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Fentanilo intranasal para el tratamiento del dolor agudo en niños

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Referencias

Referencias de los estudios incluidos en esta revisión

Borland 2007 {published data only}

Borland M, Jacobs I, King B, O'Brien D. A randomized controlled trial comparing intranasal fentanyl to intravenous morphine for managing acute pain in children in the emergency department. Annals of Emergency Medicine 2007;49(3):335‐40.

Borland 2011 {published data only}

Borland M, Milsom S, Esson A. Equivalency of two concentrations of fentanyl administered by the intranasal route for acute analgesia in children in a paediatric emergency department: a randomized controlled trial. Emergency Medicine Australasia 2011;23(2):202‐8. [DOI: 10.1111/j.1742‐6723.2011.01391.x]

Younge 1999 {published data only}

Young PA, Nicol MF, Kendall JM, Harrington AP. A prospective randomized pilot comparison of intranasal fentanyl and intramuscular morphine for analgesia in children presenting to the emergency department with clinical fractures. Emergency Medicine 1999;11(2):90‐4.

Referencias de los estudios excluidos de esta revisión

Borland 2005 {published data only}

Borland ML, Bergesio R, Pascoe EM, Turner S, Woodger S. Intranasal fentanyl is an equivalent analgesic to oral morphine in paediatric burns patients for dressing changes: a randomised double blind crossover study. Burns 2005;31(7):831‐7. [PUBMED: 16005154]

Chung 2010 {published data only}

Chung S, Lim R, Goldman RD. Intranasal fentanyl versus placebo for pain in children during catheterization for voiding cystourethrography. Pediatric Radiology 2010;40(7):1236‐40. [DOI: 10.1007/s00247‐009‐1521‐1]

Sandler 1992 {published data only}

Sandler ES, Weyman C, Conner K, Reilly K, Dickson N, Luzins J, et al. Midazolam versus fentanyl as premedication for painful procedures in children with cancer. Pediatrics 1992;89(4):631‐4. [PUBMED: 1557241]

Barrett 2012 {published data only}

Intranasal fentanyl versus intravenous morphine in the emergency department treatment of severe painful sickle cell crises in children: study protocol for a randomized controlled trial. Ongoing studyMarch 2012.

Alonso‐Serra 2003

Alonso‐Serra H, Wesley K. Position paper ‐ Prehospital pain management. Prehospital Emergency Care 2003;7:482‐8. [MEDLINE: 14582104]

Bendall 2011

Bendall JC, Simpson PM, Middleton PM. Effectiveness of prehospital morphine, fentanyl, and methoxyflurane in pediatric patients. Prehospital Emergency Care 2011;15(2):158‐65.

Berde 2002

Berde CB, Sethna NF. Analgesics for the treatment of pain in children. New England Journal of Medicine 2002;347:1094‐103. [MEDLINE: 12362012]

Borland 2008

Borland ML, Clark LJ, Esson A. Comparative review of the clinical use of intranasal fentanyl versus morphine in a paediatric emergency department. Emergency Medicine Australasia 2008;20(5):515‐20.

Cordell 2002

Cordell WH, Keene KK, Giles BK, Jones JB, Jones JH, Brizendine EJ. The high prevalence of pain in emergency care. American Journal of Emergency Medicine 2002;20:165‐9. [MEDLINE: 11992334]

Deeks 2001

Deeks JJ, Altman DG, Bradburn MJ. Statistical methods for examining heterogeneity and combining results from several studies in meta‐analysis. In: Egger M, Dave‐Smith G, Altman DG editor(s). Systematic Reviews in Health Care: Meta‐analysis in Context. 2nd Edition. London: BMJ Publishing Group, 2001:285‐312.

Egger 1997

Egger M, Smith GD, Philips AN. Meta‐analysis: principles and procedures. BMJ 1997;315(7121):1533‐7. [MEDLINE: 9432252]

Foster 2008

Foster D, Upton R, Christrup L, Popper L. Pharmacokinetics and pharmacodynamics of intranasal versus intravenous fentanyl in patients with pain after oral surgery. Annals of Pharmacotherapy 2008;42(10):1380‐7. [DOI: 10.1345/aph.1L168]

Friedland 1994

Friedland LR, Kilick RM. Emergency department analgesia use in pediatric trauma victims with fractures. Annals of Emergency Medicine 1994;23(2):203‐7.

