HIV Disease: Clinical Implications for PT Flashcards
Globally…. # of people who have died of AIDS since start of pandemic
30,000,000
HIV Prevalence in U.S.
1 in every _______ persons is HIV+
250
Leading cause of death in persons w/ Advanced HIV disease (AIDS)
Opportunistic Infx
Which is Contraindicated in a pt w/ Acute Inflammatory Myopathy?
PREs
Sandy has HIV and Acute Inflammatory Myopathy. You expect to see:
Diffuse myalgia and PROXIMAL weakness*
Trunk, shoulder/pelvic girdles
Which of the following opportunistic infx’s is the MOST RARE in people w/ HIV?
Progressive Multifocal Leukoencephalopathy
HIV Hx
- 40s or 50s→ Cameroon, Africa- wild chimpanzees, man either bit or exposed butchering monkey
- Mid 1970s→ rare illnesses/infx in gay men
- 5 young men tx for biopsy confirmed P. carinii pneumonia. 2 pts died. All 5 had lab confirmed prev or current CMV infx and candida mucosal infx
AIDS term coined
1982
FIRST antiretroviral (ART) drug for AIDS
AZT
Routes to a cure
“Functional Cure” vs. “Complete eradication of virus”
- Conventional cure difficult
-
Sustained virologic remission→ “Functional cure”
- w/out having to continue lifelong ART meds maybe more realistic
Route to a cure:
Currently under study
- Therapeutic vaccine
-
Antibody therapy→ immune system enhancement
- “Elite controllers”→ have certain killer T cells that keep virus suppressed
- “Shock and Kill”→ chemo to draw HIV out of reservoir sites and kill it
- Gene therapy→ mod of receptors (CCR5) on CD4s so HIV cannot get in
- Gene therapy→ molecular scissors to “snip out” HIV DNA from host cells
- Combo→ enhance immune system + modify CCR5 receptors + destroy latent reservoirs
Trends in Annual Age-Adjusted Rate of Death w/ HIV Disease as the Underlying Cause
DROP in rate 1995….why?
Triple Combo Tx
HIV Myths + Facts
Myth: HIV is an IV-drug abusers disease or a gay male’s disease
FACTS?
- FACT:
-
HIV infects people all walks of life. Does NOT discriminate
-
all races/genders/sex preferences
- hetero→ 32% cases
-
all races/genders/sex preferences
- any age, socioeco stat
-
HIV infects people all walks of life. Does NOT discriminate
- FACT:
- Men who have sex w/ men and IV-drug users are at a higher risk for infx (higher # exposures)
HIV Myths + Facts
Myth: HIV can be cured w/ new meds; its not so serious now
FACTS?
- FACT:
- There is NO CURE for HIV; once infected, HIV cannot be eradicated from body
- FACT:
-
ART drugs can greatly INC life-expect, BUT…
- SEs/toxicities
- Near perfect adherence=critical to success
- marginalized or underinsured indiv’s have limtd access
-
ART drugs can greatly INC life-expect, BUT…
1 in ________ Am’s is HIV+
250
Why don’t we all say YES to knowing someone w/ HIV?
- Stigma/reluctance to share
- Person you know hasn’t told you
- Person doesn’t know
- 14% of HIV+ Am’s are not aware of HIV stats
Pt w/ prob NOT related to HIV, but is HIV+
referred for tx of MSK prob
Med Hx includes HIV+
SAME exam and intervent as any patient: Keep in mind
S/S of possible comorbs, Monitor VS, ART SEs
Pt w/ problem related to HIV disease, comorbs, or ART SEs
Exam of and interventions for impairs, functional limits, or disability
-
Example:
- Balance deficits and gait disturbs due to adv. peripheral neuropathy and CMV
- Knee pain, impaired ROM and impaired mm perform due to HIV related arthritis
Stigma assocd w/ HIV….WHY?
Ignorance/misperceptions, irrational/puritanical judgements, stereotyping, scape-goat/blame-game, bigotry, homophobia
How can I REDUCE STIGMA?
- Discuss HIV openly
- Educate!
