Rheumatoid Arthritis

aparna593796 81 views 30 slides Jul 18, 2024
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About This Presentation

Rheumatoid arthritis (RA) is a chronic autoimmune disorder that primarily affects the joints, causing inflammation, pain, swelling, and stiffness. This condition occurs when the immune system mistakenly attacks the body's tissues, leading to joint damage and other systemic complications. RA comm...


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Rheumatoid Arthritis Aparna Sai Manasa  Gongala IV BHMS

Introduction Rheumatoid arthritis (RA) is a chronic inflammatory disorder affecting synovial joints. It affects approximately 1% of the population globally and leads to significant disability, impacting quality of life and increasing mortality.

Definition Davidson's Medicine: RA is a systemic autoimmune disease characterized by chronic inflammation of synovial joints, leading to progressive joint destruction, deformity, and loss of function. Harrison's Internal Medicine: Defines RA as a disease marked by symmetric, polyarticular inflammation, particularly involving small joints of the hands and feet.

Etiology Genetic Factors: Specific genetic markers, such as HLA-DR4, are associated with a higher risk of developing RA. These genes are involved in the regulation of the immune system Environmental Triggers : Smoking is a significant risk factor; other factors include infections and possibly dietary influences  Hormonal Factors : Higher incidence in females suggests a hormonal component  Familial Tendency : A family history of RA increases the likelihood of developing the disease, suggesting a hereditary component.

Pathology Synovial Membrane Inflammation: The synovial membrane becomes inflamed and thickened due to an immune response, leading to pain and swelling. Pannus Formation: Abnormal layer of fibrovascular or granulation tissue that can erode cartilage and bone. Cartilage and Bone Destruction: The aggressive pannus destroys the articular cartilage and subchondral bone, leading to joint deformities and loss of function.

Pathophysiology The pathology of RA has two phases: Initiation Phase: Autoimmune reaction initiated by environmental and genetic factors. Presentation of citrullinated proteins to T-cells . Chronic Phase: Persistent inflammation leads to synovial hyperplasia, pannus formation, and joint destruction. Osteoclast activation and bone erosion, organ failure.

Pathophysiology Antigen Presentation : In RA, antigen-presenting cells (APCs) present autoantigens to T cells. These autoantigens are derived from self-proteins, which are mistakenly identified as foreign. T Cell Activation : CD4+ T cells play a central role in the autoimmune response. They become activated and release cytokines, leading to the activation of other immune cells B Cell Activation : B cells are activated and differentiate into plasma cells, which produce autoantibodies such as rheumatoid factor (RF) and anti-citrullinated protein antibodies (ACPAs). These autoantibodies form immune complexes that contribute to inflammation. Cytokine Production : Activated T cells and macrophages release pro-inflammatory cytokines, including tumor necrosis factor-alpha (TNF- α), interleukin-1 (IL-1), and interleukin-6 (IL-6). These cytokines perpetuate inflammation and joint destruction

Pathophysiology Cellular Mechanisms: T-cells and B-cells play critical roles in sustaining the inflammatory process. T-cells activate macrophages and synovial fibroblasts, which in turn produce pro-inflammatory cytokines and enzymes that degrade cartilage and bone. Synovial Cell Hyperplasia and Angiogenesis: Synovial cells proliferate excessively, and new blood vessels form to supply the inflamed synovium, further sustaining the inflammatory process. Cytokines and Immune Cells : T-cells, B-cells, macrophages, and cytokines like TNF- α, IL-1, and IL-6 play crucial roles.

Clinical Features Early Symptoms:   Symmetrical joint pain swelling morning stiffness >30 minutes fatigue low-grade fever  Commonly Affected Joints:  Small joints of hands Feet Wrists Elbows & knees .

Clinical Features Advanced Symptoms Ulnar deviation Boutonnière deformity Swan-neck deformity Rheumatoid nodules Z-Shaped thumb MCP Subluxation Extra Articular Symptoms: Lung involvement (interstitial lung disease) cardiovascular disease anemia

ULNAR DEVIATION: It refers to the sideways bending of the fingers towards the ulna (the bone on the little finger side of the forearm). This occurs due to damage to the ligaments and tendons that stabilize the joints of the hand, leading to misalignment.

BOUTONNIÈRE DEFORMITY: This deformity involves the bending of the middle joint of the finger (PIP joint) inward (flexion) and the outermost joint (DIP joint) outward (extension). It is caused by damage to the extensor tendon, which prevents the finger from straightening fully.

SWAN-NECK DEFORMITY : This involves hyperextension of the PIP joint and flexion of the DIP joint, creating a shape resembling a swan's neck. It results from the loosening of the volar plate at the PIP joint and the over activity of the extensor tendon at the DIP joint.

