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MEDICAL NUTRITION THERAPY IN THE PATIENT WITH HIV/AIDS: A CASE STUDY Britt Berger, MS Sodexo DI Februar y 2014 OUTLINE History Statistics Biology Disease Course and Lifecycle Antiretroviral Therapy Medical Nutrition Therapy Case Study Patient Medical Hospital Course Nutritional Hospital Course Comments Questions HISTORY OF HIV/AIDS Late 1800s: first human infection Likely source: chimpanzees in West Africa infected with Simian Immunodeficiency Virus (SIV) Humans hunted chimpanzees for their meat and were infected by contact with their blood Virus slowly spread across Africa and to other parts of the world HIV in the US: since at least the mid- to late 1970s First cases of AIDS described in 1981 UNITED STATES STATISTICS More than 1 .1 million people are living with HIV Almost 1 in 5 are unaware of their infection Gay, bisexual, and other men who have sex with men (MSM) are most affected Blacks/African Americans face the most severe burden of HIV HIV incidence has remained relatively stable in recent years at about 50,000 new infections per year 15,529 people in the US with an AIDS diagnosis died in 2010 636,000 people in the US with an AIDS diagnosis have died since the epidemic began GLOBAL STATISTICS 33.4 million people are currently living with HIV/AIDS More than 25 million people have died of AIDS since the first cases were reported in 1981 2 million people died due to HIV/AIDS in 2008 2.7 million people were newly infected in 2008 Cases have been reported in all regions of the world Almost all those living with HIV (97%) reside in low - and middle-income countries Sub-Saharan Africa (10% of world’s population/68% of HIV) Prevention has helped reduce HIV rates in small but growing numbers New infections are believed to be on the decline BIOLOGY OF HIV HIV = retrovirus Retroviruses Contain RNA as their genetic material Use reverse transcriptase to convert RNA into DNA Replicate using the cell’s machinery Lentivirus “Slow” viruses Long period of time between initial infection and beginning of serious symptoms Many people unaware of their infection and spread the virus to others TWO IMPORTANT TERMS CD4 cells: Critical part of the immune system Type of white blood cell (fight infection) Send signals to activate the body’s immune response Normal CD4 count = 500 – 1000 As HIV infection progresses, CD4 count decreases Also known as T cells Viral load: Measurement of the amount of HIV in the blood As HIV infection progresses, viral load increases COURSE OF DISEASE HIV infection has a well documented progression If an HIV-infected person does not get treatment, HIV will eventually overwhelm their immune system When used consistently, antiretroviral therapy (ART) prevents the HIV virus from multiplying and destroying the immune system Research has shown that taking ART can help prevent the spread of HIV to others STAGE 1: ACUTE INFECTION 2 – 4 weeks after HIV infection Many, but not all, people develop flu -like symptoms Often described as “the worst flu ever” Body’s natural response to HIV infection “Acute antiretroviral syndrome” (ARS) Or “primary HIV infection” Large amounts of virus being produced High risk of transmitting HIV to sexual or drug using partners during this stage STAGE 2: CLINICAL LATENCY STAGE Period where the virus is living/developing in a person without producing symptoms No HIV-related symptoms Some people experience mild symptoms Virus continues to reproduce at low levels Clinical latency may last for several decades for people who take ART Lasts an average of 10 years for people not on ART Still possible to transmit HIV to others STAGE 3: AIDS 1. CD4 cells <200 2. Opportunistic infection Regardless of CD4 count Immune system is badly damaged Vulnerable to infections Without treatment, people typically survive 3 years Once a person has an opportunistic infection, life -expectancy without treatment falls to about 1 year If a person takes ART and maintains a low viral load, they may have a near normal lifespan and never progress to AIDS HIV LIFECYCLE AND ANTIRETROVIRAL THERAPY HIV enters the body through sexual contact, transfusions with infected blood, or by injection Virus attaches to dendritic cells (type of immune system cell) Found in the mucosal membranes that line the mouth, vagina, rectum, penis, and upper GI tract Dendritic cells transport