Papers by Hassanain Ali Lafta
Finite element analysis of the liver subjected to non-invasive indirect mechanical loading
International journal of computational science and engineering, 2024
Parotidectomy Surgical Simulation and Education with a Three-Dimensional Printed Face Model for Iraqi Surgeons
Frontiers in biomedical technologies, Apr 15, 2024
Analysis of reliability in 3D mandibular movements measurements
AIP Conference Proceedings, Dec 31, 2022
Designing an embedded multi-sensor autonomous system for walker-assisted locomotion
AIP Conference Proceedings, Dec 31, 2022
International journal of online and biomedical engineering, Oct 24, 2023
The hand of a human being is the most commonly utilized body part in daily activities. Assessing ... more The hand of a human being is the most commonly utilized body part in daily activities. Assessing the functional capability is highly challenging and important in medical applications purposes. This research aims to design and implement a sensor-based system for function assessment and movements analysis of the hand by calculating the angular velocity, acceleration and magnetic field for the joints of the fingers during the daily activities. The proposed system was applied to two groups of volunteers: The first group consisted of seven males, whereas the second group consisted of seven females, and the results were taken by calculating the acceleration, angular velocity, magnetic field during activities of daily living (ADL). This study showed the system is important in hand movement and control function evaluation. The thumb and index fingers have similar pitch orientations while interacting, while the middle finger employs a distinct range. Yaw variables are less noticeable, but the variation in roll angles between fingers is.
A Combined Computational and Experimental Analysis on the Thickness of the Urinary Bladder Wall Layers during Filling Phase
An expert approach to sleep analysis in Iraqi obstructive sleep apnoea patients
THE 6TH INTERNATIONAL CONFERENCE ON ENERGY, ENVIRONMENT, EPIDEMIOLOGY AND INFORMATION SYSTEM (ICENIS) 2021: Topic of Energy, Environment, Epidemiology, and Information System
Analysis of Muscle Activation in the Shoulder Mechanism
22nd Congress of the European Society of Biomechanics, May 11, 2016
Manual wheelchair propulsion is a daily life repetitive task which is primarily controlled by the... more Manual wheelchair propulsion is a daily life repetitive task which is primarily controlled by the upper limb and leads to biomechanical alterations that play a key role in triggering muscle imbalance and pain. It has been widely shown that manual wheelchair users have a high prevalence of upper limb injuries. Researchers have underlined that muscles involved during propulsion are one of the major causes of injuries, [1]. The purpose of this study is to analyse the electromyographic (EMG) activity of shoulder stabilising muscles during manual wheelchair propulsion.
Investigating Satisfaction and Usability of an Embedded Multi-Sensors Based Autonomous Walker Assistive Device
Evaluation of Obstructive Sleep Apnea based on a Statistical Analysis of the Respiratory Events in Iraqi Individuals
2021 4th International Conference on Bio-Engineering for Smart Technologies (BioSMART)
The most prevalent form of sleep-related respiratory disorders, obstructive sleep apnea (OSA), is... more The most prevalent form of sleep-related respiratory disorders, obstructive sleep apnea (OSA), is very common. It's marked by frequent cessations of breathing during sleep; these are caused by a collapsing of the top respiratory airway. Because of the complicated Polysomnography (PSG) test technique at sleep laboratories, OSA is largely undetected. The database for this research was constructed from 83 individuals (20 of them are control and 63 of them are OSA patients) from an all-night sleep study polysomnography device. The 63 OSA patients are divided into three groups according to the degree of severity to mild, moderate, and severe. Tukey multiple comparisons test was used to do multiple comparisons between different patients' groups and these comparisons will be in three directions. The first direction of comparison is the comparison between control (healthy) and severe OSA patients, the second direction of comparison is the comparison between mild and severe OSA patients, and the third direction of comparison is the comparison between moderate and severe OSA patients. Astatistical correlation analysis was performed for a respiratory event with the other events. The obtained findings [indicate the paramount importance of respiratory events analysis in classifying the severity of OSA patient's in to various degrees.
