Dr. Alex Jimenez, El Paso's Chiropractor
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Knee Arthritis: Diagnostic Imaging Approaches II | El Paso, TX.

Sagittal Fluid Sensitivity

knee arthritis chiropractic care el paso tx.
  • Sagittal Fluid Sensitive MR slice showing large synovial popliteal (Baker’s) cyst (above top image) and large synovial effusion (above bottom image)
  • Note multiple patchy dark signal areas on both images, representing fibrinoid inflammatory depostits aka “rice bodies” a characteristic MRI feature of RA

Management Rheumatological Referral & DMARM

Septic Arthritis (SA)

  • Septic arthritis – d/t bacterial or fungal contamination of the joint. SA may causes rapid joint destruction and requires prompt Dx and antibiotic administration
  • Joints affected: large joints with rich blood supply (knee 50%>hips>shoulders).
  • Routs of Infection:
  • 1) Hematogenous is m/c
  • 2) Spread from an adjacent site
  • 3) Direct implantation (e.g. trauma, iatrogenically)
  • Patients at risk: children, diabetics, immunocompromised, pre-existing joint damage/inflammation e.g. RA etc.
  • I.V. drug users are particularly at risk and in addition may contaminate atypical joints “the S joints” SIJ, SCJ, Symphysis pubis, ACJ etc.
  • Clinically: may vary and depends on host immune response and bacterial virulence. May present with rapid onset or exacerbation of pre-existing joint pain, swelling, limitation of ROM. General signs of malaise, fever, fatigue and elevated ESR, CRP, Leucocytosis may be present.
  • N.B. Diabetics and immunocompromised may present with fewer manifistations and lack of fever d/t declining immune response
  • Dx: clinical, radiological and laboratory. Arthrocentesis may be necessary for culture, cell count and purulent synovial examination
  • Management: I.V. antibiotics
  • Imaging Dx: begins with radiography but in the early stage most likely will be unremarkable. MRI can be sensitive and help with early identification of joint effusion, bone edema etc. US may be helpful in the superficial joints and in children. US helps with needle guidance. Bone scintigraphy may be used occaisonally if MRI is contraindicated

Routes of Joint Contamination

knee arthritis chiropractic care el paso tx.
  • 1. Hematogenous (M/C)
  • 2. Spread from the adjacent site
  • 3. Direct inoculation
  • M/C organism-Staph aureus
  • N.B Gonococcal infection may be a top differential in some cases
  • IV drug users: pseudomonas, candida
  • Sickle cell: Salmonella
  • Animal (cats/dogs) bites: Pasteurella
  • Occaisonally fungal contamination may occur
knee arthritis chiropractic care el paso tx.

Radiography

knee arthritis chiropractic care el paso tx.
  • Initially non-specific ST/joint effusion, obscuration/distortion of fat planes. Because it takes 30% of compact and 50-75% trabecula bone to be destroyed before seen on x-rays, radiography is insensitive to some of the early changes. MR imaging is the preferred modality
  • If MRI is not available or contraindicated. Bone scintigraphy with Tc-99 MDT can help
  • In children US preferred to avoid ionizing radiation. In children US can be more sensitive than in adults due to lack of bone maturation

Radiographic Dx

knee arthritis chiropractic care el paso tx.
  • Early findings are unrewarding. Early features may include: joint widening d/t effusion. Soft tissue swelling and obscuration/displacement of fat planes
  • 1-2 weeks: periarticular and adjacent osseous changes manifesting as patchy demineralization, moth-eaten, permeating bone destruction, loss and indistinctness of the epiphyseal “white cortical line” with increase in soft tissue swelling. MRI may be helpful with early Dx.
  • Late features: complete joint destruction and ankyloses
  • N.B. Septic arthritis may progress rapidly within days and requires early I.V. antibiotic to prevent major joint destruction

T1 & T2 Knee MRI

knee arthritis chiropractic care el paso tx.
  • T1 (above left) and T2 fat-sat sagittal knee MRI slices reveal loss of normal marrow signal on T1 and increase on T2 due to septic edema. Bone sequestrum d/t osteomyelitis progressing into septic arthritis is noted. Marked joint effusion with adjacent soft tissue edema are seen. Dx: OSM and septic arthritis
  • Imaging may help the Dx of septic joint. However, the final Dx is based on Hx, physical examination, blood tests and most importantly synovial aspiration (arthrosentisis)
  • Synovial fluid should be sent for Gram staining, culture, glucose testing, leukocyte count, and differential determination
  • ESR/CRP may be elevated
  • Synovial fluid: WBC can be 50,000-60,000/ul, with 80% neutrophils with depleted glucose levels Gram stain: in 75% gram-positive cocci. Gram staining is less sensitive in gonococcal infection with only 25% of cultures +
  • In 9% of cases, blood cultures are the only source of pathogen identification and should be obtained before antibiotic treatment
  • Articles: www.aafp.org/afp/2011/0915/p653.html  
  • www.aafp.org/afp/2016/1115/p810.html

