rsv update 2011-2012 chuck hui md frcpc pediatric infectious diseases medical director, rsv...

RSV update2011-2012Chuck Hui MD FRCPCPediatric Infectious DiseasesMedical Director, RSV Prophylaxis clinic CHEOMOHLTC Ontario RSV Prophylaxis program advisory group member

Conflict of Interest Declaration

• Local investigator on two investigator driven,

Abbott funded trial• Member of the Canadian Pediatric Society Infectious

Diseases Immunization Committee, the Committee to Advise on Tropical Medicine and Travel, and the Ministry of Health and Long Term Care of Ontario RSV Advisory Group

Objectives

• Address the AAP and CPS guidelines• Identify the underlying assumptions and reasoning for the

guidelines• Contrast the guidelines with the MOHLTC 2011-2012 guideline• To review the process for enrolling patients into the provincial

RSV Prophylaxis for High-Risk Infants Program for the 2011-12 season

• To highlight changes to the enrolment form, enrolment process, drug ordering process and dosing schedule

What is RSV?

• RNA paramyxovirus – 2 strains – A and B

• Often circulate concurrently

• Humans are only source• Almost all children infected at least once by 2 yrs of age• Re-infection is common• Presents as a common URI in older children and adults

Epidemiology

• Annual season in Canada– November to April

• Viral shedding 3-8 days– May be longer in young and immunosuppressed

• Incubation period 2-8 days• Supportive care, no good treatment

Burden of RSV in Young Children

• Population based study in children < 5yrs

• ER (2000-2004); Pediatric offices (2002-2004)

• 5067 enrolled; 919(18%) RSV infections; RSVH overall (11%)

• RSV associated with: 18% ER visits

15% office visits

• Average RSVH: 17/1000 <6 months of age

3/1000 < 5 years of age

Hall CB et al. NEJM 2009;360:588-598

Burden of RSV in Young Children

• Majority of children had no underlying medical illness

• Only risk factors identified: < 2 years of age, history of prematurity

• Under 5 yrs of age RSV results in: 1 of 38 visits to the ER 1 of 13 visits to a primary care (FD) office

Hall CB et al. NEJM 2009;360:588-598

Global Burden

• Global burden of disease related to RSV in children younger than 5 years

• Systematic review 1995-2009 – 33.8 million new episodes of RSV-associated ALRI occurred worldwide in children younger than 5 years

– 3.4 million episodes representing severe RSV-associated ALRI necessitating hospital admission

– 66 000–199 000 children younger than 5 years died from RSV associated ALRI in 2005

• 99% of these deaths occurring in developing countriesLancet. 2010 May 1; 375(9725)

Treatment

• Does not work…– Bronchodilators– Steroids – Hypertonic saline– Physiotherapy– Montelukast– Antibiotics

Cochrane Database Systematic Review. 2006Cochrane Database of Systematic Reviews. 2004Cochrane Database Systematic Reviews 2007 NEJM 357;4, July 26, 2007NEJM 360;20 May 14, 2009British Medical Journal 1966;1:83–5

Prevention - Palivizumab Efficacy

55

3947

80

0

20

40

60

80

100

Overall BPD <32 wks 32-35 wks

% r

educti

on in h

osp

italizati

on

IMPACT Pediatrics 1998

When we don’t have anything else, we have a bunch of grumpy old ‘experts’ sitting around a table…

American Academy of Pediatrics (AAP)

Background• Statements 1998, 2003, 2009• Significant geographic variability in the US• Third party payers

• AAP recommendations are meant only for American Pediatricians

American Academy of Pediatrics (AAP) 2009

Congenital Heart Disease (CHD) and Chronic Lung Disease (CLD)• Unchanged

Dosing• maximal number of 5 doses for all geographic locations for

infants with hemodynamically significant CHD, CLD, or birth before 32 weeks' 0 days' gestation

• maximal number of 3 doses for infants with a gestational age of 32 weeks 0 days to 34 weeks 6 days without hemodynamically significant CHD or CLD

American Academy of Pediatrics (AAP) 2009

32 0 to 34 6

• Risk factors:– infant attends child care; or– 1 or more siblings or other children younger than 5 years live permanently in the child's

household

• Infants with a gestational age of 32 weeks 0 days through 34 weeks 6 days born within 3 months before the start of RSV season or at any time throughout the RSV season will qualify for prophylaxis under the new recommendations if they have at least 1 of these 2 risk factors. Previous recommendations required 2 of 5 risk factors

• Infants born from 32 weeks' 0 days' through 34 weeks' 6 days' gestation who qualify for prophylaxis under the new recommendations should receive prophylaxis only until they reach 90 days of age or a maximum of 3 doses (whichever comes first). This is a change from the previous recommendation for 5 months of prophylaxis

Risk factors for RSV hospitalization worldwide

Exposure• Age at start of RSV season• Siblings• Crowding at home• Day care attendance• Day care attendance of siblings• Discharge between October and

December

Social Factors• Breast feeding

Physiologic Factors• Low birth weight• Male sex• Family history of wheezing• CLD• Neurologic problems• Birth order >2nd

Eur J Clin Microbiol Infect Dis (2008) 27:891–899

Variables in the final Logistic Regression Model (Risk Scoring Tool- PICNIC Study)

Variable ScoreSGA (GA <10%) [ Yes/No ] 12

Gender (Male/Female) 11

Birth Month (Nov,Dec,Jan) 25

Subject or Siblings in Day Care [ Yes/No ] 17

Family History without eczema [ Yes/No ] 12

>5 individuals in the home counting

the subject [ Yes/No ] 13

Two or more smokers in the house [Yes/No ] 10

Total 100

Only 3 doses?