The Statistical Analysis of Urodynamic Parameters with Different Stress Urinary Incontinence
2021 IEEE International Biomedical Instrumentation and Technology Conference (IBITeC)
Impact of Upper Body Anthropometrics on Spatiotemporal Parameters during Manual Wheelchair Propulsion in Able-bodied Users
2020 IEEE 5th Middle East and Africa Conference on Biomedical Engineering (MECBME), 2020
for everyday manual wheelchair mobility, the stroking motion is a bilateral cyclic motion. Anthro... more for everyday manual wheelchair mobility, the stroking motion is a bilateral cyclic motion. Anthropometrics are still limited for the able-bodied population, but it is even scarcer in terms of the structural and functional characteristics of wheelchair users. A marker-based three-dimensional 3D motion analysis protocol was employed to investigate the interrelationship between manual users’ upper body anthropometric characteristics and the biomechanics of wheelchair propulsion in terms of spatiotemporal parameters such as propulsion angles, time, velocity and stroke cadence. These outcomes have been analysed according to the anthropometrics of fifteen novice able-bodied male individuals using the same hand-rim wheelchair with their steady self-selected speed and propulsion pattern. The findings of this study indicated a significant correlation that quantified the association of the user’s upper body anthropometrics with the biomechanical behaviour during the manual wheelchair mobility...
Analysis of upper body biomechanics and control in manual wheelchair users
Manual wheelchair propulsion involves repetitive shoulder range of motion and muscular activities... more Manual wheelchair propulsion involves repetitive shoulder range of motion and muscular activities. It is an important form of mobility for many people with lower limb disabilities who depend upon their upper body to provide means of locomotion for completion of their activities of daily living. As a result of greater than normal usage of the upper limbs, shoulder and wrist pain and pathology are common among manual wheelchair users. This study provides a biomechanical analysis of the manual wheelchair mobility in control subjects during their functional activities of daily living. Non-experienced wheelchair users were recruited per this study for their feature of novice as they could determine their own self-selected speed and pattern of propulsion and to limit any variability that would be existed by a study group with multiple inter-individual differences. In the context of manual wheelchair propulsion, biomechanics of upper body involves the study of how a manual wheelchair user ...
Analysis of muscle activation in the shoulder mechanism during manual wheelchair propulsion
Manual wheelchair propulsion is a daily life repetitive task which is primarily controlled by the... more Manual wheelchair propulsion is a daily life repetitive task which is primarily controlled by the upper limb and leads to biomechanical alterations that play a key role in triggering muscle imbalance and pain. It has been widely shown that manual wheelchair users have a high prevalence of upper limb injuries. Researchers have underlined that muscles involved during propulsion are one of the major causes of injuries, [1]. The purpose of this study is to analyse the electromyographic (EMG) activity of shoulder stabilising muscles during manual wheelchair propulsion.
Impact of wheelchair configurations on upper body biomechanics of manual wheelchair users
A Combined Computational and Experimental Analysis on the Thickness of the Urinary Bladder Wall Layers during Filling Phase
2021 Sixth International Conference on Advances in Biomedical Engineering (ICABME)
Cardiovascular system is primarily considered as the human body's transport system. Oxygen, c... more Cardiovascular system is primarily considered as the human body's transport system. Oxygen, carbon dioxide, nutrients and other vital substances to the various tissues of human body are carried by the blood which circulates in a closed circulation. The cardiovascular system has been comprised of a combination of several basic compartments, which are structurally connected to and functionally interact with each other. Engineering modeling of such important system has become a useful tool to diagnose the cardiovascular diseases and recommend the appropriate way of their medical treatment. This paper presents a quantified model describing the relationship between the input and output variables of the hemodynamic regulation of the system through implementing a set of first order differential equations that governing this performance and describing its parameters such as pressures, volumes and flows in a closed-loop lumped system. Construction of this model was based on the interacti...
2012 First National Conference for Engineering Sciences (FNCES 2012), 2012
Amputation is one of the oldest problems of the mankind. Amputee rehabilitation refers to rehabil... more Amputation is one of the oldest problems of the mankind. Amputee rehabilitation refers to rehabilitation of a patient after amputation. It is an important health care profession that provides treatment to individuals to develop, maintain and restore maximum movement potential and function throughout life. This paper describes the basic key planning and design criteria which should be considered in order to design a typical amputee rehabilitation facility, besides developing the functional quality while controlling construction and operating costs of the local amputee rehabilitation facilities. To perform the comparison study concerning with amputee rehabilitation facilities standard design, field visits were made to the four major amputee rehabilitation centers in Baghdad in order to satisfy the aim of this study. These centers are Al-Wasity teaching hospital, Baghdad Institute, Baghdad Artificial Limbs Center, and Sadder Al-Qanat factory. Throughout these field visits information were collected about their construction, units, workshops and other parameters affecting both of the prosthesis manufacturing process and the patient occupational therapy. Also the organization of required equipments and access to adjacent spaces and should also be considered in the design of these facilities. This was satisfied through making comparison study of what existed locally according to the recommended standards that may be used to achieve a safe, functional, supportive and effective environment for patients and staff members who are involved with the amputee rehabilitation facilities in our country, Iraq.
