Spinal load in nurses during emergency lifting of obese patients: preliminary results.

BACKGROUND: Nurses are exposed to the risk of injury while handling patients. This is particularly true for obese patients. OBJECTIVE: The goal of this paper is to estimate the spinal loads and the related risk of injury to nurses while lifting obese patients from the floor with a bariatric sheet during a hospital emergency. METHODS: Six male nurses participated in this study. The biomechanical analysis focused on the lifting strategy. Thirty obese in-patients were enrolled to take part in the experimental study and divided into three groups according to their Body Mass Index (BMI). Three-dimensional motion analysis was conducted using an optoelectronic system. The trunk kinematics and the loading on the spines of the operating nurses were computed. RESULTS: Our data showed that when the nurse was operating from the central handle, his trunk was more flexed at the end of the lift with a reduced range of motion. The values were higher when the nurse lifted patients with higher BMIs. All kinetic parameters and tension in the lumbar muscles at the end of the movement were characterised by lower values for the nurse placed beside the patient's head or feet if compared to the operator positioned beside the central handle in all patient groups. CONCLUSIONS: Our preliminary data suggest that only the reaction load on the spine of the nurse holding the central handle, closest to the patient's centre of mass, seems to exceed the recommended safety limits.

Does kinematics add meaningful information to clinical assessment in post-stroke upper limb rehabilitation? A case report.

[Purpose] The aims of this case study were to: (a) quantify the impairment and activity restriction of the upper limb in a hemiparetic patient; (b) quantitatively evaluate rehabilitation program effectiveness; and (c) discuss whether more clinically meaningful information can be gained with the use of kinematic analysis in addition to clinical assessment. The rehabilitation program consisted of the combined use of different traditional physiotherapy techniques, occupational therapy sessions, and the so-called task-oriented approach. [Subject and Methods] Subject was a one hemiplegic patient. The patient was assessed at the beginning and after 1 month of daily rehabilitation using the Medical Research Council scale, Nine Hole Peg Test, Motor Evaluation Scale for Upper Extremity in Stroke Patients, and Hand Grip Dynamometer test as well as a kinematic analysis using an optoelectronic system. [Results] After treatment, significant improvements were evident in terms of total movement duration, movement completion velocity, and some smoothness parameters. [Conclusion] Our case report showed that the integration of clinical assessment with kinematic evaluation appears to be useful for quantitatively assessing performance changes.

Center of pressure displacements during gait initiation in individuals with obesity.

BACKGROUND: Obesity is known to affect balance and gait pattern increasing the risk of fall and injury as compared to the lean population. Such risk is particularly high during postural transitions. Gait initiation (GI) is a transient procedure between static upright posture and steady-state locomotion, which includes anticipatory antero-posterior and lateral movements. GI requires propulsion and balance control. The aim of this study was to characterise quantitatively the strategy of obese subjects during GI using parameters obtained by the Center of Pressure (CoP) track. METHODS: 20 obese individuals and 15 age-matched healthy subjects were tested using a force platform during the initiation trials. CoP plots were divided in different phases, which identified the anticipatory postural adjustments (APA1, APA2) and a movement phase (LOC). Duration, length and velocity of the CoP trace in these phases were calculated and compared. RESULTS AND DISCUSSION: The results show that the main characteristic of GI in obese participants is represented by a higher excursion in medio-lateral direction. This condition lead to longer APA length and duration, which are statistical significant during APA2 when compared to control subjects. We also found longer duration of APA1 and LOC phases. In terms of velocity, most of the phases were characterised by a reduced CoP velocity in antero-posterior direction and faster movement in medio-lateral direction as compared to the control group. CONCLUSIONS: Our findings provide novel evidence in GI in obese subjects that may serve for developing exercise programs aimed at specifically improving balance in both the antero-posterior and lateral directions. Such programs together with weight management may be beneficial for improving stability during postural transitions and reducing risk of fall in this population.

Mechanisms underlying center of pressure displacements in obese subjects during quiet stance.