Crystal-Induced Knee Arthritis

  • Crystalline arthritis: a group of arthropathies resulting from crystal deposition in and around the joint.
  • 2-m/c: Monosodium urate crystals (MSU)  and Calcium Pyrophosphate Dehydrate crystals (CPPD) arthropathy 
  • Gout: MSU deposition in and around joints and soft tissues. Elevated levels of seurm uric acid (UA) (>7mg/dL) causd by overproduction or under-excretion of uric acid
  • Once UA reached/exceeded 7mg/dL it will deposit in the peripheral tissues. Primary gout: disturbed metabolism of nucleic acids and purines breakdown. Secondary gout: increased cell turnover: Psoriasis, leukemia, multiple myeloma, hemolysis, chemotherapy etc.
  • Gout presents with 5-characteristic stages:
  • 1)asymptomatic hyperuricemia (years/decades)
  • acute attacks of gouty arthritis (waxes and wanes and lasts for several years)
  • Interval phase between attacks
  • Chronic tophacious gout
  • Gouty nephropathy
knee arthritis chiropractic care el paso tx.

Clinical Presentation

  • Depends  on stages
  • Acute attacks: acute joint pain “first and the worst” even painful to light touch
  • DDx: septic joint (both may co-exist) bursitis etc.
  • Gouty arthritis typically presents as monoarthropathy
  • Chronic tophacious stage: deposits in joints, ear pinna, ocular structures and other regions. Nephrolithiasis etc. Men>women. Obesity, diet, and age >50-60.
  • Radiography: early attacks are unremarkable and may present as non-specific joint effusion
  • Chronic tophacious gout radiography: punched out peri-articular, para-aticular and/or intraosseous erosions with overhanging edges. Characteristic rim of sclerosis and internal calcification, soft tissue tophi. Target sites: lower extremity m/c
  • Rx: allopurinol, colchicin (esp. preventing acute episodes and maintenance)

Synovial Aspiration

knee arthritis chiropractic care el paso tx.
  • Synovial aspiration with polarized microscopy reveal negatively birefringent needle-shaped MSU crystals with large inflammatory PMN presence. DDx: positively birefringent rhomboid-shaped CPPD crystals (above bottom right) seen in Pseudogout and CPPD
knee arthritis chiropractic care el paso tx.

Large S.T.

knee arthritis chiropractic care el paso tx.
  • Density and joint effusion puched out osseous erosion with overhanging margins, overall perservation of bone density, internal calcifications Dx: chronic tophacious gout

MRI Gout Features

knee arthritis chiropractic care el paso tx.
  • Erosions with overhanging margins, low signal on T1 and high on T2 and fat suppressed images. Peripheral contrast enhancement of tophacious deposits d/t granulation tissue
  • Dx: final Dx; synovial aspiration and polarized microscopy

Additional Articles

Knee Arthritis

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Professional Scope of Practice *

The information herein on "Knee Arthritis: Diagnostic Imaging Approaches II | El Paso, TX." is not intended to replace a one-on-one relationship with a qualified health care professional or licensed physician and is not medical advice. We encourage you to make healthcare decisions based on your research and partnership with a qualified healthcare professional.

Blog Information & Scope Discussions

Our information scope is limited to Chiropractic, musculoskeletal, acupuncture, physical medicines, wellness, contributing etiological viscerosomatic disturbances within clinical presentations, associated somatovisceral reflex clinical dynamics, subluxation complexes, sensitive health issues, and/or functional medicine articles, topics, and discussions.

We provide and present clinical collaboration with specialists from various disciplines. Each specialist is governed by their professional scope of practice and their jurisdiction of licensure. We use functional health & wellness protocols to treat and support care for the injuries or disorders of the musculoskeletal system.

Our videos, posts, topics, subjects, and insights cover clinical matters, issues, and topics that relate to and directly or indirectly support our clinical scope of practice.*

Our office has reasonably attempted to provide supportive citations and has identified the relevant research studies supporting our posts. We provide copies of supporting research studies available to regulatory boards and the public upon request.