the virus from the site of infection to the lymph nodes where HIV can infect other immune system cells The steps of the lifecycle are important to understand Medications used to control HIV infection act to interrupt the cycle STEP 1: BINDING AND FUSION HIV binds to a specific type of CD4 receptor and a co -receptor on the surface of the CD4 cell Similar to a key entering a lock Once unlocked, HIV can fuse with the host CD4 cell and release its genetic material into the cell STEP 2: REVERSE TRANSCRIPTION The enzyme reverse transcriptase changes the genetic material of the virus so it can be integrated into the host DNA STEP 3: INTEGRATION The virus’ new genetic material enters the nucleus of the CD4 cell and uses the enzyme integrase to integrate itself into the body’s own genetic material where it may “hide” and stay inactive for years STEP 4: TRANSCRIPTION STEP 5: ASSEMBLY When the host cell becomes activated, the virus uses the body’s own enzymes to create more of its genetic material Also creates a more specialized genetic material which allows it to make longer proteins The enzyme protease cuts the longer HIV proteins into individual proteins When these come together with the virus’ genetic material, a new virus has been assembled STEP 6: BUDDING Final stage of the virus’ lifecycle Virus pushes itself out of the host cell, taking part of the cell membrane with it Outer part covers the virus Contains all of the structures necessary to bind to a new CD4 cell Process begins again HIGHLY ACTIVE ANTIRETROVIRAL THERAPY (HAART or ART) Introduction of 3-drug combination ART in 1996 revolutionized treatment Significantly decreased AIDS-related morbidity and mortality 5 classes of HIV drugs Each class attacks the virus at a different point in the lifecycle A person taking ART will generally take 3 dif ferent drugs from 2 dif ferent classes Best job of controlling the amount of virus in the body and protecting the immune system Protects against resistance Nutritional implications NUCLEOSIDE/NUCLEOTIDE REVERSE TRANSCRIPTASE INHIBITORS (NRTIs) Blocks a very important step in HIV’s reproduction process Act as faulty building blocks in production of viral DNA Blocks HIV’s ability to use reverse transcriptase to correctly build new DNA Without reverse transcriptase the virus is unable to make copies of itself NON-NUCLEOSIDE REVERSE TRANSCRIPTASE INHIBITORS (NNRTIs) Work in a very similar way to NRTIs Also block reverse transcriptase and prevent HIV from making copies of its own DNA NRTIs work on the genetic material NNRTIs act directly on the enzyme itself to prevent it from functioning correctly PROTEASE INHIBITORS When HIV replicates it creates long strands of its own genetic material These long strands must be cut into shorter stands in order for HIV to create more copies of itself Protease acts to cut up these long strands Protease inhibitors block this enzyme Prevent the long strands of genetic material from being cut up into functional pieces ENTRY/FUSION INHIBITORS Block the virus from entering the cells in the first place HIV needs a way to attach and bond to CD4 cells Special structures on cells called receptor sites Found on both HIV and CD4 cells Fusion inhibitors can target those sites on either HIV or CD4 cells and prevent HIV from attaching onto healthy cells INTEGRASE INHIBITORS HIV uses the cells’ genetic material to make its own DNA Reverse transcription The virus then has to integrate its genetic material into the genetic material of the cells Uses the enzyme integrase Integrase inhibitors block this enzyme and prevent the virus from adding its DNA into the DNA of the CD4 cells Preventing this process prevents the virus from replicating and making new copies MEDICAL NUTRITION THERAPY Overall goals of MNT for HIV and AIDS patients are to: Optimize nutritional status, immunity, and well-being Maintain a healthy weight and lean body mass Prevent nutrient deficiencies Reduce the risk of comorbidities Maximize the effectiveness of medical and pharmacological treatments MEDICAL NUTRITION THERAPY Good nutrition is important to all people, whether or not they are living with HIV Eating well is key to maintaining: Strength Energy Healthy immune system Some conditions related to HIV/AIDS and treatment mean that proper nutrition is EXTREMELY IMPORTANT Wasting Diarrhea Lipid abnormalities Immune suppression Food