achieve their physical mobility by promoting exercises that emphasize independence.

The purpose of this case study is to discuss the effects of a hydrotherapy intervention strategy for a four year old child with spastic diplegic CP. It should be noted that the focus of the following case study will be on a hydrotherapy intervention however, the therapist will also be prescribing exercises for parents to work on at home with the patient. Difficulties managing this case predominantly encompassed initial communication and rapport-building between the therapist and patient, as well as the patient’s low confidence when starting to walk without her gait aid. All of these difficulties resolved themselves as the patient became more familiar with the therapist, and confidence in her prescribed exercises improved.

The following cases provide a description of why aquatic therapy was determined to be an appropriate and evidence-based intervention for a child with CP. According to Roostaei, Baharlouei, Azadi and Fragala-Pinkham, the buoyancy of aquatic therapy makes it easier for children who have mild to moderate limitations to move compared to exercises out of water. Performing exercises such as walking in water has the potential for better joint alignment in addition to allowing the opportunity to perform movements such as jumping and running that can have a harder impact on joints. In addition, walking in water provides a better opportunity for muscle strengthening due the increased resistance to movement. However, it is also important to engage the patient in participation and encourage their active participation. Kelly and Darrah, noted that the properties of water not only make it easier for children with CP to move but also make exercises more interesting and motivating. According to a literature review by Roostaei et al., three of the 11 studies they found specifically targeted participants who were younger (approximately 2-9 years old), two of which demonstrated significant changes as measured by the Gross Motor Function Classification System (GMFCS). One of the studies (a control trial design) by Lai, Liu, Yang, Chen, Wu & Chan, found that the pediatric hydrotherapy group had a greater GMFCS average than the control group and showed higher scores on the Physical Activity Enjoyment Scale than the control group after treatment. The delivery method of these studies varies from individual sessions to group therapy. However, the majority of these 11 studies used a 1:1 instructor to child ratio. As such the current case study will follow a 1:1 ratio of therapist to child. Roostaei et al. also found that the length of sessions may impact improvement as measured by the GMFCS regardless of intensity of treatment. For example, these authors recommend sessions of 45 minutes or longer since sessions lasting 30 minutes or less did not show improvement in total GMFCS score even when higher intensity exercises were conducted. Therefore, the current case study will also focus on therapy sessions lasting a minimum of 45 minutes.

Client Characteristics

Patient is a 4 year old female who was diagnosed with spastic diplegia cerebral palsy at birth. She was born prematurely. Patient presents with an abnormal gait pattern and poor trunk control, and has previously had interventions for balance, trunk control and gait aid training. She is currently using a four-wheeled walker with forearm support, and has outgrown her orthotics. In addition to a gait assessment, the author’s intervention objectives will be to update the patient’s current home exercise program and assess appropriateness for hydrotherapy.

The patient has epilepsy (controlled with medication), mild ADHD, and wears prescription glasses. She has continuous follow-up care with medical staff to monitor progression of her CP.

Examination Findings

Subjective

The patient has had difficulty navigating less accessible environments outside of the home with her walker. Her parents’ current concern is that she is starting kindergarten in the fall at a fully integrated, but only somewhat accessible public school. She will have assistance from an Education Assistant, as well as an Individualized Education Plan outlining modifications & accommodations in physical education and fine motor control, however she would navigate more easily without her walker. It is important to the patient that she has better mobility independence in order to play with her classmates, and she would like new orthotics that fit her better. The patient’s parents report she has low walking endurance (must use gait aid for longer distances), trouble toileting (functional incontinence due to limited strength and balance while holding seated position), and mild reflux.

Objective

Observation

Upon observation in quiet standing the patient presented with knee valgus, abnormal trunk and knee flexion and internally rotated lower limbs. When observing gait, The patient presented with a toe-walking gait. Gait analysis found bilateral hip flexion, adduction, and internal rotation, as well as a bilateral decrease in stride length. She had excessive knee flexion and ankle plantarflexion due to hamstring and plantarflexor spasticity and/or contractures, and an overall reduced gait velocity. In the upper extremity her arm swing was reduced (more notably on the right side), and she held her arms at 90-90 during the full gait cycle. Her trunk also demonstrated excessive bilateral trunk sway towards the stance leg throughout the full gait cycle. Neurological Testing The patient’s neurological and vascular assessment found hyperreflexivity in her upper and lower limbs, with clonus presenting in the lower. No other significant findings were noted.

