PAT105 Wk 2

Ch 3.

• Back and forth motion allows waves of sound (energy) to travel

• The human body is made of different mediums that allow sound to propagate

• We see through liquids and solids better

• the average speed sound travels through soft tissue is 1540 m/s

• Boethius made pebble theory which visualizes sound waves traveling like a pebble dropped in water. Da vinci also assumed sound traveled in waves

• father of acoustics maron mersenne

• acoustics- the scientific study of sound

• Robert Boyle recognized there must be a medium through which sound can travel in order for it to propagate. His research laid the groundwork for coupling gel.

• coupling agent- ex. gel is something for the sound to travel through. can also use water.

• bone is too dense for sound to travel through, gas is too spacious. medium needs to be a solid or a liquid

• father of ultrasound abbe lazarro spallanzani studied how bats use sound waves to detect prey

• christian johann doppler discovered that the pitch of a sound wave varies if the source of the sound was moving (the doppler effect)

• we use doppler for veins or arteries to tell how fast blood is moving and in which direction the blood is moving

• long wavelength low frequency, short sound wave high frequency

• the currie brothers recognized the piezoelectric effect- the process whereby a material such as a crystal or element within a transducer generates electricity and changes shape with the application of pressure

• the crystals in a transducer produce ultrasound waves

• during wwi ultrasound was used to detect submarines using a hydrophone

• Floyd Firestone used this to develop the reflectoscope, which was the technique first used in medicine

• the first application of ultrasound in medical diagnosis was in 1941

• Karl Dussik used ultrasound the first time to image lateral ventricles in the brain

• sound must be pulsed or allowed to be alternated rapidly on and off so the transducer can listen for the echo

an early attempt demonstrated reflections from a gallstone

IMAGING MODES:

• A-mode (amplitude mode)- represents the depth of the returning echo on the x axis and the strength of the reflector on the y axis. used in echocardiography and opthalmalic ultrasound

• B-mode (brightness mode)- displays the returning ultrasound signal as a dot on the monitor. The dot has varying degrees of brightness based on the strength of the returning echo. Is also referred to as grey-scale sonography

• M-mode (motion mode)- documents the movement of structures in the body along a single scan line. The y axis shows depth and x axis shows time. Used to demonstrate fetal heart rate. Able to use real time scanners.

• Robert Rushmer established varying uses of continuous wave doppler and spectral analysis in 1963

• CW transducers combine an element continuously sending waves with one that continuously listens for the return signal. There have been several advancements such as pulsed wave doppler, duplex imaging, color doppler imaging, and triplex imaging, the combination of b-mode spectral and color doppler

• any flow above the baseline is considered flowing toward the transducer, any flow away from the baseline is considered flowing away from the transducer.

• color doppler can give you flow direction, power doppler cannot. it can only indicate that flow is there.

• tissue harmonic imaging- allows you to get rid of artifactual frequencies that are generated by differing human body tissues.

• 3D imaging allows one to see width height and depth within an image. useful in obsetrics for clear visualization. Also used in breast, vascular, gynecologic, and abdominal sonographic imaging. Computers make our 2D images 3D for us

• 4D imaging offers real time imaging in 3D. the fourth dimension is time. Keepsake imaging centers exploit this for economic and entertainment purposes. An official statement calls for only certified professionals to do this to maintain patient care. NON DIAGNOSTIC

Specialties in Sonography

• Abdominal- must appreciate relevant normal abdominal anatomy and pathology of each organ and system within the abdomen and small parts. Cannot have people eat drink or smoke before imaging. Transducer frequency ranges 2 to 5 MHz for general imaging. CW and PW Doppler are often utilized to access vascular structures and can be ordered for numerous reasons. NPO- nothing by mouth for 6+ hours.

  • Small parts- thyroid, scrotum, and prostate gland

• Breast- used in conjuction with mammography. Performed with high resolution real time array transducer with a frequency of at least 10MHz.

  • Breast is visualized like the face of a clock.

  • Imaging is performed in transverse and longitudinal planes or radial and antiradial planes

• Neuro and Pediatric Sonography- brain imaging newborn infant spine imaging and intraoperative sonography

• Musculoskeletal sonography- scanning bones, joints, orthopedics, search for foreign bodies.