Galinski 2011

Galinski M, Picco N, Hennequin B, Raphael V, Ayachi A, Beruben A, et al. Out‐of‐hospital emergency medicine in pediatric patients: prevalence and management of pain. American Journal of Emergency Medicine 2011;29(9):1062‐6. [MEDLINE: 20685056]

Glasziou 2001

Glasziou P, Irwing L, Bain C, Colitz G. Systematic Reviews in Healthcare: a Practical Guide. Systematic Reviews in Healthcare: A Practical Guide. 1st Edition. Cambridge: Cambridge University Press, 2001.

Groenewald 2012

Groenewald C, Rabbitts J, Schroeder D, Harrison T. Prevalence of moderate–severe pain in hospitalized children. Pediatric Anesthesia 2012;27(7):661‐8. [DOI: 10.1111/j.1460‐9592.2012.03807.x]

Guyatt 2008

Guyatt GH, Oxman AD, Kunz R, Vist GE, Falck‐Ytter Y, Schunemann HJ. What is "quality of evidence" and why is it important to clinicians. BMJ 2008;336:995‐8. [MEDLINE: 18456631]

Hansen 2013

Hansen MS, Dahl JB. Limited evidence for intranasal fentanyl in the emergency department and the prehospital setting ‐ a systematic review. Danish Medical Journal 2013;60(1):1‐6. [PUBMED: 23340187]

Hennes 2005

Hennes H, Kim M, Pirrallo R. Prehospital pain management: a comparison of providers’ perceptions and practices. Prehospital Emergency Care 2005;9(1):32–9. [MEDLINE: 16036825]

Higgins 2011

Higgins JPT, Green S, editors. Cochrane Handbook for Systematic Reviews of Interventions Version 5.1.0 [updated March 2011]. The Cochrane Collaboration, 2011. www.cochrane‐handbook.org.

Izsak 2008

Izsak E, Moore JL, Stringfellow K, Oswanski MF, Lindstrom DA, Stombaugh HA. Prehospital pain assessment in pediatric trauma. Prehospital Emergency Care 2008;12(2):182‐6.

Kart 1997

Kart T, Christrup LL, Rasmussen M. Recommended use of morphine in neonates, infants, and children based on a literature review, part 2: clinical use. Paediatric Anaesthesia 1997;7:93‐101. [MEDLINE: 9188108]

Lau 1998

Lau J, Loannidis JPA, Schmid CH. Quantitative synthesis in systematic reviews. In: Mulrow C, Cook D editor(s). Systematic Reviews: Synthesis of Best Evidence in Healthcare Decisions. 1st Edition. Vol. 1, Philadelphia: American College of Physicians, 1998:91‐110.

Light 1984

Light RJ, Pillemer DB. Summing Up: The Science of Reviewing Research. 1st Edition. Vol. 1, Cambridge, Massachusetts: Harvard University Press, 1984.

MacLean 2007

MacLean S, Obispo J, Young KD. The gap between pediatric emergency department procedural pain management treatments available and actual practice. Pediatric Emergency Care 2007;23(2):87‐93. [PUBMED: 17351407]

Mudd 2010

Mudd S. Intranasal fentanyl for pain management in children: a systematic review of the literature. Journal of Pediatric Health Care September‐October;25(5):316‐22. [DOI: 10.1016/j.pedhc.2010.04.011]

Panagiotou 2010

Panagiotou I, Mystakidou K. Intranasal fentanyl: from pharmacokinetics and bioavailability to current treatment applications. Expert Review of Anticancer Therapy 2010;10(7):1009‐21. [DOI: 10.1586/era.10.77]

Paris 1988

Paris PM, Stewart RD. Pain Management in Emergency Medicine. 1st Edition. Vol. 1, Norwalk, Connecticut: Appleton‐Lange, 1988:p xiii.

Probst 2005

Probst BD, Lyons E, Leonard D, Esposito TJ. Factors affecting emergency department assessment and management of pain in children. Pediatric Emergency Care 2005;21(5):298‐305. [PUBMED: 15874811 ]

RevMan 5.2 [Computer program]

The Nordic Cochrane Centre, The Cochrane Collaboration. Review Manager (RevMan). Version 5.2. Copenhagen: The Nordic Cochrane Centre, The Cochrane Collaboration, 2011.