- Non-judgemental
- Resources
- local testing and counseling centers
- Info resources
>35 mil living w/ HIV/AIDS
Only 53% have access to ART Meds !!!!
Hispanics→ 27% of new infx’s
Blacks/Af Am’s→ 44% new infx’s
WHY?
- Comm’s of color:
- greater prevalence HIV→ community incubators
- Higher poverty
- limtd access
- Higher rates of undx’d STD→ inc risk HIV
- Higher rates incarceration
- More stigma/homophobia
HIV in “Golden Years” aka older individuals
Prevalence inc’ing indiv’s >50yo
- Incd longevity due to ART: PWHIV living longer
- New Infx’s: 10% of new infx’s in indivs >55yo
Prognosis is ______ in Older individuals
WORSE!!!!!
Prognosis is WORSE in older individuals
- Many elderly pts do not receive HIV Dx until they have full blown disease and thus have WORSE prognosis
- More HIV and non-HIV related comorbs in older pts
- Immunosenescence→ immune system dysf.
- Psychosoc, nutritional, lifestyle factors
Delayed Dx in older individuals
BIG REASON FOR THIS???
***MANY early sx’s of HIV mimic common presentations of other dis’s or may be attributed to “getting old”
- Fatigue, wt loss, neuropsycho changes, chronic pain, depression/social iso.
IMPORTANT! KNOW THIS!!!
Older pts w/ HIV have WORSE prognosis because:
- Greater chance of delayed dx
- Presence of multimorbidity
- Immunosenescence
HIV aka
Human Immunodeficiency (retro) Virus
HIV Disease
Cause and what is it?
- Cause→ Infx w/ HIV
-
Suppression of immune system
- INCd risk for life-threatening opportunistic infx’s
HIV Stages
AASA****
W/OUT ART
- A: Acute infx
- A: Asymptomatic HIV Dis.
- S: Symptomatic HIV Dis.
-
A: Advanced HIV Dis./AIDS
- “Acquired Immunodeficiency Syndrome”
HIV Replication takes how long?
2.6d
HIV Replication Steps:
youtube.com/watch?v=RO8MP3wMvqg
Remember steps from pic (see below)
- Free virus
- Binding and Fusion
- Infection
- Reverse Transcription
- Integration
- Transcription (Copies)
- Assembly
- Budding
- Maturation
HIV replicates in, and eventually kills:
CD4 cells***
Viral replication in a CD4 cell involves all of the following enzymes
- Transcriptase
- Integrase
- Protease
NOTE: does NOT involve creatine phosphokinase (from pollev.)
#1 HIV Transmission Route:
Sexual Contact
HIV Transmission routes
- #1: Sexual contact
- Sharing needles (IV drug use)
- Blood to blood (or blood derived fluid) contact
-
Mother→ child
- pregnancy, delivery, breast feeding
Fluids that transmit HIV
- Semen→ unprotected sex
- Vaginal fluid→ unprotected sex
- Blood
- Breast milk
- Other body fluids w/ blood
YOU CANNOT GET HIV FROM HUGGING OR SHAKING HANDS W/ PERSON W/ ADVANCED HIV DISEASE (AIDS) !!!!
Unless open wound or blood→blood but in general….
GLOBALLY…..#1 Axis of Transmission for HIV
Heterosexual sex
Heterosexual sex is __________
Globally #1 transmission route of HIV
All are routes of transmission for HIV
Sex, blood-blood, mother→baby during childbirth
NOT a route of HIV transmission?
Inhalation of airborne particles
Why do Untreated individuals (NOT ON ART) die from HIV?
Opportunistic infx’s
Why do Treated Indiv’s (on ART) die from HIV?
- Comps/Comorbs related to med toxicities and/or chronic infx
- Poor adherence to ART→ disease progresses
Treated indiv’s ON ART can die from HIV mostly from comps/comorbs or poor adherence to ART
BUT….
