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Showing 6 results for Back Pain

Teymour Allahyari, Sara Hedayati, Hamidreza Khalkhali, Fariba Ghaderi,
Volume 2, Issue 2 (9-2014)
Abstract

Background: Patient Manual handling is one of the major risk factors in musculoskeletal disorders among healthcare workers (HCWs). Therefore, the purpose of this study was to estimate the mechanical force on the low back of the staff responsible for patient manual handling and to exam in the effect of patient manual handling by two people on the level forces exerted on HCWs ҆ low back. methods: the participants of this study were 10 health care workersdoing patient manual handling individually and by two people . To determine the posture of these people, we filmed them both from front and side and force plate was used to determine the weight of the patient handling by HCWs. 3DSSPP was used to estimate theforces exerted on the their low back during patient manual handling. Results: Results showed that among the four studied tasks, the maximum compression forces exerted on discs L4/L5 and L5/S1 were 3591 ± 863 and 3342 ± 827 respectively when the patient was seated on wheelchair. The Maximum shear force exerted on the disc L4/L5 and L5/S1 were 252 ± 122 432 ± 36 N respectively when patient was seated on the bed. No significant difference was seen in the average forces exerted on low back except seating patient on wheelchair. ( P> 0.05) Conclusions: The comparison of exerted force on disks with recommended limits revealed that only the task of placing patient on wheelchair exerted force on low back exceed NIOSH recommended weight limit. patient manual handling by two people most tasks of this study does not created significant difference. Therefore to reduce exert force on low back need ergonomic intervention including bed design, beds appropriate stabilization, training.
Naeimeh Asadi, Alireza Choobineh, Sareh Keshavarzi, Hadi Daneshmandi,
Volume 2, Issue 4 (3-2015)
Abstract

Introduction: Manual load lifting is the most common and most stressful activity in manual handling of loads that imposes the highest possible amount of biomechanical pressure on the body, particularly on the spine. The present study was conducted to determine the prevalence of musculoskeletal disorders and to estimate the mechanical force exerted on the lower back in workers responsible for manual load lifting.

Material and Methods: The present cross-sectional study was conducted on 120 workers responsible for manual load lifting activities in 7 industrial settings in the city of Shiraz. The Nordic Musculoskeletal Questionnaire (NMQ) was used for determining the prevalence of musculoskeletal disorders and the 3DSSPP software was used to estimate the forces exerted on the lower back during load lifting. Data were then analyzed in SPSS-19.Findings: The results showed that lower back problems constitute the most prevalent musculoskeletal disorder (68.3%). Evaluations conducted in 3DSSPP showed that in 17.5% of the cases, compressive forces, and in 10.8% of the cases, shearing forces exerted on the L5-S1 disc were higher in the workers than the permissible levels. There were no significant differences between the rate of the prevalence of lower back pain at different levels of compressive and shearing forces exerted on the disc (p>0/05).

Results: This finding might indicate the limitations of the method used in this study for conducting a comprehensive assessment of loads exerted on the spine.

Conclusion: The prevalence of musculoskeletal disorders, in particular lower back pain, was estimated to be high among the subjects studied. The risk levels of compressive and shearing forces exceeded the permissible amount in a low percentage of the workers studied. The 3DSSPP software might have certain limitations in the assessment of the pressure exerted on the spine.

 
Raziyeh Morshedi, Matreh Boazar, Davood Afshari, Kambiz Ahmadi Angali, Maryam Malek Zadeh,
Volume 3, Issue 1 (6-2015)
Abstract

Introduction: Manual handling of loads and carrying tasks widely exists in many occupations. Hospital staff because of Manual carrying of loads, are at increased risk of musculoskeletal disorders. Incorrect lifting methods, is an important risk factor for low back pain. The aim of this study was to analyze the biomechanical loads on the lumbar of nurses-aid in manual handling activities of serum cartons 12.5 kg in hospital and provide ergonomic solutions is the prevention of back pain. Methods: This study was conducted one of the hospitals in Ahvaz city in year 1392. evaluated Postures were sampled through observation and photography. Then load lifting of complex index, was calculated by NIOSH equation and estimate the compressive forces on vertebras L5/ S1 as a quantitative index using software 3 D SSPP, during 2 stages before and after the intervention. The results of tests using Correlation, Regression and T-test were analyzed Results: The results showed that the highest RWL in the top row 89/9 kg and minimum on the bottom row was 44/5 kg. The highest and lowest compressive force was estimated in the bottom and top rows, respectively, 6727 and 3707 Newton. Results of statistical tests showed significant reduction between the load lifting of complex index(CLI), and the compressive force average before and after the reform is the work station. Conclusion:Throgh biomechanical analysis of work stations with two methods quantitatively and qualitatively can be made more accurate assessment and ergonomic conditions at work stations can be modified more accurately.
Zohreh Yazdi, Mahnaz Abbasi, Freshteh Shamsi,
Volume 4, Issue 1 (6-2016)
Abstract

Introduction: Low back pain is the most common cause of chronic pain syndrome which leads to activity limitation in people younger than 45 years old.