• Gynecologic- patient prep includes a full bladder. Uses 3.5+ Mhz transabdominally. Transvaginally at 5+ MHz. Transvaginal doesnt require full bladder. Transvag is better for resolution of organs and structures. Sonohysterography- inject sterile saline to image polyps.

• OB- Fetal and maternal abnormality scanning. Used to confirm intrauterine pregnancy, vaginal bleeding, ectopic pregnancy, screening, and routine assessments in the first trimester. Routine and detailed anatomy survey, amniocentesis, chorionic villus sampling, and cordocentesis, and fetal echo in second and third trimesters

• Vascular- imaging of the arterial and venous systems of the arms and legs and intracranial and extracranial vessels. 5 to 7 MHz transducers.

• Echo- imaging the heart.

• Therapeutic- used to increase blood supplies to areas of healing. focused ultrasound

• elastography- assesses the stiffness of something

• automated ultrasound- steered by a computer system

• fast ultrasound (focused assessment)- trauma in ER when a physician uses a scanner to diagnose trauma such as internal bleeding.

Ch 4

• Sonography offers numerous avenues to “make your mark” and leave a legacy of excellence.

• Continuous learning is mandatory; healthcare—and sonographic technology—evolve rapidly.

The Professional Environment

• Composed of three regulatory / quality pillars:

  • Academic accreditation (program level)

  • National certification (individual level)

  • Laboratory accreditation (facility level)

• Optional—but highly advantageous—membership in professional organizations:

  • Keeps skills current

  • Provides networking and leadership opportunities

  • Prepares practitioners for shifts in healthcare policy, technology, and reimbursement.

Academic Accreditation

• Definition: external assessment of program quality, resources, outcomes.

• U.S. accrediting body: Commission on Accreditation of Allied Health Education Programs (CAAHEP).

• JRCDMS recommends program accredidation. Go through JRCDMS first.

• Hallmarks of accreditation:

  • Rigorous document review

  • On-site evaluation (students may be interviewed).

• Award periods: $5$ or $10$ years.

• Signals to employers that graduates meet high entry-level competency standards.

Professional Organizations

• Purposes: disseminate information, shape policy, foster professional identity, offer CME.

• Levels: state, regional, national.

• Key societies:

  • Society of Diagnostic Medical Sonography (SDMS) — hosts a national meeting, CME credits, multi-tier membership.

  • Society of Vascular Ultrasound (SVU).

  • American Society of Echocardiography (ASE).

• Participation benefits: speaking opportunities, committee service, policy advocacy, discounts on education.

National Certification

• Primary certifying agency: American Registry for Diagnostic Medical Sonography (ARDMS).

• Core credentials:

  • Registered Diagnostic Medical Sonographer (RDMS)

  • Registered Diagnostic Cardiac Sonographer (RDCS)

  • Registered Vascular Technologist (RVT)

• Universal requirement: pass Sonography Principles & Instrumentation (SPI) + a specialty exam.

• Exams may be attempted while enrolled, but credentials are released only after graduation.

• Certifications are portable across U.S. state lines; some states may still mandate a state license.

Common ARDMS Pathways & Specialties

• RDCS specialty menu: Adult Echo (AE), Pediatric Echo (PE), Fetal Echo (FE).

• RDMS specialty menu: Abdomen (AB), Obstetrics/Gynecology (OB), Breast (BR), Pediatric Sonography (PS), Fetal Echo (FE).

• RVT specialty: Vascular Technology (VT).

Alternative Certifying Bodies

• Cardiovascular Credentialing International (CCI) — cardiac & vascular tracks.

• American Registry of Radiologic Technologists (ARRT) — sonography module.

Maintaining Certification

• CME requirement (ARDMS): $30$ approved credits every $3$ years post-initial certification.

• Acceptable CME sources:

  • Conferences, symposia

  • Additional credentialing exams

  • Publication of peer-reviewed research

• Credential validity cycle: certified for life until that is changed

Laboratory Accreditation

• Vascular: Intersocietal Commission for the Accreditation of Vascular Laboratories (ICAVL).

• Echocardiography: Intersocietal Accreditation Commission of Echocardiography (IAC Echo).

• General ultrasound: American College of Radiology (ACR).

• Benefits: elevates quality, ensures uniform protocols, boosts patient confidence & payer recognition.

Leadership Concepts in Sonography

• Leadership = influencing thoughts, behaviors, or development of others toward a goal.