We understand that we cover matters that require an additional explanation of how it may assist in a particular care plan or treatment protocol; therefore, to further discuss the subject matter above, please feel free to ask Dr. Alex Jimenez, DC, or contact us at 915-850-0900.

We are here to help you and your family.

Blessings

Dr. Alex Jimenez DC, MSACP, RN*, CCST, IFMCP*, CIFM*, ATN*

email: coach@elpasofunctionalmedicine.com

Licensed as a Doctor of Chiropractic (DC) in Texas & New Mexico*
Texas DC License # TX5807, New Mexico DC License # NM-DC2182

Licensed as a Registered Nurse (RN*) in Florida
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Compact Status: Multi-State License: Authorized to Practice in 40 States*

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Disclaimer *

The information herein is not intended to replace a one-on-one relationship with a qualified health care professional, licensed physician, and is not medical advice. We encourage you to make your own health care decisions based on your research and partnership with a qualified health care professional. Our information scope is limited to chiropractic, musculoskeletal, physical medicines, wellness, sensitive health issues, functional medicine articles, topics, and discussions. We provide and present clinical collaboration with specialists from a wide array of disciplines. Each specialist is governed by their professional scope of practice and their jurisdiction of licensure. We use functional health & wellness protocols to treat and support care for the injuries or disorders of the musculoskeletal system. Our videos, posts, topics, subjects, and insights cover clinical matters, issues, and topics that relate to and support, directly or indirectly, our clinical scope of practice.* Our office has made a reasonable attempt to provide supportive citations and has identified the relevant research study or studies supporting our posts. We provide copies of supporting research studies available to regulatory boards and the public upon request.

We understand that we cover matters that require an additional explanation of how it may assist in a particular care plan or treatment protocol; therefore, to further discuss the subject matter above, please feel free to ask Dr. Alex Jimenez or contact us at 915-850-0900.

Dr. Alex Jimenez DC, MSACP, CCST, IFMCP*, CIFM*, ATN*

email: coach@elpasofunctionalmedicine.com

phone: 915-850-0900

Licensed in Texas & New Mexico *

Dr. Alex Jimenez DC, MSACP, CIFM, IFMCP, ATN, CCST
My Digital Business Card

Post Disclaimer

Professional Scope of Practice *

The information herein on "Frailty and Locomotive Syndrome: Phase Angle Detection" is not intended to replace a one-on-one relationship with a qualified health care professional or licensed physician and is not medical advice. We encourage you to make healthcare decisions based on your research and partnership with a qualified healthcare professional.

Blog Information & Scope Discussions

Our information scope is limited to Chiropractic, musculoskeletal, acupuncture, physical medicines, wellness, contributing etiological viscerosomatic disturbances within clinical presentations, associated somatovisceral reflex clinical dynamics, subluxation complexes, sensitive health issues, and/or functional medicine articles, topics, and discussions.

We provide and present clinical collaboration with specialists from various disciplines. Each specialist is governed by their professional scope of practice and their jurisdiction of licensure. We use functional health & wellness protocols to treat and support care for the injuries or disorders of the musculoskeletal system.

Our videos, posts, topics, subjects, and insights cover clinical matters, issues, and topics that relate to and directly or indirectly support our clinical scope of practice.*

Our office has reasonably attempted to provide supportive citations and has identified the relevant research studies supporting our posts. We provide copies of supporting research studies available to regulatory boards and the public upon request.

We understand that we cover matters that require an additional explanation of how it may assist in a particular care plan or treatment protocol; therefore, to further discuss the subject matter above, please feel free to ask Dr. Alex Jimenez, DC, or contact us at 915-850-0900.

We are here to help you and your family.

Blessings

Dr. Alex Jimenez DC, MSACP, RN*, CCST, IFMCP*, CIFM*, ATN*

email: coach@elpasofunctionalmedicine.com

Licensed as a Doctor of Chiropractic (DC) in Texas & New Mexico*
Texas DC License # TX5807, New Mexico DC License # NM-DC2182

Licensed as a Registered Nurse (RN*) in Florida
Florida License RN License # RN9617241 (Control No. 3558029)
Compact Status: Multi-State License: Authorized to Practice in 40 States*

Presently Matriculated: ICHS: MSN* FNP (Family Nurse Practitioner Program)

Dr. Alex Jimenez DC, MSACP, RN* CIFM*, IFMCP*, ATN*, CCST
My Digital Business Card