Clinical Magnetic Resonance Imaging (MRI) is a specialized diagnostic imaging tool capable of ana... more Clinical Magnetic Resonance Imaging (MRI) is a specialized diagnostic imaging tool capable of anatomic imaging, tissue chemical analysis as well as functional imaging of certain metabolic processes through using strong magnetic fields in order to induce and detect resonance at the nuclear (atomic) level. As the orientation of the magnetic field is manipulated and atomic nuclei (in particular the hydrogen atomic nuclei) are knocked off-axis, they emit faint radio frequency energy as they return to their polar orientation. These emissions are measured and allow a computer image to be created by the analysis of the frequencies emitted by resonating atoms comprising cell structures. The image is electronically enhanced, recorded on video, stored on tape or optical disk and reproduced as a laser image. The human body contains enormous numbers of hydrogen atoms-especially in water (H O) and lipid molecules, 2 therefore MR reflects tissue density and body chemistry and is particularly useful in providing images of soft tissues, [Bronzeno,2006]. The patient to be imaged must be placed in an environment in which several different magnetic fields can be simultaneously or sequentially applied to elicit the desired MR signal. Every MRI scanner utilizes a strong static field magnet in conjunction with a sophisticated set of gradient coils and radiofrequency coils. The gradients and the radiofrequency components are switched on and off in a precisely timed pattern, or pulse sequence. MR images are characterized by excellent contrast between the various forms of soft tissues within the body. For patients who have no ferromagnetic foreign bodies within them, MRI scanning appears to be perfectly safe and can be repeated as often as necessary without danger. This provides one of the major advantages of MRI over conventional X-ray and computed tomographic (CT)
International Biomechanics
Manual wheelchair propulsion is an important form of mobility for people with lower limb disabili... more Manual wheelchair propulsion is an important form of mobility for people with lower limb disabilities. Changes in the wheelchair configuration can affect, range of motion (ROM) of the upper limb joints, muscle actions and system stability. The purpose of this study is to investigate the impact of adjusting wheelchair configurations on upper body joints kinematics and muscle recruitment for able-bodied non experienced manual wheelchair users through applying a marker-based 3D motion analysis technique. Ten healthy male subjects were characterised for three wheelchair configurations, set by adjusting the horizontal axle position of both rear wheels by (3 cm) and (6 cm) posteriorly from the original position set by the manufacturer. Selected 3D kinematic and surface electromyography (sEMG) parameters of the upper body joints and shoulder muscles were measured in the Cardiff University Motion Analysis Laboratory. During the propulsion trials, trunk flexion/extension, lateral bending and axial rotation were evaluated within the average range of (7.50°±1.4°), (5.91°±1.23°) and (7.01°±3.91°), respectively. Dominant shoulder abduction/adduction, flexion/extension and internal/external rotation were evaluated within the average range of (24.63°±6.38°), (17.31°±4.27°) and (40.02°±12.35°), respectively. Dominant elbow pronation/supination and flexion/extension were evaluated within the range of (15.49°±7.70°) and (34.37°±8.38°), respectively. Dominant wrist radial/ ulnar deviation and flexion/ extension were evaluated within the average range of (29.82°±8.97°) and (53.59°±9.65°), respectively. With normalising the muscle EMG to the percentage of MVC activity, posterior deltoid had the highest average EMG muscle activity (11.43 ± 5.33) during the propulsion trials and at the three wheel adjustments relative to the other dominant shoulder muscles. Other average muscles activities were evaluated as (6.99 ± 2.37) for upper trapezius, (6.89 ± 2.51) for triceps brachii, (5.39 ± 2.95) for anterior deltoid, (3.26 ± 1.00) for biceps brachii and (3.14 ± 1.26) for pectoralis major as the lowest average activity. The findings of this study indicate that changing rear wheel axle position posteriorly is correlated with increasing the kinematic ROMs of the trunk and dominant upper limb and the sEMG activities of the muscles predominantly involved with the recovery phase of propulsion which could be linked with higher risks of musculoskeletal disorders. This knowledge may help professionals when designing and prescribing wheelchairs that are more proper to users' functional characteristics, accordingly profiting them improved quality of life.
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Papers by Hassanain Ali Lafta