Rupp 2004

Rupp T, Delaney KA. Inadequate analgesia in emergency medicine. Annals of Emergency Medicine 2004;43(4):494‐503. [MEDLINE: 15039693]

Saunders 2010

Saunders M, Adelgais K, Nelson D. Use of intranasal fentanyl for the relief of pediatric orthopedic trauma pain. Academic Emergency Medicine 2010;17(11):1155‐61.

Schechter 1989

Schechter N. The under‐treatment of pain in children: an overview. Pediatric Clinics of North America 1989;36:781–94. [MEDLINE: 2666929]

Verghese 2010

Verghese S, Hannallah R. Acute pain management in children. Journal of Pain Research 2010;3:105‐23. [PUBMED: 3004641]

Wilsey 2004

Wilsey B, Fishman S, Rose JS, Papazian J. Pain management in the ED. American Journal of Emergency Medicine 2004;22(1):51‐7. [MEDLINE: 14724879]

Wilson 1989

Wilson JE, Pendleton JM. Oligoanalgesia in the emergency department. American Journal of Emergency Medicine 1989;7(6):620‐3. [MEDLINE: 2803357]

Referencias de otras versiones publicadas de esta revisión

Murphy 2012

Murphy A, O'Sullivan R, Wakai A, Grant T, Barrett MJ, Cronin J, et al. Intranasal fentanyl for the management of acute pain in children. Cochrane Database of Systematic Reviews 2012, Issue 7. [DOI: 10.1002/14651858.CD009942]

Murphy 2014

Murphy A, O'Sullivan R, Wakai A, Grant TS, Barrett MJ, Cronin J, et al. Intranasal fentanyl for the management of acute pain in children. Cochrane Database of Systematic Reviews 2014, Issue 10. [DOI: 10.1002/14651858.CD009942.pub2]

Characteristics of studies

Characteristics of included studies [ordered by year of study]

Younge 1999

Methods

Prospective, randomized, open‐label, 2‐arm study at a single site (paediatric emergency department) in Australia

Participants

47 patients (3‐10 years of age) with clinically suspected fracture of the upper and/or lower limbs

Interventions

Intervention 1: single dose of INF (50 mcg/mL) at a dose of 1 mcg/kg

Intervention 2: single dose of IMM (10 mg/mL) at a dose of 0.2 mg/kg

Outcomes

Primary outcome measure: reduction in pain using Wong Baker Faces (ordinal scale 0‐5). Pain intensity was measured at 0, 5, 10, 20 and 30 minutes

Secondary outcome measures: occurrence of opiate toxicity (sedation, respiratory or cardiovascular depression) and participant tolerance of analgesia (nausea/vomiting and reported discomfort)

Notes

Both interventions produced a reduction in pain score. "Rescue analgesia" was administered to 1 participant in the INF group and to no participants in the IMM group

Risk of bias

Bias

Authors' judgement

Support for judgement

Random sequence generation (selection bias)

Low risk

Quote: "Included in the study were children aged between 3 and 10 years who were otherwise healthy and who presented to the ED with clinical fracture of the upper or lower limbs"

Allocation concealment (selection bias)

Low risk

Quote: "Once parents had given informed consent, patients were randomized via a sealed envelope system"

Blinding of participants and personnel (performance bias)
All outcomes

High risk

Comment/Quote: Participants were randomly assigned "to receive a single dose of either 1.0 μg/kg INF or 0.2 mg/kg IMM"

Blinding of outcome assessment (detection bias)
All outcomes

Low risk

Quote: "Pain was assessed by the children at 0, 5, 10, 20 and 30 min after treatment administration using Wong Baker Faces (ordinal scoring 0–5) and also by their parents using a visual analogue score (continuous 0–10)"

Incomplete outcome data (attrition bias)
All outcomes

Low risk

Quote: "Forty‐seven children were recruited into the study, 24 into the INF arm and 23 into the IMM arm, with no parents refusing consent"

Comment: No participant was withdrawn from this study following enrolment

Selective reporting (reporting bias)

Low risk

Comment: All of the study's prespecified outcomes of interest in the review have been reported in the prespecified way

Other bias

Low risk

Comment: The study appears to be free of other sources of bias

Borland 2007

Methods

Prospective, double‐blind, randomized, placebo‐controlled clinical trial at a single site (tertiary paediatric emergency department) in Australia