safety and proper hygiene ESTIMATED NUTRITIONAL NEEDS Adequate intake of macro - and micronutrients is essential to restoration and maintenance of body cell mass and normal body function, including immunity The benefits of providing adequate amounts of energy, protein, and micronutrients for people living with HIV are clear However, the EXACT amount of each type of nutrient needed is less clear Long-term clinical trials are needed to provide evidence -based formal recommendations for all nutrients There is no single “diet” that is appropriate for all individuals living with HIV ENERGY Studies show that low energy intake combined with increased energy demands due to HIV are the major driving forces behind HIV-related weight loss and wasting Asymptomatic HIV-infected adults: Goal = maintain body weight 10% increase in energy needs 25 – 30 kcal/kg 28 – 33 kcal/kg Symptomatic HIV-infected adults (with opportunistic infections): 20 – 30% increase in energy needs 30 – 40 kcal/kg Intake should be increased to the extent possible during recovery phase PROTEIN DRI for healthy adults = 0.8 grams/kg Likely adequate for asymptomatic HIV-infected adults Patients with wasted lean body mass Increased protein intake may be beneficial 1.2 – 2.0 grams/kg Currently no evidence to support protein intake in excess of this range Sources of dietary protein include both animal and plant based sources Strict vegetarians need to consume a wide variety of foods to ensure that they obtain adequate amounts of all essential amino acids May benefit from protein, energy, iron, and vitamin B12 supplementation FAT No evidence that total fat needs are increased beyond normal requirements Special advice regarding fat intake may be required for patients undergoing antiretroviral therapy or experiencing persistent diarrhea Malabsorption syndromes may require changes in timing, quantity, and type of fat intake Researchers are currently studying the potential of omega -3 fats in immune function Recommendations are currently no different than for the general population MICRONUTRIENTS Foods rich in micronutrients are likely to help fight infections and improve overall health Studies suggest that deficiencies and/or high intakes of certain micronutrients may af fect the course of HIV Selenium deficiency may increase HIV-related mortality Excessive intake of zinc may be linked to poorer survival Increased intake of vitamins B1 (thiamin) and B2 (riboflavin) may enhance survival Other micronutrient deficiencies may exacerbate oxidative stress associated with HIV infection The patient is likely to benefit from consuming a varied diet that is rich in micronutrients MICRONUTRIENT SUPPLEMENTATION WHO’s position on micronutrient supplementation in HIV infected individuals: Healthy diet is best Dietary intake of micronutrients at RDA levels may not be sufficient to correct nutritional deficiencies Legitimate use of dietary supplementation is to restore nutritional status to normal No conclusive evidence to support use of dietary supplements to improve outcomes Risk of adverse reactions with other medications NUTRITION ASSESSMENT Food and nutrient intake Lifestyle Medical history Important medical factors to consider with HIV/AIDS patients: Stage of disease (CD4 count, viral load) Comorbidities (CV disease, DM, hepatitis) Opportunistic infections Metabolic complications (DLD, insulin resistance) Biochemical measurements (CD4 count, viral load, albumin, hemoglobin, iron status, lipid profile, LFTs, renal function, glucose, vitamin levels) PHYSICAL APPEARANCE Very important Noted and documented during initial assessment and all follow -up assessments Patients must be made aware of possible body shape changes Medical team (including RD) should ask patients about body shape changes every 3 – 6 months Anthropometric measurements Measure changes in body shape and fat redistribution Physical changes = HIV -associated lipodystrophy syndrome Unintentional weight loss often indicates progression of disease SOCIAL AND ECONOMIC FACTORS Mental status and psychosocial issues may take precedence over nutrition counseling Depression is common Habits, food aversions, and timing of meals with medications must be taken into consideration Access to safe, af fordable, and nutritious food? Common barriers: Cost, location of supermarkets, lack of transportation, lack of knowledge of healthier