MOST indiv’s successfuly treated w/ ART expected to live out natural lifespan
Educate/Communicate
- talk about sex
- safe sex
- IV drug use (sterile, no share)
Talk about HIV Prevention:
- Pre-Exposure Prophylaxis (PrEP)
-
Limit exposure:
- abstinence
- mutual monogamy
- reduce # sexual pahtnas
PrEP types:
- Truvada
- Descovy→ safer than Truvada for people w/ OP or kidney issues
PrEP MOST effective used w/
condoms
“Prevention” as a Cure
- 14% of people who do not know they’re HIV+ → 30% of new infx’s
- Those who KNOW HIV+ but not successfully tx’d (have a viral load)→ 60% new infx’s
- IF we could get them all treated (viral load to undetectable) → new infx’s DROP over 90%!
HIV prevention:
Condoms, communication, PrEP
HIV Testing recs:
Routine→ ALL, annually for high risk
ALL pregnant women (early as poss.)
HIV Testing
Rapid Testing
- Saliva anti-body tests (mean time 4wks)
- Blood→ antibodies AND virus
- KNOW THAT BLOOD TESTS CHECK FOR VIRUS ITSELF!
HIV Testing
Antibody Tests
ONLY tests negative until point of “seroconversion)→ mean is 26d
HIV Testing
Tests detecting actual virus
POSITIVE SOONER than antibody tests → 1wk to 6wks
HIV Testing
Antibody vs Virus detection
Which is positive soone?
Virus detection!!!!
+ Rapid test results
Confirm @ Western blot test to detect virus
After getting infected w/ HIV
HIV test will be positive
W/in a few wks
Why test for HIV?
2 reasons:
-
Seek medical care and initiate ART earlier*
-
ART:
- reduces risk of progression, dec’s timing living w/ high viral load,
- Pregnancy→ reduce risk mother→ newborn
-
ART:
-
Prevent transmission
- Transm rates from unaware is 3x higher
HIV+ people UNAWARE they have HIV
14%
Stages of HIV Dis. in an Untreated Indiv.
REMEMBER AASA
-
Acute:
- A: Acute
-
Chronic
- A: Asymptomatic/Clinical latency
- S: Symptomatic
- A: Advanced HIV Disease (AIDS)
When you see Advanced HIV Disease think….
AIDS
Most important parts of the Acute Infx stage:
-
HIGH viral loads, HIGHLY contagious***
- mono sx’s, flu-like sx’s after 1-6wk incubtion
- HIV test negative until:
- Antibody tests→ 2wks-6mos (26d)
- Viral detection tests→ 1-6wks
Chronic Infx Stage
A: Asymptomatic HIV Disease (Clinical Latency)
- 1-20 yrs, + antibody test
- CD4 count >500 cells/mm3
- Viral load @ set point, BUT dynamic process of viral replication is occurring→ esp lymph tissue
Chronic Infx Stage:
Early S: Symptomatic HIV Dis.
- Few mos→ 5yrs
-
CD4 cells decline:
- Count @ 200-500
- virus destroys immune/neuroglial cells
- opportunistic infx’s risk
- *persisten lymphodenopathy
A: Advanced HIV Disease (AIDS)
MUST present w/ one or more of the following:
- Opportunistic Infx
- LESS THAN 200 CD4 cells
- HIV dementia OR HIV wasting syndrome
Untreated indivs typ progress to AIDS w/in ________ of infx
w/in 10 yrs
Leading cause of death→ 2* Infx’s
HIV wasting seen in Advanced HIV Dis./AIDS
what does this look like?
-
Signs:
- INvoluntary loss of >10% BW
- Chronic diarrhea
- Weakness/fever
Sx’s of Advanced HIV Dis. (AIDS)
see pics
NOTE: Kaposis Sarcoma→ red, brown, pink or purple blotches on skin*
Viral Load and CD4 Count over time in UNTREATED INDIV’S
Nat’l progression of disease if NOT ON ART
SEE PICS
Stages of Asymptomatic HIV Dis (Clinical Latency) lasts anywhere from:
1-20yrs
Indicator of Adv HIV Dis. (AIDS) is CD4 count BELOW
250
Lab tracking of HIV Dis.