Participants

67 patients (7‐15 years of age) with clinically deformed closed long bone fractures were enrolled

Interventions

Intervention 1: active INF (150 mcg/mL) at a dose of 1.4 mcg/kg AND intravenous placebo

Intervention 2: active IVM (10 mg/mL) at a dose of 0.1 mg/kg AND intranasal placebo

Outcomes

Primary outcome measure: reduction in pain using a 100‐mm unmarked visual analogue scale. Pain intensity was measured at 0, 5, 10, 20 and 30 minutes

Secondary outcome measures: occurrence of opiate toxicity (sedation, respiratory or cardiovascular depression) and participant tolerance of analgesia (nausea/vomiting and reported discomfort)

Notes

Both interventions produced a reduction in pain score. "Rescue analgesia" was administered to no participants in the group who received active INF and to 2 participants in the group who received active IVM

Risk of bias

Bias

Authors' judgement

Support for judgement

Random sequence generation (selection bias)

Unclear risk

Quote: "A convenience sample of children aged 7 to 15 years, presenting with clinically deformed closed long‐bone fractures, was identified at triage and invited to join the study"

Allocation concealment (selection bias)

Low risk

Quote: "The study packs were randomly allocated in the pharmacy and supplied to the department in blocks of 10, and the next available pack was taken on enrolment of the patient"

Blinding of participants and personnel (performance bias)
All outcomes

Low risk

Quote: "Study packs contained either the concentrated fentanyl solution or normal saline solution in identical containers plus a 1‐mL ampoule of morphine (10 mg/mL) or normal saline solution also in identical containers"

Blinding of outcome assessment (detection bias)
All outcomes

Low risk

Quote: "The patient provided a pain score with the visual analogue scale at 0, 5, 10, 20, and 30 minutes after the administration of analgesia. They also completed a second assessment to compare their current pain with the previous rating verbally as 'much better,' 'little better,' 'the same,' 'little worse,' or 'much worse.' The child was blinded to previous scores"

Incomplete outcome data (attrition bias)
All outcomes

Low risk

Comment: Of the 67 participants enrolled in the study, 2 were withdrawn (1 participant in each study arm)

Quote: "1 child was withdrawn when IV access failed and intramuscular analgesia was administered; 1 child received 1 dose of intranasal fentanyl and withdrew at 5 minutes"

Selective reporting (reporting bias)

Low risk

Comment: All of the study's prespecified outcomes of interest in the review have been reported in the prespecified way

Other bias

Low risk

Comment: The study appears to be free of other sources of bias

Borland 2011

Methods

Prospective, double‐blind, randomized, controlled trial at a single site (tertiary paediatric emergency department) in Australia

Participants

189 patients (3‐15 years of age) with clinically deformed closed long bone fractures were enrolled

Interventions

Intervention 1: SINF (50 mcg/mL) at a dose of 1.5 mcg/kg

Intervention 2: HINF (300 mcg/mL) at a dose of 1.5 mcg/kg

Outcomes

Primary outcome measure: reduction in pain using a 100‐mm VAS for participants >7 years or Faces Pain Scale for those participants incapable of using the VAS. Pain intensity was measured at 0, 10, 20 and 30 minutes

Secondary outcome measures: occurrence of opiate toxicity (sedation, respiratory or cardiovascular depression) and participant tolerance of analgesia (nausea/vomiting and reported discomfort)

Notes

Both interventions produced a reduction in pain score. "Rescue analgesia" was administered to 42 participants in the SINF group and to 25 participants in the HINF group

Risk of bias

Bias

Authors' judgement

Support for judgement

Random sequence generation (selection bias)

Low risk

Quote: "Children aged 3–15 years inclusive presenting to the ED with clinically deformed closed long bone fractures were included. The patients were identified by the triage nurse as requiring urgent analgesia"

Allocation concealment (selection bias)

Low risk

Quote: "Patients were randomized using a computer‐generated programme in blocks of 10 stratified with age brackets of 3–5 years, 6–10 years and 11–15 years with allocation made by a sealed envelope in the study pack"

Blinding of participants and personnel (performance bias)
All outcomes

Low risk

Quote: "All patients received an initial standard dose of 1.5 mcg/kg (either SINF or HINF) administered with the MAD device (Wolfe Tory Medical, Salt Lake City, UT, USA) with volumes >0.2 mL alternated between nostrils. A nurse, blinded to the solution of fentanyl administered, undertook observations including pain scores at 0, 10, 20 and 30 min post initial INF dose"