choices Antiretroviral medications are expensive and often compete with food for available monetary resources INTERDISCIPLINARY CARE All HIV patients should have access to a Registered Dietitian Baseline nutrition assessment after HIV diagnosis Reassessment 1 – 2x per year for asymptomatic patients 2 – 6x per year for symptomatic but stable patients Patients that have been diagnosed with AIDS usually need to be seen more frequently and may require nutrition support RD must implement MNT and coordinate care with the interdisciplinary medical team and community resources Many cities/towns/communities have resources available for HIV and AIDS patients Food assistance programs Support systems Recreational facilities CUSTOMIZING A NUTRITION PLAN No specific medical nutrition therapy for HIV and AIDS beyond adequately meeting additional energy, protein, fluid, and micronutrients needs MNT should be individualized for each patient Focus on: High quality foods Variety of fruits and vegetables Problems identified during nutrition assessment (CV risk, liver disease, DM) NUTRITION EDUCATION Education and counseling should focus on: Appropriate and adequate food intake Food behaviors Symptoms that may affect appropriate food intake Benefits and risk of supplemental nutrients Strategies for symptom management Reduce effects of disease Reduce medication intolerance SUPPLEMENTS AND NUTRITION SUPPORT When a patient does not/cannot eat well, supplements may be necessary for getting suf ficient calories, protein, vitamins, and minerals Not perfect substitutes for food Can be helpful Nutritional supplements can be toxic Safe limits are usually 100 – 200% of the nutrient’s DRI Vitamins A and D are most safely obtained through eating food Zinc and selenium are important for immunity, but are toxic at fairly low doses Patients with significant weight loss may be candidates for enteral nutrition (not very common) Unless GI function is severely abnormal, there is no reason to consider parenteral nutrition GI SYMPTOMS AND SIDE EFFECTS Diarrhea is common Causes dehydration, malabsorption, food/nutrient losses Caused by: Infection GI damage Increased motility Lactose/other food intolerances Medication (ART) Short-term: Antidiarrheal medications Long term: Large fluid losses/dehydration Investigation by MD GI SYMPTOMS AND SIDE EFFECTS ART medications: Diarrhea, GERD, nausea, vomiting, constipation PI and NRTI classes are most commonly associated with GI distress Diarrhea can make it difficult for ART medications to be as effective as possible Reduce caffeine and alcohol Test for lactose intolerance Fat malabsorption Feeling full too fast, bloating, foul-smelling stools that float Low-fat diet Pancreatic enzyme supplementation GI SYMPTOMS AND SIDE EFFECTS Nausea Also a common problem Food, medications, odors Psychological aversions to food may develop Look at food-medication interactions Add antinausea/antiemetic medications if necessary If associated with food intake, implement nutritional strategies FOOD SAFET Y Food safety is especially important for patients with low CD4 counts (<200) More likely to get sick from foods that are not safe to eat Food safety rules: Avoid eating raw eggs, meat, and seafood Wash fruits and vegetables thoroughly Use a separate cutting board for raw meats Wash hands, utensils, and cutting boards with soap and water after each use Water safety is extremely important Water can carry parasites, bacteria, and viruses CHOICE OF CASE STUDY PATIENT Dietetic internship primary site = St. Barnabas Hospital in the Bronx Urban level I trauma center Many patients are HIV -positive in addition to condition that they are hospitalized for Ideal opportunity to learn more about HIV and AIDS Nutritional implications PATIENT 45 year-old black woman Brought to the emergency department by EMS with shortness of breath, elevated heart rate, fevers, sweating, frequent vomiting/diarrhea, severe cough with whitish phlegm for two weeks Past Medical History HIV (non-compliant with ART medications, last known CD4 count = 172 in January 2012) Hypertension Depression PCP pneumonia (required hospitalization) Anemia History of IV drug abuse and tobacco use PATIENT Height: 5’2” (62” / 156.4cm) Admission weight: 90# / 40.8kg BMI 16.4 Questionable accuracy of admission weight No mention of what type of scale was used (standing scale, bed