-
CD4+ counts
- HIV neg.→ healthy immune system: Norm=700-1100 cells/mm3
- HIV+→ precarious decline over time if not on ART
- CD4:CD8 ratio (CD4 %)
- Viral Load→ strength of virus in body
Markers of HIV Dis.
Goals of ART
EARLIER THE BETTER!!!!!!!!!
REMEMBER THIS!!!!
Markers of HIV Dis.
- Lab values assess effectiveness of ART
- ART Goals: earlier the better*
- UNdetectable viral load
- Improve CD4 # and CD4/CD8 ratio
- ART Goals: earlier the better*
- Lab vals DO NOT predict phys impair, functional stat, or disability***
BIG Goal of ART
UNDETECTABLE VIRAL LOAD!!!!
*NOTE: does NOT mean “cured”
Goals of ART
Know bold
-
Maximally and durably suppress HIV viral load
- GOAL→ UNDETECTABLE viral load (<20copies/mL)
- stop progression
- reduce HIV-related morbidiy/mortality
- restore/preserve immunologic function
- prevent transmission
- improve QoL
Why can’t HIV be eradicated from body?
It hides. It waits.
“Sanctuary sites”/Reservoirs of HIV
- Cellular
- latent CD4’s, macrophages, follicular dendritic cells
- Anatomical
- CNS
- Lymph nodes
A person living w/ HIV who has an UNDETECTABLE VIRAL LOAD DOES NOT TRANSMIT THE VIRUS TO THEIR PARTNERS*******
U=U
Undetectable=Untransmittable
If HIV can be treated w/ one pill/1x/day, why do 44% of people w/ HIV in US still have detectable lvls of virus?
Virus, Patients, Drugs
See pics
Adherence issues to ART may be MORE pronounced in _________ and ________
Adolescents and older indiv’s
LOW adherence to ART
Cascade of events?
- Virus starts replicating/mutating→ accel’d resistance to ART drugs pt was on
- Virological failure of salvage regimes
- Progression of HIV dis.
HIV+ pts on ART
Tech’s to use
see pics
Drug interactions in the process of HIV invading CD4 cells
Know the drug option “Functions” @ ea. phase!!!
-
Entry of HIV
- Entry Inhibitors work here*
-
RNA release
- NON-Nucleoside Reverse Transcriptase Inhibitors work here*
-
Reverse transcriptase (trying to release DNA)
- Nucleoside/Nucleotide Reverse Transcriptase Inhibitors work here*
-
Trying to integrate into Nucleus
- Integrase Inhibitors work here*
- Protease (“Budding” off phase)
- Protease Inhibitors work here*
LABEL THIS PICTURE!!!!
What works where?
- Entry Inhibitors
- Non-Nucleoside Reverse Transcriptase Inhibitors
- Nucleoside/Nucleotide Reverse Transcriptase Inhibitors
- Integrase Inhibitors
- Protease Inhibitors
Current ART Guidelines:
When to begin:
Just know that answer should always be ASAP after + dx ***
- ASAP after +Dx, sooner the better
-
ALWAYS begin if:
- any AIDS defining illness (opportunistic infx; dementia) or HIV-related comorbs
- rapidly declining CD4 count (esp if BELOW 350 cells/mm3) and/ or high viral load (>100,000 copies/mL)
- sexually active AND/OR pregnant
FIRST TRIPLE COMBO TX
ATRIPLA
ART
Monthly injection option
Cabenuva
KNOW IT IS AN OPTION
GOAL OF ART:
UNDETECTABLE VIRAL LOAD
U=U***
Risk of HIV infx from unprotected anal sex w/ HIV+ partner NOT ON ART
HIGH!!!
Would have a higher viral load and likely to infect others via unprotected sex
HIV+ person unaware they have HIV
Risk of infx thru sex w/ HIV+ partner on ART and Undetectable viral load?
Negligible/none
U=U***
When does PT become involved?
ASAP!!!
