Hip Prosthetic SurgeryPredi_HbNCT05605860
Development of a Predictive Algorithm for a Hemoglobin Value of Less Than 10 g/dl Postoperatively in Scheduled Hip or Knee Arthroplasty
An observational study of Hip Prosthetic Surgery and Knee Prosthetic Surgery, run by Fondation Hôpital Saint-Joseph at 1 site in France.
Trial summary
Hip (THR) or knee (KT) prosthetic surgery is a bleeding surgery with an average blood spoliation of about 1 liter and an average decrease of about 3 g/dl in hemoglobinemia (Hb). Consequently, anemia is observed postoperatively in almost all patients (between 85% and 99% depending on the preoperative Hb value). Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Hip Prosthetic Surgery, Knee Prosthetic Surgery
- How many people
- 1,041 participants
- Where
- 1 siteFrance
- Study dates
- 26 Jul 2022to 11 Sep 2023
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Study population: - Patient operated on for elective hip or knee arthroplasty within the Paris Saint Joseph hospital site (HPSJ) between January 1, 2019 and December 31, 2021. Over the 36-month period, 1281 patients underwent THP (approximately 60%) or TKP (approximately 40%) surgery.
Who may be able to join
- Patient operated on for elective hip or knee arthroplasty within the Paris Saint Joseph hospital site (HPSJ) between January 1, 2019 and December 31, 2021. Over the 36-month period, 1281 patients underwent THP (approximately 60%) or TKP (approximately 40%) surgery.
Who cannot join
- Patient who received iron infusion and/or injections of erythropoiesis stimulating agents within one month prior to surgery
- Patient who received an infusion of packed red blood cells in the month prior to surgery
- Absence of preoperative hemoglobinemia
- No postoperative hemoglobinemia
- Patient who had surgery in the previous month
- Patient operated on both sides (hip or knee) during the same operation
Show all 12Show fewer
- Patient operated in emergency
- Patient with a hereditary anemia
- Patient opposing the use of his data for this research
- Patient under guardianship or curatorship
- Patient deprived of liberty
- Patient under court protection
Trial locations and contacts
1 site in 1 country.
About this study
Hip (THR) or knee (KT) prosthetic surgery is a bleeding surgery with an average blood spoliation of about 1 liter and an average decrease of about 3 g/dl in hemoglobinemia (Hb). Consequently, anemia is observed postoperatively in almost all patients (between 85% and 99% depending on the preoperative Hb value). In all cases, anemia-related events delay the patient's recovery, favor the occurrence of complications and prolong the length of stay. The immediate treatment of acute postoperative anemia is based on transfusion of red blood cells (RBCs). However, this presents several risks for the patient. The first is immediate and associated with the procedure: risk of error with ABO/Rhesus incompatibility, sepsis, pulmonary edema, etc. The second is a medium-term risk, with an increased risk of infection after prosthetic hip or knee surgery. In the long term, immediate postoperative blood transfusion is associated with higher mortality. In order to reduce the likelihood of a patient receiving RGCs, strategies have been developed within a "Patient Blood Management" (PBM), which could be translated as "Personalized Blood Transfusion Management". This strategy is based on 3 pillars: preoperatively, to ensure a patient's hemoglobin level of at least 13 g/dl; during the procedure, to limit blood loss; and postoperatively, to limit the indications for blood transfusion and the number of RGCs to the strict necessary. As the main determinant to trigger the prescription of a blood transfusion is the Hb value, the objective is that the lowest value of hemoglobinemia (Hb_nadir) postoperatively is as close as possible to 10 g/dl. The objective of this study is to describe, by means of the data available in the computerized patient record of patients undergoing scheduled THR or PTG operations at the Paris Saint Joseph Hospital, a prediction equation for Hb_nadir < 10 g/dl and, thus, to prescribe iron and ESAs only in patients who require them.
- Conditions
- Hip Prosthetic Surgery, Knee Prosthetic Surgery
What is being measured
The primary outcome is the main question the study is designed to answer.
Validation of the statistical model for predicting patients with a postoperative hemoglobin value (Hb_nadir) will be < 10 g/dl
This outcome corresponds to the Quality of the prediction obtained on the validation cohort.
Measured: Year1
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted4 Nov 2022
- Study start26 Jul 2022
- Primary completion28 Oct 2022
- Study completion11 Sep 2023
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (6)Papers the sponsor has linked to this study.
