Occupational pesticide poisoning

Impact of forced body posture

Many types of professional activity are associated with exposure to a complex of mechanical factors. These include working in an unnatural, physiologically unjustified position, direct physical pressure of various objects on body areas, and permanent tension of specific muscle groups and internal organs.

Pathogenetic mechanisms Exposure to these hazards triggers a cascade of pathological changes:

• Gradual deformation of anatomical structures occurs (primarily the musculoskeletal system).
• Pronounced stasis phenomena develop in the bloodstream.
• Functional overstrain of internal organs forms.

Together, these processes not only sharply reduce a person's current work capacity but also serve as a foundation for the development of chronic occupational diseases.

Occupational pathologies in various working postures

The nature of the developing pathology directly depends on the typical working posture and the specifics of the physical load in the workplace:

• Working in a standing position (especially with a bent torso): provokes curvature of the spinal axis and deformation of the lower extremities. In young women, pathological changes in pelvic shape are possible. Flat feet and varicose veins of the legs are frequently recorded.
• Work in a sitting position (stooped posture): causes a wide range of disorders. Spinal curvatures (scoliosis, kyphosis, slouching) are characteristic. Pronounced venous blood stasis occurs in the abdominal cavity, lesser pelvis, and rectum, leading to hemorrhoids. Digestive processes are disrupted. Due to chest compression, pulmonary blood supply worsens, creating prerequisites for anemia. Chronic pain in the lumbosacral region is typical.
• Working in a lying position (on the back or side): has an extremely negative, depressing effect on the basic physiological functions of all body systems.
• Transportation and lifting of heavy loads: lead to gross skeletal deformations and create high intra-abdominal pressure, which contributes to the formation of femoral and inguinal hernias.

Prevention principles and ergonomics

To minimize harm to health, a comprehensive approach is applied, including organizational and ergonomic solutions.

Organizational and technical transformations The basis of prevention is the introduction of automation and maximum mechanization of heavy production processes. In addition, optimization of the working posture is necessary through the design of modern industrial furniture.

Requirements for the office/work chair An ergonomic workstation must meet strict criteria:

1. Backrest: must provide reliable, comfortable support for the back; mechanisms for adjustment along both the vertical axis and in the anteroposterior direction are required.
2. Seat: must follow the anatomical contours of the buttocks. The ability to change height (e.g., using a screw mechanism) is mandatory.
3. Armrests: are necessary for adequate support and unloading of the arms.
4. Additions: it is strongly recommended to use a special footrest.

Rationalization of the labor regime It is important to introduce regulated work breaks, conduct industrial gymnastics, and teach employees hand self-massage (especially in the first half of the shift). The worker should be able to freely change posture during the day.

Overstrain of the visual analyzer

The proportion of professions requiring intensive "visual work" is continuously increasing. Constant visual strain is an independent and extremely significant occupational risk factor.

Risk groups include specialists engaged in the assembly of high-precision equipment, watchmakers, jewelers, dentists, and all workers whose activities are associated with the regular use of optical devices (e.g., microscopes). Prolonged fixation of gaze on small details requires colossal strain on the extraocular muscles and the accommodation apparatus of the eye.

Briefly: answers to topical questions

Class and exam questions

What else to study on this topic

• Pathogenesis of stasis phenomena in the lesser pelvis during hypodynamia
• Biomechanics of heavy lifting and the risk of hernia formation
• Effect of chest compression on pulmonary blood supply
• Methods of industrial gymnastics for relieving muscle spasms
• Specifics of visual fatigue when working with a microscope

Other topics in "Chapter 6. Fundamentals of Occupational Hygiene and Physiology"

Prepared by WhiteCoat Pro faculty in accordance with the medical school curriculum. For educational purposes only.