RHEUMATOID NODULES : These are firm, non-tender lumps that typically appear under the skin, often near pressure points such as the elbows. They are composed of inflammatory cells and fibrin and occur in areas subject to repeated trauma or pressure. .

Z-SHAPED THUMB: Also known as "Z-thumb" or "zigzag thumb," this deformity involves hyperextension at the MCP joint and flexion at the IP joint of the thumb, creating a zigzag appearance. It results from chronic synovitis leading to imbalance in the tendon forces acting on the thumb joints.

MCP SUBLUXATION: Subluxation of the metacarpophalangeal (MCP) joints refers to the partial dislocation of these joints, leading to abnormal positioning of the fingers. Chronic inflammation and damage to the joint structures cause the bones to partially slip out of place.

Complications Joint Damage: Severe joint deformities, loss of function, disability   Radiographic Features: Joint space narrowing, erosions, osteopenia   Systemic Complications : Increased risk of cardiovascular disease (atherosclerosis), lung disease (fibrosis), osteoporosis, vasculitis, Felty's syndrome (splenomegaly and neutropenia

Investigations Blood tests:   Including rheumatoid factor and anti-CCP antibodies. Imaging tests:   Such as X-rays, MRI, and ultrasound to track the progression of RA in the joints. Other imaging tests:   Computed tomography (CT) scanning, positron emission tomography (PET) scan, and bone scan may also be considered.

General Management Physical Therapy: Tailored exercises to maintain joint flexibility, strength, and function Occupational Therapy: Techniques to protect joints and assist in daily activities Lifestyle Modifications : Balanced diet weight management smoking cessation

Surgical Management Synovectomy: Surgical removal of inflamed synovium to relieve pain and improve function   Joint Replacement: Total joint arthroplasty for severely damaged joints . Tendon Repair: Repair or reconstruction of tendons damaged by RA  

Homeopathic Therapeutics Rhus Toxicodendron Indications: Stiffness and pain in joints, especially after rest; pain worsens in cold, wet weather; relief from warmth and motion. Characteristic Keynotes: Restlessness, desire to keep moving, aggravation from initial motion but amelioration from continued motion, pain worse at night. Bryonia Alba Indications: Severe, stitching, and tearing pains; worse from any motion and better from rest; dryness of all mucous membranes. Characteristic Keynotes: Pain worse from slightest movement, irritable and wants to be left alone, dry mouth with thirst for large quantities of water. Pulsatilla Nigricans Indications: Wandering arthritis with changing symptoms; symptoms are worse in the evening, from heat, and better from cold applications and open air. Characteristic Keynotes: Changeable symptoms, weeping mood, better from consolation, aversion to fatty foods.

Causticum Indications: Chronic arthritis with deformities; contractions of flexor tendons, pain and stiffness, especially in hands and fingers. Characteristic Keynotes: Worse in dry, cold weather; better in damp, rainy weather; emotional sensitivity and sympathetic nature. Apis Mellifica Indications: Swelling and inflammation of joints; burning, stinging pains; worse from heat and touch, better from cold applications. - Characteristic Keynotes :Edematous swelling, thirstlessness despite dry mouth, restlessness and irritability. Arnica Montana Indications Soreness and bruised feeling in joints; pain worse from touch and movement. Characteristic Keynotes: Oversensitivity to pain, fear of being touched, bruised feeling all over the body.

Ledum Palustre Indications: Gouty arthritis affecting small joints, particularly of the feet and toes; pain worse from warmth and better from cold applications. Characteristic Keynotes: Ascending pains (beginning in lower limbs and going upwards), desire for cold applications, punctured wounds. Colchicum Autumnale Indications: Gouty and rheumatic pains, especially in small joints; worse in cold, damp weather. Characteristic Keynotes: Extreme sensitivity to odors, especially cooking food; pain aggravated by slightest motion, better from warmth and rest.

Ruta Graveolens Indications: Stiffness and soreness in joints and tendons; pain worse from cold and damp weather. Characteristic Keynotes: Sensation of bruising, lameness, pain better from lying down, worse from exertion and cold. Dulcamara Indications: Joint pains associated with cold and damp conditions; worse in cold, wet weather, and better in dry, warm weather. Characteristic Keynotes: Symptoms appear or worsen with cold, damp exposure; warts and skin eruptions, back pain. Symphytum Officinale Indications: Joint pains following trauma or injury; useful in promoting healing of fractures. Characteristic Keynotes: Pain in bones, non-union of fractures, injuries to the periosteum .

References/Sources used Davidson textbook of medicine Harrison internal medicine textbook Google scholarly   Google images

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