McCormick J, Pediatr Pulmonol. 2002;34:262-266.

Canadian Paediatric Society (CPS)

Background• Previous position statements 1999, 2003, 2009• Updated 2011

• GRADE evidence based assessment• Cost-effectiveness assessment

Canadian Paediatric Society (CPS) 2011

Congenital Heart Disease (CHD) and Chronic Lung Disease (CLD)• Criteria – unchanged• Recommendation

– receive up to five doses of palivizumab (strong recommendation/high-quality evidence)

• Remarks - Decisions regarding the use of palivizumab in this and all other high-risk groups need to take competing local priorities for funding into account, which may allow for use of palivizumab in only selected infants in this cohort

• Values and preferences - This recommendation places a high value on preventing hospitalizations in these vulnerable infants despite the high cost of palivizumab

Canadian Paediatric Society (CPS) 2011

Infants in remote communities who would require air transportation for hospitalization:

• Recommendation #1– Consideration should be given to administering up to five doses of palivizumab

for all infants born before 36 weeks’ GA and younger than six months of age at the beginning of the RSV season

(strong recommendation/high-quality evidence).

• Remarks. It is not clear whether this recommendation should apply only to Inuit infants, to all Aboriginal infants or to all infants in remote communities. The incidence of RSV hospitalization in a remote community in previous years should be taken into account when making this decision. A practical issue is that the onset and duration of RSV season is unpredictable in the Far North. Occasionally, more than a year goes by between RSV seasons (Michael Young, personal communication). To save money, one would delay administering palivizumab until there is confirmed RSV activity in a remote community. The attendant risk is that significant spread may have already occurred.

• Values and preferences. This recommendation places high value on preventing RSV hospitalizations because of the high cost of such admissions.

Canadian Paediatric Society (CPS) 2011

• Recommendation #2– Consideration may be given to administering up to

five doses of palivizumab to term Inuit infants younger than six months of age in communities with documented persistent high rates of RSV hospitalizations

(weak recommendation/no evidence)

• Remarks. There is no direct evidence of the efficacy of palivizumab in term Inuit infants, but observational studies in preterm Inuit infants and in term infants with other risk factors suggest that there would be efficacy. There are insufficient data regarding the morbidity from RSV to recommend use in term infants in other Northern populations

Canadian Paediatric Society (CPS) 2011

32 weeks 0 days to 35 weeks 6 days’ GA: • Recommendation #1

– A panel of experts should be convened in each province or territory (weak recommendation/no evidence) to establish a policy for these infants

• Remarks - The upper limit of GA may need to be determined by available funding

• Recommendation #2– The panel may want to use the American Academy of Paediatrics

(AAP) criteria, or the Canadian risk-scoring tool, to select infants eligible for palivizumab prophylaxis (weak recommendation/no evidence)

• Remarks. It seems likely that applying the AAP criteria would result in more infants being prophylaxed, but for a shorter time. It is impossible to predict the relative impact on hospitalizations

Canadian Paediatric Society (CPS) 2011

• Recommendation #3– Irrespective of the criteria chosen, giving the last dose at three months’ chronological age should be considered in this GA cohort (weak recommendation/no evidence)

• Remarks. This recommendation is an attempt to balance cost and benefit, and is designed to protect infants at greatest risk of hospitalization

Canadian Paediatric Society (CPS) 2011

Immunodeficiencies, Down syndrome, cystic fibrosis, upper airway obstruction or a chronic pulmonary disease other than CLD:

• Recommendation– Palivizumab is not routinely recommended. However, it may be considered

for children younger than 24 months of age (because they may not yet have encountered their first RSV infection) who are likely to be exposed to RSV and are on home oxygen, have had a prolonged hospitalization for severe pulmonary disease, or are severely immunocompromised (weak recommendation/no evidence)

• Remarks. This recommendation should be expanded to include more children with pulmonary disease if evidence becomes available that avoidance or delay of the initial RSV hospitalization impacts long-term pulmonary function

How should palivizumab be administered? • Recommendation

– Each jurisdiction should optimize processes to implement these recommendations in the most cost-effective manner. Well-organized palivizumab clinics decrease drug wastage (strong recommendation/no evidence)

OK, tell me what I need to know!!!!!!