- Gen public: health promotion
- Asymptomatic HIV Dis (Clinical Latency): fitness&wellness
- Early Symptomatic HIV Dis: mng concomitant probs, impairments/functional limits
- Advanced HIV Dis (AIDS): function/QoL, palliative
What do I do for PT for pt w/ HIV?
SAME THING YOU DO W/ ANYONE ELSE!!!
*be aware of dis. + comorbs
PT Exam for Indiv’s w/ HIV Disease
Some useful tools/outcome measures
FYI….use w/ pts!!!
see pics
Communication w/ Interdisciplinary team mbrs===CRITICAL!!!
Lab vals, phys/mental health stat, comorbs, psycho issues, progress to goals/outcomes, insurance, compliance w/ ART
Aerobic Exercise in PWHIV
Summary of findings
- NO studies show detrimental effect of immune function
- Some show inc CD4 count (@ early stage)
- improved aerobic fitness markers, psycho bennies, stress mgmt, nutritional adjustments**
PRE’s in PWHIV
Summary of findings:
- Research shows:
- improved LBM (lean body mass), inc mm girth, improved mm function, retardation of wasting, Cardiopulm bennies, improved psycho status
When you see ASYMPTOMATIC HIV DIS.
THINK……
1-20yrs AND “Clinical Latency”
Exercise for pts w/ Asymptomatic HIV Disease (Clinical Latency) 1-20yrs
- UNrestricted ex/activity
- PREs, aerobic, flex/balance, sports, recreation
- Metabolic parameters WNL
- Competitive sports OK
Exercise fo pts w/ Early Symptomatic HIV Disease (step above asympto.)
- Continue exercise
- well-designed rx
- Submax aerobic testing
- YMCA Bike Submax Test, Bruce Protocol
- Avoid intense, exhaustive
- Obtain med clearance
- IF +DSPN (distal polyneuropathy)→ foot care/shoes for WB acts
Exercise for pts w/ Advanced HIV Disease (AIDS)
- Remain phys active, respect reduced VC, VO2max, O2 pulse max
- Ex on a sx limtd basis, avoid strenuous over-training
- microtrauma/injury risk→ MSK tissue more vulnerable to injury
- Avoid occasional bouts→ have reg freq.
- Monitor/adjust program as needed***
Occupational Exposure in Healthcare Personnel
MOST COMMON???
Percutaneous injury (ex. needlestick or cut w/ sharp obj)
Occupational Exposure in HC Personnel
Risk of transmission is real, but gen VERY low
- Percutaneous injury** (MOST COMMON)
-
Contact of your mucous memb’s or non-intact skin w/ pts:
- blood (fluids, tissues), semen/vaginal secretions,
- Pot infx→ CSF, synovial, pleural, peritoneal, pericardial, amniotic
- NOT infx (unless bloody)→ feces, nasal, saliva, sputum, sweat/tears/urine, vomit)
- Bites
- Direct contact to conc’d virus in lab
What do I do if i get a pts blood on my intact skin?
Stabilize pt
Wash off w/ soap/water
Do NOT worry!
What should I do if i get a pts blood in my eye or mouth (mucosal memb), or on non-intact skin, or get stuck by contaminated needle?
PEP (Post-Exposure Prophylaxis)
Rec’d when source is HIV+ or risk factors unknown
- ASAP!!! (w/in hrs after exposure)→ 81% reduction in transm. rate if initiated w/in first 72hrs after exposure***
- 4wk 28d regimen of ART
No validated cases of HIV transmission via sport
*****
Participation in sports by a student athlete who is HIV+
- Should be based on indivs general health status (NOT HIV status)
- Take steps to minimize risk of transmission of blood borne pathogens during athletic events
-
“Standard Precautions”
- Care of injured/bleeding athlete
- Care of environmental surfs.
-
“Standard Precautions”
Working w/ HIV+ pt
Standard Precautions
Awareness of comorbs/ART SEs
Systems screening/monitor VS!
CHECK OUT MG CASE STUDY!!!!
SLIDE 140 ON!!!
TEST YOURSELF FIRST THEN CHECK OUT ANSWER KEY!!!!