Blinding of outcome assessment (detection bias)
All outcomes

Low risk

Quote: "Outcome measures included pain scores using either a 100 mm visual analogue pain scale (VAS) for patients >7 years of age if the patient was deemed capable by the observation nurse, or Faces Pain Scale–Revised (FPS‐R) for those patients incapable of using VAS"

Incomplete outcome data (attrition bias)
All outcomes

Low risk

Comment: 199 participants were enrolled in this study. 10 were withdrawn during the study (HINF, N = 6; SINF, N = 4) for the following reasons: no written consent, no pain score documented, prehospital administration of opiates, INF not required

Selective reporting (reporting bias)

Low risk

Comment: All of the study's prespecified outcomes of interest in the review have been reported in the prespecified way

Other bias

Low risk

Comment: The study appears to be free of other sources of bias

ED: Emergency department.

HINF: High concentration intranasal fentanyl.

IMM: Intramuscular morphine.

INF: Intranasal fentanyl.

IVM: Intravenous morphine.

SINF: Standard concentration intranasal fentanyl.

VAS: Visual analogue scale.

Characteristics of excluded studies [ordered by year of study]

Study

Reason for exclusion

Sandler 1992

Preemptive treatment of children in pain in advance of lumbar puncture or bone marrow aspiration

Borland 2005

Preemptive treatment of children in pain requiring a change in burn dressing

Chung 2010

Preemptive treatment of children in pain during catheterization for voiding cystourethrography

Characteristics of ongoing studies [ordered by study ID]

Barrett 2012

Trial name or title

Intranasal fentanyl versus intravenous morphine in the emergency department treatment of severe painful sickle cell crises in children: study protocol for a randomized controlled trial

Methods

Randomized, double‐blind, double‐dummy, active control trial

Participants

Children (weighing more than 10 kg) between 1 year and 21 years of age with severe painful sickle cell crisis

Interventions

Each participant will receive a single active agent and a single placebo via intravenous and intranasal routes

Outcomes

The primary endpoint is severity of pain scored at 10 minutes from administration of study medications. Secondary endpoints include pain severity measured at 0, 5, 15, 20, 30, 60 and 120 minutes after administration of analgesia, proportion of participants requiring rescue analgesia and incidence of adverse events

Starting date

March 2012

Contact information

Michael Joseph Barrett: [email protected]

Notes

Trial Registration: Current Controlled Trials ISRCTN67469672 and EudraCT no. 2011‐005161‐20

Study flow diagram.
Figuras y tablas -
Figure 1

Study flow diagram.

Risk of bias graph: review authors' judgements about each risk of bias item presented as percentages across all included studies.
Figuras y tablas -
Figure 2

Risk of bias graph: review authors' judgements about each risk of bias item presented as percentages across all included studies.

Risk of bias summary: review authors' judgements about each risk of bias item for each included study.
Figuras y tablas -
Figure 3

Risk of bias summary: review authors' judgements about each risk of bias item for each included study.

Intranasal fentanyl compared with intravenous morphine for the management of acute moderate to severe pain in children

Patient or population: children (aged < 18 years) with acute severe pain

Settings: emergency department

Intervention: intranasal fentanyl

Comparison: intravenous morphine

Outcomes

Illustrative comparative risks* (95% CI)

Relative effect
(95% CI)

Number of participants
(studies)

Quality of the evidence
(GRADE)

Comments

Assumed risk

Corresponding risk

Intravenous morphine

Intranasal fentanyl

Pain reduction (mean VAS)

Pain assessed before analgesia (0 min) and at 5, 10, 20 and 30 min after analgesia

0 min = 67

5 min = 42

10 min = 41

20 min = 35

30 min = 33

0 min = 68

5 min = 55

10 min = 46

20 min = 37

30 min = 37

67 participants

(1 study)

⊕⊕⊕⊕
high

Given no statistically significant difference between treatment arms, VAS scores were combined to form an overall VAS score for each time point. Combined VAS scores produced statistically significant reductions in pain at 5, 10 and 20 min after analgesia

Respiratory depression

No cases were reported in this study

No cases were reported in this study

67 participants

(1 study)