- Other trials for Hip Prosthetic SurgeryStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Retrospective
- Enrolment
- 1,041 participants (actual)
Sponsor and investigators
- Lead sponsor
- Fondation Hôpital Saint-Joseph
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
- Investigators
- Pascal ALFONSI, MD, Principal investigator, Fondation Hôpital Saint-Joseph
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05605860
- Sponsor's protocol ID
- Predi_Hb
- Acronym
- Predi_Hb
- Status last verified
- Feb 2023
- First submitted
- 31 Oct 2022
- Last updated
- 13 Sep 2023
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Publications
Spahn DR. Anemia and patient blood management in hip and knee surgery: a systematic review of the literature. Anesthesiology. 2010 Aug;113(2):482-95. doi: 10.1097/ALN.0b013e3181e08e97.
PubMed 20613475Lasocki S, Krauspe R, von Heymann C, Mezzacasa A, Chainey S, Spahn DR. PREPARE: the prevalence of perioperative anaemia and need for patient blood management in elective orthopaedic surgery: a multicentre, observational study. Eur J Anaesthesiol. 2015 Mar;32(3):160-7. doi: 10.1097/EJA.0000000000000202.
PubMed 25564780Kim JL, Park JH, Han SB, Cho IY, Jang KM. Allogeneic Blood Transfusion Is a Significant Risk Factor for Surgical-Site Infection Following Total Hip and Knee Arthroplasty: A Meta-Analysis. J Arthroplasty. 2017 Jan;32(1):320-325. doi: 10.1016/j.arth.2016.08.026. Epub 2016 Aug 31.
PubMed 27682006Smilowitz NR, Oberweis BS, Nukala S, Rosenberg A, Zhao S, Xu J, Stuchin S, Iorio R, Errico T, Radford MJ, Berger JS. Association Between Anemia, Bleeding, and Transfusion with Long-term Mortality Following Noncardiac Surgery. Am J Med. 2016 Mar;129(3):315-23.e2. doi: 10.1016/j.amjmed.2015.10.012. Epub 2015 Oct 30.
PubMed 26524702Roque-Castellano C, Marchena-Gomez J, Farina-Castro R, Acosta-Merida MA, Armas-Ojeda MD, Sanchez-Guedez MI. Perioperative Blood Transfusion is Associated with an Increased Mortality in Older Surgical Patients. World J Surg. 2016 Aug;40(8):1795-801. doi: 10.1007/s00268-016-3521-2.
PubMed 27142623Jans O, Jorgensen C, Kehlet H, Johansson PI; Lundbeck Foundation Centre for Fast-track Hip and Knee Replacement Collaborative Group. Role of preoperative anemia for risk of transfusion and postoperative morbidity in fast-track hip and knee arthroplasty. Transfusion. 2014 Mar;54(3):717-26. doi: 10.1111/trf.12332. Epub 2013 Jul 5.
PubMed 23829298
Study at a glance
From the registry record, last updated by the sponsor on 13 Sep 2023. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Development of a Predictive Algorithm for a Hemoglobin Value of Less Than 10 g/dl Postoperatively in Scheduled Hip or Knee Arthroplasty
- ClinicalTrials.gov ID
- NCT05605860
- Acronym / sponsor ID
- Predi_Hb / Predi_Hb
- Conditions
- Hip Prosthetic Surgery, Knee Prosthetic Surgery
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 1,041 participants (actual)
- Lead sponsor
- Fondation Hôpital Saint-JosephUniversity, hospital or other
- Study start
- 26 Jul 2022 (actual)
- Primary completion
- 28 Oct 2022 (actual)
- Study completion
- 11 Sep 2023 (actual)
- First posted
- 4 Nov 2022 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Hip (THR) or knee (KT) prosthetic surgery is a bleeding surgery with an average blood spoliation of about 1 liter and an average decrease of about 3 g/dl in hemoglobinemia (Hb). Consequently, anemia is observed postoperatively in almost all patients (between 85% and 99% depending on the preoperative Hb value). In all cases, anemia-related events delay the patient's recovery, favor the occurrence of complications and prolong the length of stay. The immediate treatment of acute postoperative anemia is based on transfusion of red blood cells (RBCs). However, this presents several risks for the patient. The first is immediate and associated with the procedure: risk of error with ABO/Rhesus incompatibility, sepsis, pulmonary edema, etc. The second is a medium-term risk, with an increased risk of infection after prosthetic hip or knee surgery. In the long term, immediate postoperative blood transfusion is associated with higher mortality. In order to reduce the likelihood of a patient receiving RGCs, strategies have been developed within a "Patient Blood Management" (PBM), which could be translated as "Personalized Blood Transfusion Management". This strategy is based on 3 pillars: preoperatively, to ensure a patient's hemoglobin level of at least 13 g/dl; during the procedure, to limit blood loss; and postoperatively, to limit the indications for blood transfusion and the number of RGCs to the strict necessary. As the main determinant to trigger the prescription of a blood transfusion is the Hb value, the objective is that the lowest value of hemoglobinemia (Hb_nadir) postoperatively is as close as possible to 10 g/dl. The objective of this study is to describe, by means of the data available in the computerized patient record of patients undergoing scheduled THR or PTG operations at the Paris Saint Joseph Hospital, a prediction equation for Hb_nadir < 10 g/dl and, thus, to prescribe iron and ESAs only in patients who require them.