scale, etc.) Was the weight stated by the patient? Visibly cachectic Report of 40# (31%) weight loss from usual body weight 130# over the last month Severe weight loss PATIENT Currently unemployed Lives alone in an elevator building in the Bronx Completed high school, did not go to college Baptist Patient’s best friend/on-and-off boyfriend spent almost every day with her during hospitalization Sister in Staten Island MEDICAL HOSPITAL COURSE October 21 , 2013 – November 19, 2013 30 days High nutritional risk Followed-up every 2 – 3 days Initial assessment 4 reassessments Several progress notes Emergency department Medical/surgical floor ICU Step-down ICU General medicine floor Home Admitting Diagnosis: AIDS Multilobar/PCP pneumonia Candida infection of the mouth and esophagus AIDS Acquired Immunodeficiency Syndrome Final stage of HIV infection Badly damaged immune system One or more specific opportunistic infections Certain cancers CD4 count <200 Medical intervention necessary to prevent death PCP PNEUMONIA AIDS-defining condition (opportunistic infection) Serious illness caused by the fungus Pneumocystis jirovecii One of the most frequent and severe opportunistic infections in people with HIV/AIDS Symptoms: Fever Dry cough Shortness of breath Fatigue In HIV-infected patients: Develops sub-acutely Low-grade fever No vaccine to prevent PCP 3 week treatment with antibiotics ORAL/ESOPHAGEAL CANDIDIASIS AIDS-defining condition (opportunistic infection) Also known as thrush Fungal infection - Candida overgrowth A small amount of this fungus normally lives in the mouth Usually kept in check by the immune system and other bacteria Fungus can overgrow when the immune system is weak Common in HIV/AIDS Nutritional implications HOSPITAL DAYS 1 – 8 MEDICAL/SURGICAL FLOOR PCP pneumonia Antibiotics O2 supplementation Follow-up O2 saturation Respiratory and sputum cultures Severe oral thrush Fluconazole and Nystatin Swish and Swallow Mostly resolved within the first week AIDS (non-compliant with ART) CD4 <20 Rule out TB Airborne precautions 3 sputum cultures Diarrhea Flagyl Stool workup HOSPITAL DAYS 1 – 8 MEDICAL/SURGICAL FLOOR O2 saturation Red blood cells must carry sufficient oxygen through the arteries to all internal organs to keep a person alive Percentage of hemoglobin binding sites in the bloodstream occupied by oxygen 95% 91% 87% 88% 75% Possible sepsis WBC 8.2 16.7 Patient states she feels like she is going to die Transferred to ICU HOSPITAL DAYS 9 – 15 ICU Patient appears emaciated and weak, dry crusted lips, minimal oral thrush May require intubation if condition worsens Discussion about end of life issues Appoints best friend as medical proxy Wishes to be intubated and resuscitated if necessary Patient begins to feel better O2 saturation improves WBCs trend down Diarrhea resolved Medically stable Ready for transfer to general medicine floor HOSPITALS DAYS 16 & 17 STEP-DOWN ICU Patient had episode of Ventricular tachycardia Rapid heartbeat that starts in the ventricles 5 beats Most likely caused by medication interaction Transferred to step-down ICU instead of general medicine floor for observation 93 – 100% O2 saturation HOSPITAL DAYS 18 – 30 GENERAL MEDICINE FLOOR C. diff negative Diarrhea resolved Flagyl discontinued Able to walk to bathroom without significant SOB Chest X-ray shows improvements Reglan added for GI upset Polypharmacy Patient tells MD she is interested in restarting ART St. Barnabas Designated AIDS Center appointment scheduled Patient will need home O2 when discharged Social work coordinated with VNS for delivery PATIENT DISCHARGED DISCUSSION OF MEDICAL NUTRITION THERAPY Very sick Extremely advanced AIDS CD4 <20 Two opportunistic infections Both with nutritional implications Difficult PO intake First 10 days in hospital 21.6# weight loss Lowest BMI = 12.5 Cachexia and severe protein-calorie malnutrition WEIGHT DURING HOSPITALIZATION Weight (in lbs.) 95 90 85 80 75 70 65 60 55 50 HD 1 HD 10 HD 11 HD 12 HD 16 HD 23 HD 29 NUTRITION INITIAL ASSESSMENT (HD 2) Chewing problem: Poor dentition Swallowing problem: Painful/difficult swallowing caused by severe oral/esophageal thrush Vomiting: Persistent PTA, currently resolved Diarrhea: Persistent PTA, multiple episodes today Appetite/Intake: Fair, making an effort to eat ~25% breakfast completion Diet PTA: <1 meal/day x2 weeks Inability to cook because of lack