MOHLTC Ontario 2011-2012

Background• Administered through the Exceptional Access

Program (EAP) MOH• RSV Advisory Group• RSV Adjudicators

MOHLTC Ontario 2011-2012

Background• Administered through the Exceptional Access

Program (EAP) MOH• RSV Advisory Group• RSV Adjudicators

• NO CHANGE!

MOHLTC Ontario 2011-2012

Prematurity• ≤ 32 completed weeks gestation and aged ≤ 6 months at the

start of, or during, the local RSV season; or• 33 – 35 completed weeks gestation and aged ≤ 6 months at the

start of, or during the local RSV season, who DO NOT live in isolated communities AND have a Risk Assessment Tool Score of 49 to 100; or

• 33 – 35 completed weeks gestation and aged ≤ 6 months at the start of, or during the local RSV season, and who LIVE IN isolated communities where paediatric hospital care is not readily accessible and ambulance transportation for hospital admission is required;

MOHLTC Ontario 2011-2012

CHD/BPD/Down Syndrome• < 24 months of age with Down Syndrome / Trisomy 21; or• < 24 months of age with BPD/CLD and who required oxygen

and/or medical therapy within the 6 months preceding the RSV season; or

• < 24 months of age with hemodynamically significant (HS) cyanotic or acyanotic congenital heart disease (CHD); requiring corrective surgery or is on cardiac medication for hemodynamic significant disease

MOHLTC Ontario 2011-2012

Special Requests• Assessed on an individual basis• Requires letter from requesting physician and an ID +

Respirologist signature

• Potential diagnoses:– Upper airway anomalies, severe immunodeficiencies, neuromuscular diseases, etc.

• START: Ontario RSV Medical Advisory Group has recommended November 14th, 2011 as season start

• END: April 1st, 2012 or when season is declared ended locally, whichever comes first

• Season is considered on-going when there are 2 or more local RSV hospitalizations / week for two consecutive weeks

SEASON START / END

Out of season process

• From May 1st – November 1st , 2011

• NICUs identify patients that qualify for prophylaxis in a log book and send the referrals to CHEO RSV Coordinator monthly

• Enrolment forms / appointment arrangements completed by CHEO RSV Coordinator

During season (November – March)

• NICUs enroll their own patients with Abbott• First dose of Synagis is administered prior to

discharge from NICU• Follow up appointments may be made by NICUs by

directly contacting CHEO’s Ambulatory Care Call Center (613-737-2222)

• NICUs fax / email Abbott reference no. and patient info to CHEO RSV Coordinator

Summary of Changes: 2011-12

1. Enrolment process

2. Enrolment forms

3. Drug ordering process

4. Dosing schedule

ENROLMENT PROCESS

• All enrolments will now be processed and reference numbers provided by Abbott

• The ministry’s coordinator will review all those with BPD/CHD criteria and the special requests

• Enrolment forms are faxed directly to the Synagis Coordinator at Abbott Canada (1-800-513-7337)

ENROLMENT

• Turn around time is usually one business day (prematurity criteria)

• For enrolments under the BPD / CLD and CHD criteria and Special Requests, turn around time is three business days

ENROLMENT FORMS

• Since the form is now going to Abbott Canada and not MOHLTC, NO personal health identifiers (name, address, OHIP no.) are to be provided

• Fields for the child’s full name and OHIP no. have been removed from the enrolment forms

• Really simplified – one form for all• Risk Assessment Tool is now part of the enrolment

form on page 2

DRUG ORDERING PROCESS

• Shipment orders directed to Synagis Coordinator at Abbott (fax: 1-800-513-7337)

• For NICUs who will give the first dose in November, it can be ordered using enrolment form (Section 7)

• All subsequent doses should be ordered on Synagis order form

• Shipments occur within 24 hours, except for orders placed on Fridays, weekends and stat holidays

• The ministry requests that all providers be mindful of costs such that drug wastage is minimized

• When an entire vial is not required for a patient, residual product may be used for a second patient if administered within 6 hours from the time of reconstitution under controlled and aseptic conditions

$752.26

$1,504.51

DOSING SCHEDULE(as per Ontario’s RSV Medical Advisory Group

Dose Week # Month

1 0 Mid-November

2 3 December

3 7 January

4 11 February

5 15 March

ENROLMENT FORMS (on line)

http://www.health.gov.on.ca/english/providers/program/drugs/funded_drug/fund_respiratory.aspx

CHEO RSV Clinic• Fridays (primarily) in clinic C1 on the main floor of CHEO• First clinic: November 18, 2011

• Team for the 2011-12 season:Josée Chiasson, RPNChantal Horth, RCCarolyn Lawrence, RNJoanne Matton, PSC / Alyssa Long, PSCBarbara Murchison, RCAllyson Shephard, RNChuck Hui, MD (Medical Director)Lisa Nesbitt (Clinical Manager)

CONTACT US

• By email: rsvclinic@cheo.on.ca• By telephone: 613-737-7600 Ext 2406 (Coordinator)• By fax: 613-738-4329