• In modern healthcare, patients are customers; satisfaction interfaces directly with reimbursement (e.g., Medicare surveys).

• Ethical, compassionate scanning automatically positions the sonographer as a leader at the bedside.

Servantship Essentials (Patient-Centric Behaviors)

• Smile & convey warmth.

• Guard patient dignity at all times.

• Respond promptly to voiced & unvoiced needs.

• Respect uniqueness (age, race, gender identity, emotional state).

• Advocate for rights & safety; speak up against mistreatment.

• Exhibit unwavering professionalism; close each encounter with gratitude & reassurance.

Leadership Styles & Followership

• Autocratic: directive, efficient, but may suppress creativity.

• Transactional: reward–punishment contract; clarifies expectations but limited inspiration.

• Transformational: vision-driven, high emotional intelligence (EI), nurtures devotion, communication, risk-taking, and individual growth; couples inspiration with tangible rewards.

• Servant leadership: leader prioritizes others’ needs, facilitates autonomy, and maximizes collective potential.

• Trust & EI are linchpins; 360-degree feedback (leader ↔ follower evaluations) reinforces trust.

Satterlee’s 10 Rules for Effective Followership

1. Support leaders during organizational change—even when changes are unpopular.

2. Voice disagreements privately, sparingly, and constructively.

3. Use initiative; explain rationale when independent decisions need clarification.

4. Accept leadership roles when offered.

5. Maintain absolute honesty.

6. Anticipate conflict & change; remain adaptable.

7. Share ideas and be ready to spearhead them.

8. Publicize colleagues’ successes; avoid dwelling on uncontrollable problems.

9. If you observe a problem, fix it proactively.

10. Deliver beyond an “honest day’s work.”

Followership Styles

• Resourceful: meet minimum expectations; job retention is primary motivator.

• Individualistic: vocal but dismissed due to persistent negativity.

• Implementer: obeys without question; avoids challenging leadership.

• Partner: owns personal & leader outcomes; collaborative, proactive ally.

Core Career Roles in Sonography

Staff Sonographer (Entry-Level)

• Front-line examiner in hospitals, clinics, physician offices.

• May take call (nights/weekends) & participate in research.

• Despite entry status, can still influence profession via continuous development.

Professional Development Tactics (Table 4-7)

• Pursue additional specialties & certifications.

• Publish case reports / journal articles.

• Deliver local lectures & trainings.

• Join societies; seek leadership roles.

• Teach & mentor students.

• Advance formal education (Associate ➜ Bachelor ➜ Master).

Advanced Practice Sonographer

• SDMS vision (since 1996): mid-level “Ultrasound Practitioner.”

• Functions: perform & interpret exams in primary/specialty care, act as liaison between interpreting physician & staff.

• Ultrasound Radiologist Assistant: bridges radiologists and sonographers; refines preliminary reports, teaches residents.

Management / Director Roles

• Responsibilities: scheduling, supply chain, budgeting, policy enforcement, meeting attendance, physician coordination.

• Distinction: management is task-oriented; leadership is influence-oriented—combination yields upward mobility.

Sonography Educator

• Dual-setting educator: classroom + clinical.

• Prerequisites: prior clinical experience & relevant certification(s).

• Traits: insatiable curiosity, passion for ultrasound, drive to shape future workforce.

Additional Career Pathways

• Travel Sonographer: hired by staffing agencies; domestic/international assignments.

• Ultrasound Consultant: guides facilities through accreditation, QA program design.

• Sales & Applications Specialist: employed by manufacturers; requires multi-credential expertise & deep system knowledge.

• Sonographer Entrepreneur: owns/partners in businesses focused on equipment sales, training, mobile services, or software.

Career Establishment

Job Search Strategies

• Be open to relocation or interim roles that provide experience.

• Use online job boards, hospital/clinic HR portals, and professional society listings.

• Leverage school career services and—most powerfully—word of mouth.

• Cultivate relationships with clinical mentors and managers.

Resume & Social Networking

• Tailor résumé to each vacancy; highlight relevant credentials & specialties.

• Utilize free résumé-scoring tools for optimization.

• Pro-active networking (in-person + digital) accelerates exposure to hiring managers.

• Maintain professional online presence; monitor privacy & content.

