Critical Limb Ischemia
Conditions
Keywords
transcutaneous oximetry, oxygen, peripheral artery disease, follow-up
Brief summary
Transcutaneous oxygen tension (TcpO2) at rest, sensitized by oxygen inhalation tests, is widely applied for the evaluation of chronic critical limb ischemia (CLI). If foot TcpO2 measurements are good prognostic factors of the risk of amputation or the probability of wound healing without amputation, they have never proven their hability to estimate the risk of death in patients with critical limb ischemia. On the one hand, studies have considered only the response observed on legs without considered the thoracic variations. On the other hand, the variability of the TcpO2 signal has never been analyzed as a prognostic factor. The objective of the NOVICE study is therefore to assess, first, whether the variability of resting TcPO2 values at thoracic probe as well as at affected limb probe is a morbidity-mortality prognostic factor and secondly, to evaluate during the oxygen tests, if the measurement of the amplitude of the distal responses in ischemic zone compared to the response observed in thoracic probe is a prognostic factor of morbi-mortality.
Detailed description
This is an ambispective (both retrospective and prospective) cohort study in which any major patient, referred for resting (transcutyaneous oxygen pressure = TcpO2) for suspicion of critical limb ischemia, is included retrospectively and prospectively from November 2018 to October 2020. Tcpo2 recording are analysed to determine specific parameters (signal variability and response top oxygen). A morbidity-mortality follow-up is carried out between 12 and 15 months after the Tcpo2 measurement. A Kaplan Mayer study of these indices against MALE (major adverse lower limb events ) and MACE(Major adverse cardiovascular events) will be carried out.
Interventions
DIAGNOSTIC_TESTtranscutaneous oximetry
Analysis of transcutaneous oximetry (Tcpo2) in terme of variability at rest and of response to oxygen inhalation
Sponsors
University Hospital, Angers
Study design
Observational model
COHORT
Time perspective
OTHER
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* Suspicion of Critical limb ischemia * Reffered for Tcpo2 Absence of rebuttal to the use of the data by the patients
Exclusion criteria
* No available tcpo2 recording * Rejection of the follow up by the patients
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Mortality | 12 months | presence of MACE (major adverse cardiovascular event) following the oximetry test |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Morbidity | 12 moths | presence of MALE (major adverse lower limb event) following the oximetry test |
| Mortality (intermediate analysis) | 6 months minimal follow-up | Mortality all causes (intermediate analysis prior to Covid interference) |
Countries
France
Outcome results
None listed