Study design
- Observational model
- Cohort
- Time perspective
- Retrospective
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- - Patient operated on for elective hip or knee arthroplasty within the Paris Saint Joseph hospital site (HPSJ) between January 1, 2019 and December 31, 2021. Over the 36-month period, 1281 patients underwent THP (approximately 60%) or TKP (approximately 40%) surgery.
Key inclusion criteria (1 listed)
- Patient operated on for elective hip or knee arthroplasty within the Paris Saint Joseph hospital site (HPSJ) between January 1, 2019 and December 31, 2021. Over the 36-month period, 1281 patients underwent THP (approximately 60%) or TKP (approximately 40%) surgery.
Key exclusion criteria (12 listed)
- Patient who received iron infusion and/or injections of erythropoiesis stimulating agents within one month prior to surgery
- Patient who received an infusion of packed red blood cells in the month prior to surgery
- Absence of preoperative hemoglobinemia
- No postoperative hemoglobinemia
- Patient who had surgery in the previous month
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Validation of the statistical model for predicting patients with a postoperative hemoglobin value (Hb_nadir) will be < 10 g/dl
Time frame: Year1
This outcome corresponds to the Quality of the prediction obtained on the validation cohort.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 13 Sep 2023.
- Background: PubMed 20613475Spahn DR. Anemia and patient blood management in hip and knee surgery: a systematic review of the literature. Anesthesiology. 2010 Aug;113(2):482-95. doi: 10.1097/ALN.0b013e3181e08e97.
- Background: PubMed 25564780Lasocki S, Krauspe R, von Heymann C, Mezzacasa A, Chainey S, Spahn DR. PREPARE: the prevalence of perioperative anaemia and need for patient blood management in elective orthopaedic surgery: a multicentre, observational study. Eur J Anaesthesiol. 2015 Mar;32(3):160-7. doi: 10.1097/EJA.0000000000000202.
- Background: PubMed 27682006Kim JL, Park JH, Han SB, Cho IY, Jang KM. Allogeneic Blood Transfusion Is a Significant Risk Factor for Surgical-Site Infection Following Total Hip and Knee Arthroplasty: A Meta-Analysis. J Arthroplasty. 2017 Jan;32(1):320-325. doi: 10.1016/j.arth.2016.08.026. Epub 2016 Aug 31.
- Background: PubMed 26524702Smilowitz NR, Oberweis BS, Nukala S, Rosenberg A, Zhao S, Xu J, Stuchin S, Iorio R, Errico T, Radford MJ, Berger JS. Association Between Anemia, Bleeding, and Transfusion with Long-term Mortality Following Noncardiac Surgery. Am J Med. 2016 Mar;129(3):315-23.e2. doi: 10.1016/j.amjmed.2015.10.012. Epub 2015 Oct 30.
- Background: PubMed 27142623Roque-Castellano C, Marchena-Gomez J, Farina-Castro R, Acosta-Merida MA, Armas-Ojeda MD, Sanchez-Guedez MI. Perioperative Blood Transfusion is Associated with an Increased Mortality in Older Surgical Patients. World J Surg. 2016 Aug;40(8):1795-801. doi: 10.1007/s00268-016-3521-2.
- Background: PubMed 23829298Jans O, Jorgensen C, Kehlet H, Johansson PI; Lundbeck Foundation Centre for Fast-track Hip and Knee Replacement Collaborative Group. Role of preoperative anemia for risk of transfusion and postoperative morbidity in fast-track hip and knee arthroplasty. Transfusion. 2014 Mar;54(3):717-26. doi: 10.1111/trf.12332. Epub 2013 Jul 5.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Pascal ALFONSI, MD principal investigator
Fondation Hôpital Saint-Joseph
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Hip Prosthetic Surgery and Knee Prosthetic Surgery, run by Fondation Hôpital Saint-Joseph at 1 site in France.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 12 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 13 Sep 2023. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in France. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Validation of the statistical model for predicting patients with a postoperative hemoglobin value (Hb_nadir) will be < 10 g/dl (time frame: Year1). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT05605860, which also lists 6 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 13 Sep 2023; AzTrials last refreshed its copy on 30 Oct 2026.