Objectives: This study aimed to evaluate the relationship between severity of low back pain and work limitation in patients with acute and chronic low back pain.

Methods: Ninety patients with acute and chronic low back pain who attended the rheumatology Clinic of Booali Hospital were evaluated in this cross-sectional study. A questionnaire containing demographic information and one about the onset and cause of low back pain were asked from patients. Work Limitation Questionnaire was asked from patients. Severity of pain was measured by Visual Analogue Scale. All the data were analysed using SPSS software.

Results: The results showed that the most common cause of low back pain was discopathy with 33 patients (36.7%). There was no significant difference between males and females in terms of work limitation (P = 0.66). Patients with discopathy showed the most severe work limitations (72%). Also, there was a significant relationship between severity of work limitation and patients' age. Older patients had more severity of work limitations (P < 0.001, r = 0.42). There was a significant correlation between work limitation and severity of pain. Patients with increasing pain had more severity of work limitations (P < 0.001).

Conclusions: Our results showed that with increasing age and pain work limitations will increase due to low back pain.


Majid Shahbazi, Javad Sarrafzadeh, Saeed Akhlaghi, Hossein Negahban,
Volume 12, Issue 4 (2-2025)
Abstract

Objectives: Balance control is a crucial issue in patients with low back pain. Despite existing studies, the mechanism of balance control in patients with low back pain, especially under different loading conditions at various heights, remains unclear. Therefore, this study aimed to investigate the effect of height on balance during loading.
Methods: In this cross-sectional study, 54 low back pain patients and 20 healthy male individuals participated. Balance control was assessed using a force plate system. The participants were randomly instructed to lower the load from above the head to waist level and from waist level to the ground. The load was approximately 10% of the participants' body weight. The P value was established 5% level of significance.
Results: The results showed that during lifting from above the head to waist level and from waist level to the ground, there were significant differences (P<0.05) in variables such as medial-lateral and anterior-posterior velocity, total mean velocity, and center of pressure displacement in the anterior-posterior direction between the two groups. Intra-group comparisons of variables in healthy individuals and low back pain patients indicated significant differences (P<0.05) in all variables except anterior-posterior velocity in healthy individuals. Both groups exhibited increased postural sway while lowering at a lower height.
Conclusion: The present study demonstrates that both healthy individuals and low back pain patients display less balance when loading at a lower height with a flexed lumbar spine, indicating that considering these findings could contribute to rehabilitation, determining occupational conditions, and preventing workplace-related accidents.

Fatemeh Rezaie Pourmashizi, Behrouz Hajilou, Rashid Heidarimoghadam, Sara Anbarian, Mehrdad Anbarian,
Volume 13, Issue 1 (5-2025)
Abstract

Background and Objectives: Core muscles of individuals with low back pain show a different pattern of activity compared to the healthy group during load lifting. This issue may be due to changes in spinal control mechanisms such as muscle synergies. The aim of this study was to compare the synergy pattern of selected core muscles and lower limbs muscles during load lifting and lowering with two different techniqus among females with non-specific back pain in comparison with healthy group.

Methods: Eighteen healthy females with non-specific back apin and 18 match controls participated in this study. The activity of 8 muscles of the core and lower limbs was recorded while lifting a load of 10% of the subject's mass with stoop and squat techniques. Then, using non-negative matrix factorization algorithm, the pattern of muscle synergies was extracted. Pearson's correlation method and independed t-test was used to compare synergy patterns (p<0.05).

Results: Patients with back pain had a different muscle synergy pattern compared to the healthy group in both stoop and squat techniques. The peak muscle synergy patterns of patients in both techniques were different from healthy subjects and were created in a different time cycle of lifting the load.

Conclusion: The results of this study showed that individuals with non-specific back pain use different synergy patterns during load lifting, and the body's control system may respons differently in patients with non-specific low back pain compared to healthy individuals. It is possible that the changes observed in the relative weight of muscles in patients and healthy people are caused by the changes in muscle synergy patterns, which requires further studies.



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