Interview Preparation

• Master your résumé chronology; anticipate probes (“Tell me about yourself”).

• Sit forward, show genuine interest, pause thoughtfully before answering.

• Post-interview etiquette: send a timely thank-you note/email.

• Weakness framing: identify a real limitation, then pivot to how you mitigate it—demonstrates self-awareness & teachability.

• Perform a structured self-inventory of strengths & weaknesses; refusal to admit flaws signals resistance to growth.

Summary & Big-Picture Takeaways

• Clinical competence is priority #1 in school, but parallel cultivation of professional networks is priceless.

• Numerous societies, credentials, and accreditations create an ecosystem for lifelong development.

• Career progression (staff ➜ advanced practice ➜ educator / manager / entrepreneur) hinges on ongoing education, leadership aptitude, and proactive opportunities.

• Ultimately, excellence in sonography combines technical mastery, compassionate servantship, and collaborative leadership—shaping both patient outcomes and the profession’s future.

Ch 5

Definition & Scope of WRMSDs

• WRMSDs = occupationally acquired/aggravated injuries to muscles, tendons, ligaments, or cartilage caused by repetitive use.

• Healthcare workers experience high incidence; occupational injury is the main reason for long-term absences.

• Average onset of pain for a sonographer: $5$ years into the career.

• Research shows between $80\%$ and $90\%$ of sonographers scan in pain.

Most Common WRMSD Sites in Sonographers

• Shoulder – $84\%$ of practitioners report issues.

• Neck – $83\%$.

• Wrist – $61\%$.

• Back – $58\%$.

• Hands – $56\%$.

• Injuries result from cyclical stress/tension on specific muscle–nerve–tendon–ligament groups.

Ergonomics (Science & Rationale)

• Ergonomics = scientific design of tools/equipment to fit human anatomy & work flow. know table 5-2

• Proper ergonomic design reduces repetitive stress, static loading, and awkward postures.

Body Mechanics Essentials

• Center of gravity when standing lies at pelvic midpoint; keeping it aligned safeguards the spine.

• Postural-support devices (chairs, cushions, braces) help maintain alignment.

• Deviation may be necessary for patient care—request assistance rather than compromise posture.

Personal & Environmental WRMSD Risk Factors

• Posture & body positioning.

• Repetitive motions plus force/pressure.

• Room & equipment design.

• Job/task design & workload.

• Additional pre-disposing physical factors; specialty-specific risks.

Posture & Body Positioning Principles

• Correct posture = balanced alignment of all body parts; extremities held neutrally.

• Poor posture can feel "easier" due to habitual ligament & muscle laxity.

• Awkward, repeated arm abduction/adduction induces spasms & WRMSDs.

• Good scanning technique and consistent practice embed safe habits.

• Illustration recap: Figure A = poor sitting; Figure B = good sitting.

Safe Lifting & Moving (Mnemonic: ALE)

• A (Lift Appraisal): Plan, ask for help.

• L (Base Length): Stand close, widen support base.

• E (KnEes): Bend knees, keep back straight.

• Supplement: Tighten core; lift with leg muscles.

Arm Abduction & Adduction Guidelines

• Abduction = arm away from midline; adduction = toward midline.

• Sustained reach beyond $30^{\circ}$ causes muscle fatigue & injury.

• Photo example shows extreme abduction → shoulder strain risk.

Preventative Pre-Examination Workflow (WRMSD Mitigation)

1. Gather all supplies (gel, towels, positioning aids) before scanning.

2. Sit in a swivel chair with lumbar & foot support.

3. Align machine directly in front; eyes level with monitor top; keyboard within easy reach.

4. Raise exam table—avoid leaning, reaching, bending.

5. Place patient as close as possible to minimize arm abduction & wrist deviation.

6. Add arm-support cushion or rest arm lightly on patient (with permission).

7. Re-adjust ergonomics whenever patient position changes (e.g., stand when patient rolls left).

• Cushion utilization photo exemplifies proper support.

Repetitive Motion, Force & Pressure

• Fine transducer manipulation recruits many small muscle groups.

• Greater applied force → more effort → decreased local blood flow → fatigue.

• Static posture + probe pressure → static muscle loading.

• Counter-measures: Pair exertion periods with equal rest; vary tasks throughout the day.

Room Design Considerations

• Standard left-bed/right-arm layout entrenches repetitive motion.