⊕⊕⊕
moderate

Dosage regimen for this study was calculated for 3 weight intervals. Inclusion of 21 children outside the weight intervals (1 less than 20 kg and 20 greater than
50 kg) may have resulted in most of these children receiving smaller per‐kilogram doses of IV morphine and INF, thereby reducing the potential occurrence of adverse events listed

Hypotension

No cases were reported in this study

No cases were reported in this study

67 participants

(1 study)

⊕⊕⊕
moderate

Dosage regimen for this study was calculated for 3 weight intervals. Inclusion of 21 children outside the weight intervals (1 less than 20 kg and 20 greater than
50 kg) may have resulted in most of these children receiving smaller per‐kilogram doses of IV morphine and INF, thereby reducing the potential occurrence of adverse events listed

Decreased level of consciousness

No cases were reported in this study

No cases were reported in this study

67 participants

(1 study)

⊕⊕⊕
moderate

Dosage regimen for this study was calculated for 3 weight intervals. Inclusion of 21 children outside the weight intervals (1 less than 20 kg and 20 greater than
50 kg) may have resulted in most of these children receiving smaller per‐kilogram doses of IV morphine and INF, thereby reducing the potential occurrence of adverse events listed

Intolerance to analgesia

1 participant complained of a momentary flush at the IV site following administration of morphine

4 participants; 3 participants reported a "bad taste" following INF administration, 1 participant vomited 20 min following INF administration

67 participants

(1 study)

⊕⊕⊕⊕
high

Use of ED "rescue" analgesia

1 participant required 5 additional doses of IV morphine (protocol violation)

1 participant required 6 additional doses of INF (protocol violation)

67 participants

(1 study)

⊕⊕⊕
moderate

Protocol violation in control and intervention arms of this trial. As per protocol, participants should receive only 4 additional doses of either agent

*The basis for the assumed risk (e.g. median control group risk across studies) is provided in footnotes. The corresponding risk (and its 95% confidence interval) is based on the assumed risk in the comparison group and the relative effect of the intervention (and its 95% CI).
CI: Confidence interval; RR: Risk ratio.

GRADE Working Group grades of evidence.
High quality: Further research is very unlikely to change our confidence in the estimate of effect.
Moderate quality: Further research is likely to have an important impact on our confidence in the estimate of effect and may change the estimate.
Low quality: Further research is very likely to have an important impact on our confidence in the estimate of effect and is likely to change the estimate.
Very low quality: We are very uncertain about the estimate.

ED: Emergency department.

IV: Intravenous.

INF: Intranasal fentanyl.

VAS: Visual analogue scale.

Figuras y tablas -
Table 1. Intranasal fentanyl (INF) versus intravenous morphine (IVM)

0 min

5 min

10 min

20 min

30 min

Intravenous morphine (mm)

67

42

41

35

33

Intranasal fentanyl (mm)

68

55

46

37

37

Difference (mm) (95% CI)

‐1 (‐12 to 9)

‐13 (‐23 to ‐3)

‐5 (‐16 to 7)

‐2 (‐13 to 10)

‐4 (‐16 to 8)

Borland 2007: Mean visual analogue score (mm) over time.

Figuras y tablas -
Table 1. Intranasal fentanyl (INF) versus intravenous morphine (IVM)
Table 2. High concentration intranasal fentanyl (HINF) versus standard concentration intranasal fentanyl (SINF)

SINF

HINF

P value

Before analgesia

80.0 (60.0‐95.5)

77.5 (60.0‐100)

0.881

10 min

49.5 (26.5‐68.5)

43.0 (15.2‐66.0)

0.176

20 min

27.5 (18.5‐56.5)

35.0 (9.0‐57.0)

0.758

30 min

20.0 (10.0‐46.0)

21.5 (4.75‐51.0)

0.662

Borland 2011: Median visual analogue pain score (mm) over time.

Figuras y tablas -
Table 2. High concentration intranasal fentanyl (HINF) versus standard concentration intranasal fentanyl (SINF)
Table 3. Intranasal fentanyl (INF) versus intramuscular morphine (IMM)

0 min

5 min

10 min

20 min

30 min

Intranasal fentanyl

4

3

1

1

1

Intramuscular morphine

4

3

2

2

1

Younge 1999: Median pain score (Wong Baker Faces, ordinal scoring 0‐5) over time.

Figuras y tablas -
Table 3. Intranasal fentanyl (INF) versus intramuscular morphine (IMM)