Range of Motion

Goniometry was used to measure the patient's active (AROM) and passive range of motion (PROM). The patient’s upper limbs were within functional limits, however her lower limb values were all significantly decreased. The patient's knee extension was limited in 15 degrees of knee flexion. AROM ankle dorsiflexion was limited in 30 degrees of ankle plantar flexion and PROM was limited to 0 degrees. Lastly, hip extension was limited in 5 degrees of hip flexion.

Condition Specific Classification

The gross motor function classification system (GMFCS)[1] was used to describe the motor function of the patient and to distinguish her functional abilities, quality of movement and needs for assistive technology. The patient can walk in most settings and climb stairs holding onto a railing. She experiences difficulty walking long distances without a gait aid and balancing on uneven terrain and inclines. She has minimal ability to perform gross motor skills such as running and jumping. Parents say that she has difficulty walking in crowded areas or confined spaces. As a result, the patient was classified as a GMFCS Level II.

The manual ability classification system (MACS)[2] was used to observe the patient's fine motor skills, to see how she can handle objects in every day activities and to determine her need for assistance or adaptation to perform manual activities in everyday life. The patient was able to handle objects but with reduced speed, coordination and precision.

Functional Outcome Measures

Clinical Hypothesis

4 year old female diagnosed with spastic diplegic cerebral palsy. She is GMFCS CP Level 2. Currently she is using a 4WW to ambulate for longer distances. She has a toe walking gait due to hypertonic hamstrings and plantarflexors. She is MACS Level 2. Her upper extremities are only affected during fine motor skills. She would benefit from PT to address her gait, balance and trunk control so she is able to attend full-time kindergarten independently, and referral to OT to address fine motor skills. Prognosis is good and patient is expected to improve PT problem list with hydrotherapy, treadmill training, and an updated HEP.

Physiotherapy Intervention

Intervention	FITT	Goals	Outcome Measure(s)
Goal-directed training & home programs	F: 2-3x/week I: challenging by end of set T: 10 reps, 3 sets T: strengthening (squats, leg extensions, bridging etc.)	Improve function and self-care Improve gait by increasing L/E strength	6-Minute Walk Test (6MWT)
	F: every day I: challenging balance while staying safe T: 5-10 minutes T: balance (seated, reaching, standing with wide/narrow BOS,  add throwing ball against wall while sitting/standing if able)	Improve function and self-care Improve gait by increasing balance	Pediatric Balance Scale (PBS) The Trunk Control Measurement Scale
	F: every day I: to point of slight discomfort but no sharp pain T: 30 sec each stretch, 3x T: stretching (all major muscle groups especially those with increased tone or tightness)	Improve function and self-care Increase ROM	Goniometry
Strength Training Lower Limb - Treadmill Training	F: 3x/week I: 4-6 /10 BORG T: 30 minutes T: Gait training, endurance	Improve gait speed Improve endurance	6MWT Timed Up and Go test (TUG)
Hydrotherapy	F: 2x/week I: 4-6 /10 BORG T: 45 minutes T: resistance exercises, ROM, cardiovascular- focused games, trunk / balance - focused tasks	Improve motor activities Increase strength by using water resistance Increase ROM Reduce tension in muscles Improve cardiovascular conditioning (heart pumps more blood per beat when body is submerged in water) Improve balance by increasing trunk control	Modified Ashworth Scale (MAS) PBS The Trunk Control Measurement Scale

Outcome

Patient saw a change in 13 points on the pediatric balance scale (Pre-intervention- 42, Post intervention: 55/57) which substantially reduces the patient’s probability of falling. Spasticity was also significantly reduced over the 10 week period (minimally clinical important difference [MCID] 2 points) (Shirley Ryan Ability Lab, n.d) bilaterally in the hamstrings (MAS pre: 4, post: 2), quadriceps: (MAS pre: 3, post: 1), hip flexors (MAS pre: 4, post: 1) and plantar flexors (MAS pre: 4, post: 2). At the 6 week mark onward, the patient also had a noticeably larger stride length and increased gait velocity. This likely contributed to the reduction in 5.1 seconds in the TUG test and reduction of 60.9m in the 6MWT using the newly fitted gait aid. Although there is no MCID established for GMFCS level II for CP, there is a minimal detectable change for children with CP classified as GMFCS level III of 47.4m (Thompson, Beath, Bell et al., 2008), Therefore, it can be hypothesized that reduced spasticity and increased ROM in the lower limbs had a positive functional outcome effect on the patient's gait pattern which resulted in an increase in her capacity for mobility and ambulation.