• Ambidextrous room setups reduce overuse injuries.

• Environmental factors (lighting, air quality, flooring) influence eye strain & fatigue.

• Students: alternate sitting/standing views; take short walks/breaks.

Equipment Design Advances

• Modern ergonomic ultrasound units cost far less than treating WRMSDs.

• Machines/transducers now lighter & more maneuverable.

• Multiple probe sizes allow selection for comfort; avoid models causing discomfort.

• Sonographers should trial equipment and recommend ergonomic tweaks before purchase.

Clinical Tips for Students

• Arrive well-rested; wear supportive clothing/shoes.

• Vary observational posture & scan positions; maintain good alignment.

• Request brief scanning turns to practice neutral posture.

• Stretch & walk between cases; leave department during breaks.

• Report persistent pain to clinical supervisor/program faculty promptly.

Altering Scanning Positions

• Examples (all maintain neutral posture):

  • A & C = scanning arm abduction ≤ $30^{\circ}$.

  • B & D = non-scanning arm close to torso, elbow flexed $90^{\circ}$.

Job Design Strategies

• Supportive scheduling framework; incorporate recurrent breaks.

• Rotate examination types to diversify muscle use.

• know table 5-6

Underlying Predisposing Conditions

• Previous trauma, diabetes, chronic fatigue, obesity.

• Smoking, excessive alcohol, rheumatoid arthritis, Lyme disease.

• Disorders with fluid retention; generally unhealthy lifestyles.

Inflammatory Diseases & Nerve Entrapment

• Generic symptoms: inflammation, swelling, numbness, spasms, burning, “pins-and-needles”, stabbing pain, sensory loss.

• Early recognition critical; many delay care until advanced.

• Common pathologies:

  • Tendinitis (tendon inflammation).

  • Tenosynovitis (sheath inflammation).

  • Epicondylitis (periosteal inflammation at distal humerus).

  • Bursitis (bursal inflammation).

  • Pinched nerves (compression/stretching of nerve tissue).

• Frequent entrapment sites: elbow, wrist, neck.

• Named syndromes: carpal tunnel, cubital tunnel, thoracic outlet.

• Specific examples: "tennis elbow" (degenerative lateral epicondylitis), shoulder bursitis & tendonitis.

• Warning signs (Table 5-7):

  • Tingling hands/fingers, habitual self-massage, persistent neck/shoulder ache.

  • Nocturnal pain/tingling, grip weakness, headaches, >$24$-hour lingering pain, etc.

Best-Practice Ergonomic Interventions for Students

• Prevention beats treatment → combine ergonomic fixes with conditioning/stretching.

• Shoulder & Elbow:

  • Abduction ≤ $30^{\circ}$.

  • Keep patient close; use cable support brace or shoulder assist.

  • Non-scanning elbow flexed $90^{\circ}$, upper arm relaxed.

• Maintain horizontal shoulders; balance weight evenly when seated.

• Avoid shoulder elevation, forward hunching, weight-shift onto one hip.

• Cord management: cable support braces (e.g., Sound Ergonomics) reduce wrist drag.

• Wrist care:

  • Keep wrist neutral; repetitive gripping decreases strength.

  • Treat ganglion cysts promptly; consider wrist braces.

• Neck & Back:

  • Minimize twisting; position machine near table, swivel monitor.

  • Stand with straight spine, even weight on both legs.

  • Postural supports alleviate strain; insert micro-breaks.

• Thoracic Outlet Syndrome:

  • Caused by head tilt, shoulder hunch, overhead reaching.

  • Produces finger/hand/wrist pain via brachial plexus compression.

• Lower Extremities:

  • Orthotic inserts/footwear alleviate plantar fasciitis & tarsal tunnel syndrome.

General Treatment & Lifestyle Impact

• First-line: rest + anti-inflammatory meds.

• Adjunct therapies: chiropractic, massage, acupuncture, fitness/athletics, trigger-point injections, herbal regimens, physiotherapy.

• Partner with qualified physician; address symptoms early to protect career & quality of life.

Summary Recap

• WRMSDs stem from repetitive occupational strain on musculoskeletal structures.

• Primary sonographer injury sites: shoulder, neck, wrist, back, hands.

• Early awareness, ergonomic vigilance, and immediate posture corrections enable long, pain-free careers in sonography.