of energy Appearance: Cachectic NUTRITION INITIAL ASSESSMENT (HD 2) Anthropometrics BMI: 16.4 Ideal body weight: 110# / 50kg %IBW: 82% Usual body weight: 130# / 59kg %UBW: 69% Estimated nutritional needs Based on current body weight 41kg Calories: 1435 – 1640 kcals (based on 35 – 40kcal/kg) Protein: 61 – 82 grams (based on 1.5 – 2.0gm/kg) Fluid: 1230 – 1435 ml (based on 30 – 35ml/kg) High nutritional risk NUTRITION INITIAL ASSESSMENT (HD 2) Diagnosis: Malnutrition related to poor PO intake, persistent vomiting and diarrhea, painful and difficult swallowing, and oral/esophageal thrush as evidenced by 40# (31%) unintentional weight loss x 1 month, BMI 16.4 Intervention: Discussed the importance of adequate PO intake and strategies to achieve adequacy Recommended patient eat protein portion of meal first PO supplement use between meals, rather than meal replacement Discussed food preferences NUTRITION INITIAL ASSESSMENT (HD 2) Recommendation plan: SLP consult for diet consistency and upgrade from pureed consistency to soft consistency for palatability and PO intake optimization Ensure Plus 8oz PO supplement TID (1050kcal + 39gm protein) for consumption between meals Continue MVI supplementation, maintain hydration status, replete electrolytes as necessary Reassess PO intake Weekly weights HOSPITAL WEEK 1 Poor – fair PO intake 10 – 50% meal completion Consistency upgrade to soft foods Added yogurt and applesauce to breakfast, lunch, and dinner trays Food from outside Grapes, candy Less painful swallowing Patient seen drinking Ensure Plus supplements NUTRITION REASSESSMENT 1 (HD 9) Day after ICU transfer 0% breakfast completion, patient was told not to remove her O2 mask Patient believes Ensure Plus supplement causes diarrhea Weight: 74.5# / 33.8kg (bed scale) 15.5# (17%) weight loss BMI: 13.6 Estimated nutritional needs (based on IBW 50kg) Calories: 1500 – 1750 kcals (based on 30 – 35kcal/kg) Protein: 75 – 100 grams (based on 1.5 – 2.0gm/kg) Fluid: 1250 – 1500 ml (based on 25 – 30ml/kg) NUTRITION REASSESSMENT 1 (HD 9) Interventions and recommendations: Added tuna sandwich and gelatin to patient’s lunch and dinner trays to give more options Continue soft diet Discontinue Ensure Plus supplements Add TwoCal HN 8oz PO supplement BID (950kcal + 40gm protein) Reassess PO intake Daily weights During ICU stay: Added chocolate cake to patient’s dinner trays Added Ensure pudding once daily (170kcal + 4gm protein) NUTRITION REASSESSMENT 2 (HD 17) Fair appetite 75% breakfast completion Observed patient drinking a TwoCal supplement Patient noted with 2.8kg (6.2#) weight gain from lowest weight BMI: 13.6 Patient encouraged by weight gain and motivated to continue gaining weight NUTRITION REASSESSMENT 3 (HD 23) Good appetite 75% meal completion Finishes at least 1 TwoCal supplement per day Eats 2 sandwiches as snacks between meals Loves the chocolate cake Weight: 91 .8# / 41 .6kg (bed scale) BMI: 16.8 17.3# (23%) weight gain since lowest weight during hospitalization 2% weight gain since admission Connection between PO intake and medical condition VERY motivated to continue gaining weight and to leave the hospital Soft regular consistency foods Linezolid Rx added – Tyramine restriction added to diet order NUTRITION REASSESSMENT 4 (HD 29) Continued good appetite Occasional dif ficulty swallowing due to sore throat Patient requests mechanical soft consistency foods Weight: 88.1# / 40kg (standing scale) BMI: 16.1 3.6# (4%) weight loss x 6 days Possibly due to bed scale vs. standing scale Patient feels much better and is able to walk around room Pending discharge, reinforced nutrition education COMMENTS ON MNT PROVIDED Initial diet Discussion about end of life issues Patient realized she was not ready to die Motivated to do anything possible to get better Gaining weight became top priority SUCCESS! Nutrition at home Supplements covered by insurance? Trusting relationship Doctors and nurses frequently changed, but my presence and concern remained constant Significant weight gain = big part of recovery Importance of nutrition team as part of multidisciplinary care A BIG THANK YOU TO THE CLINICAL NUTRITION DEPARTMENT AT ST. BARNABAS HOSPITAL… for being amazing preceptors, teachers, and mentors! Amy (CNM), Allison, Rachel, Bing, Jess, Rebecca, and especially Michelle for helping me find the perfect case study patient QUESTIONS/DISCUSSIO N