An observational study in Hypersensitivity, Immediate and Perioperative Period, sponsored by Assistance Publique - Hôpitaux de Paris. Completed at 1 site in France. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-04-06.
Sponsored by Assistance Publique - Hôpitaux de Paris · Observational
The clinical presentation of perioperative allergic and non-allergic clinical reactions is often considered undistinguishable while the accurate analysis of clinical cases shows striking clinical differences which might be predictive of the etiological diagnosis (allergic versus non-allergic).
The four-step Ring and Messmer clinical scale helps to guide acute management of immediate hypersensitivity accordingly to the clinical presentation although this scale does not take into account the mechanism involved (i.e. allergic versus non-allergic). Non-allergic clinical reactions are usually non-life-threatening and may, sometimes, spontaneously resolve in contrast to allergic reactions which are mainly severe and life-threatening conditions, typically called anaphylaxis.
The cornerstones of anaphylaxis management are fluid therapy and epinephrine. However, poor outcome has been reported as a result of delayed treatment and/or inappropriate management of perioperative anaphylaxis.
The main objectives of this study are to: i) characterize the clinical and paraclinical determinants of IgE-mediated allergy that could be correlated to the ultimate diagnosis; and ii) elaborate a decision-making algorithm for clinical patterns identification of perioperative allergic reactions to guide acute management, thus potentially decreasing the related morbidity and mortality.
The secondary objectives are to: i) suggest a modification of the Ring and Messmer scale according to the phenotypes involved; ii) identify the clinical characteristics of isolated non-allergic bronchospasm; iii) compare the most frequent agents involved in perioperative IgE-mediated allergy to those reported in the international studies; iv) identify the negative predictive values of skin tests in allergic and non-allergic patients; v) compare the therapeutic modalities used to those recommended in the literature; vi) describe the cases of morbidity and mortality and identify the potential risk factors.
The Ring and Messmer scale is used to quote the clinical features occurring in drug- or latex-induced immediate hypersensitivity and has been adapted to the perioperative setting as follows:
Grade I: Muco-cutaneous signs only (generalized erythema and/or extensive urticaria and/or angioedema) Grade II: Mucocutaneous signs, hypotension, tachycardia and/or moderate bronchospasm Grade III: Mucocutaneous signs, cardiovascular collapse, tachycardia or bradycardia, bronchospasm, digestive signs Grade IV: Cardiac arrest Grade V: Death
Perioperative immediate hypersensitivity reaction requires further allergologic assessment.
The allergologic assessment is performed a few weeks after the reaction to confirm or disprove an allergic mechanism behind the reaction (i.e. allergy versus non-allergy), and to identify culprit agent(s) and safe drugs, including suitable alternatives. It is based on the review of the details of the reaction along with histamine and/or tryptase levels and specific Immunoglobulin E levels (when available) and skin tests results.
Plasma histamine and/or tryptase levels and Immunoglobulin E levels are measured at the time of the reaction. Acute tryptase levels are compared to baseline tryptase measured at least 24 hours after the reaction or when the patient is referred for allergological investigation. Skin tests, including prick-tests and intradermal tests, are performed during the allergological assessment.
82 studies on the registry are indexed under Hypersensitivity, Immediate; 7 are open to participants now.
This study's enrollment of 145 is close to the median of 159 across 11 observational studies indexed under Hypersensitivity, Immediate.
Browse Hypersensitivity, Immediate studies →Assistance Publique - Hôpitaux de Paris is the lead sponsor of 3,592 studies on the registry; 1,033 are open to participants now.
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Patients having experienced a perioperative immediate hypersensitivity where the allergological assessment was performed by the collaborators of this study
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.
Hypersensitivity
An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Patients having experienced perioperative immediate hypersensitivity
Identification of the predictive muco-cutaneous signs of perioperative allergic immediate hypersensitivity as assessed by the Ring and Messmer clinical scale
muco-cutaneous signs (generalized erythema and/or extensive urticaria and/or angioedema)
Time frame: From date of the perioperative clinical reaction up to 6 hours
Identification of the predictive heart rate of perioperative allergic immediate hypersensitivity as assessed by the Ring and Messmer clinical scale
heart rate (beat/min.)
Time frame: From date of the perioperative clinical reaction up to 6 hours
Identification of the predictive arterial pressure of perioperative allergic immediate hypersensitivity as assessed by the Ring and Messmer clinical scale
arterial pressure (mmHg)
Time frame: From date of the perioperative clinical reaction up to 6 hours
Identification of the predictive upper gastrointestinal symptoms of perioperative allergic immediate hypersensitivity as assessed by the Ring and Messmer clinical scale
digestive signs (vomiting)
Time frame: From date of the perioperative clinical reaction up to 6 hours
Identification of the predictive lower gastrointestinal symptoms of perioperative allergic immediate hypersensitivity as assessed by the Ring and Messmer clinical scale
digestive signs (diarrhea)
Time frame: From date of the perioperative clinical reaction up to 6 hours
Identification of recurrence of perioperative allergic immediate hypersensitivity as assessed by the Ring and Messmer clinical scale
recurrence of symptoms following a symptom-free response
Time frame: From date of the perioperative clinical reaction up to 6 hours
Drugs involved in adverse reactions as assessed by the Ring and Messmer clinical scale
To identify the drugs involved in the onset of perioperative allergic clinical reactions and compare our results to those provided in the different international epidemiologic studies regarding perioperative immediate hypersensitivity.
Time frame: From date of the perioperative clinical reaction and up to 100 months
Negative predictive values of skin tests in allergic and non-allergic patients
Negative skin-tested agents administered according to the results of allergological follow-up during subsequent anesthetics in allergic and non-allergic patients
Time frame: Up to 5 years after the allergologic follow-up
Participants with treatment-related adverse events as assessed by by CTCAE v4.0 and fluid therapy
To identify the number of patients who received fluid therapy (volume, type) in allergic hypersensitivity
Time frame: Through study completion, an average of 2 years
participants with treatment-related adverse events as assessed by CTCAE v4.0 and vasoconstrictive agents
To identify the number of patients who received vasoconstrictive agents (ephedrine, neosynephrine, epinephrine, norepinephrine) and corresponding cumulative doses
Time frame: Through study completion, an average of 2 years
participants with treatment-related adverse events as assessed by CTCAE v4.0 and salbutamol and/or steroids
To identify the number of patients who received salbutamol, steroids and corresponding doses
Time frame: Through study completion, an average of 2 years
Participants with treatment-related adverse events as assessed by CTCAE v4.0 and intensive care unit admission
To identify the number of patients who were admitted in intensive care unit
Time frame: Through study completion, an average of 2 years
Participants with treatment-related adverse events as assessed by CTCAE v4.0 and morbidity
To report the morbidity cases including cardiac and/or renal and/or hepatic and/or neurologic failure(s) after perioperative allergic immediate hypersensitivity
Time frame: Through study completion, an average of 2 years
Participants with treatment-related adverse events as assessed by CTCAE v4.0 and mortality
To report the mortality cases after perioperative allergic immediate hypersensitivity
Time frame: Through study completion, an average of 2 years
Plan to share: No
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This study is completed, as verified in Mar 2019. You cannot join it, but the record below documents what was studied.
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