OBJECTIVE: the aim of this study was to assess whether reduced balance capacity in obese subjects is secondary to altered sensory information. DESIGN: cross sectional study. SUBJECTS: 44 obese (BMI = 40.6 ± 4.6 kg/m2, age = 34.2 ± 10.8 years, body weight: 114,0 ± 16,0 Kg, body height 167,5 ± 9,8 cm) and 20 healthy controls (10 females, 10 males, BMI: 21.6 ± 2.2 kg/m2, age: 30.5 ± 5.5 years, body weight: 62,9 ± 9,3 Kg, body height 170,1 ± 5,8 cm) were enrolled. MEASUREMENTS: center of pressure (CoP) displacements were evaluated during quiet stance on a force platform with eyes open (EO) and closed (EC). The Romberg quotient (EC/EO) was computed and compared between groups. RESULTS: we found statistically significant differences between obese and controls in CoP displacements (p < 0.01) and no statistically significant differences in Romberg quotients (p > 0.08). CONCLUSION: the increased CoP displacements in obese subjects do not need an hypothesis about altered sensory information. The integration of different sensory inputs appears similar in controls and obese. In the latter, the increased mass, ankle torque and muscle activity may probably account for the higher CoP displacements.

[Obesity and work: an emerging problem]. / Obesità e lavoro: un problema emergente.

In Italy, 42.5% of adult males is overweight and 10.5% obese, while 26.6% of the women is overweight and 9.1% obese. The economical consequences of a growing number of obese workers are relevant: obesity is associated to reduced participation to productive life, increased absenteeism, disability and need for health care, lower salaries, negative impact on productivity. The obese worker is characterized by reduced tolerance to effort, limited range of motion at spinal and joints level, reduced muscle strength normalized per body weight, lower tolerance to prolonged postures, reduced balance and overall reduced work capacity linear to the increase of body mass index. The present article reviews the most evident relationships between work factors (stress, musculoskeletal disorders, etc.) and obesity and speculates about possible interventions to prevent occupational issues for obese workers.

Mapping an obesity clinical evaluation protocol to the International Classification of Functioning, Disability and Health.

PURPOSE: To evaluate a multidisciplinary clinical protocol for obesity treatment by mapping it against the International Classification of Functioning, Disability and Health (ICF) and to determine the areas, defined by the ICF, in which no standardized assessment tools are available. METHOD: Assessment instruments used by a multidisciplinary team were linked to ICF categories and compared with a list of ICF categories composed by the ICF checklist and the comprehensive ICF core-set for obesity. Other relevant ICF categories were added, and not relevant ones were deleted when appropriate. RESULTS: Five ICF categories were deleted and 11 were added, and 166 ICF categories were linked to assessment tools and to semi-structured interviews. The majority were linked to assessment tools, but within the domain of the environmental factors all ICF categories were mapped using semi-structured interviews. CONCLUSIONS: Our results show that an extended list of ICF categories is adequate to cover a wide spectrum of clinical and functional information, and it could be employed to describe, disability profiles of obese patients, to develop preventive measures and to identify what factors in the environment need to be changed to improve rehabilitation's outcomes.

Gender-specific effect of obesity on balance.

Obesity modifies the body geometry by adding mass to different regions and it influences the biomechanics of activities of daily living. Weight influences postural stability, but there is no consensus as to whether the different fat distribution in males and females produces gender-related effects on balance. The aim of this study was to investigate the effect of body weight increases on postural performance in males and females. A total of 22 obese females (BMI: 41.1+/-4.1 kg/m2) and 22 obese males (BMI: 40.2+/-5 kg/m2) were analyzed during a static posture trial on a force platform in standardized conditions. Twenty healthy subjects (10 females, 10 males) constituted the control group. We computed the following parameters related to the center of pressure (CoP): velocity and displacements along the antero-posterior (AP) and medio-lateral axis (ML). We found several statistically significant differences between healthy and obese men, in particular regarding the AP and ML CoP parameters, which were correlated to body weight (r=0.36-0.58). The comparison between healthy and obese females pointed out statistically significant differences in AP parameters and no significant differences in ML displacements. Body weight was found to correlate with AP parameters (r=0.36-0.74), but not with ML displacements. The increased body mass seems to produce AP instability in both genders and ML destabilization only in males. Rehabilitation programs should take these findings into account by adopting specific interventions to improve ML control in obese males, and through weight loss and strengthening of ankle flexors/extensors in both genders.