Blood Transfusion Incidence, Risk Factors, and Associated Complications in Surgical Treatment of Hip Dysplasia

Analysis of the incidence and risk factors of blood transfusion in total knee revision: a retrospective nationwide inpatient sample database study

OBJECTIVE

This study sought to determine the incidence and risk factors of blood transfusion among patients undergoing total knee revision (TKR) using a nationwide database.

METHODS

A retrospective data analysis was conducted based on the Nationwide Inpatient Sample (NIS), enrolling patients who underwent TKR from 2010 to 2019 with complete information. The patients were divided into two groups based on whether they received blood transfusion or not. The demographic characteristics (race, sex, and age), length of stay (LOS), total charge of hospitalization, hospital characteristics (admission type, insurance type, bed size, teaching status, location, and region of hospital), hospital mortality, comorbidities, and perioperative complications were analyzed. Finally, we conducted univariate and multivariate logistic regression to identify factors that were associated with TKR patients to require blood transfusion.

RESULTS

The NIS database included 115,072 patients who underwent TKR. Among them, 14,899 patients received blood transfusion, and the incidence of blood transfusion was 13.0%. There was a dramatic decrease in the incidence over the years from 2010 to 2019, dropping from 20.4 to 6.5%. TKR patients requiring transfusions had experienced longer LOS, incurred higher total medical expenses, utilized Medicare more frequently, and had increased in-hospital mortality rates (all P < 0.001). Independent predictors for blood transfusion included advanced age, female gender, iron-deficiency anemia, rheumatoid disease, chronic blood loss anemia, congestive heart failure, coagulopathy, uncomplicated diabetes, lymphoma, fluid and electrolyte disorders, metastatic carcinoma, other neurological diseases, paralysis, peripheral vascular disorders, pulmonary circulation disorders, renal failure, valvular disease, and weight loss. In addition, risk factors for transfusion in TKR surgery included sepsis, acute myocardial infarction, deep vein thrombosis, pulmonary embolism, gastrointestinal bleeding, heart failure, renal insufficiency, pneumonia, wound infection, lower limb nerve injury, hemorrhage/seroma/hematoma, wound rupture/non healing, urinary tract infection, acute renal failure, and postoperative delirium.

CONCLUSIONS

Our findings highlight the importance of recognizing the risk factors of blood transfusion in TKR to reduce the occurrence of adverse events.

Pediatric Hip Dysplasia Surgery Outcomes by Pediatric Versus Nonpediatric Orthopedists

Objectives Developmental dysplasia of the hip (DDH) encompasses a spectrum of abnormalities in the immature hip. Surgical intervention is indicated if conservative management fails. Despite the increased supply of pediatric orthopedic surgeons (POSs) over the last few decades, there continues to be a maldistribution of surgeons. The purpose of this study is to determine outcomes following surgical management of hip dysplasia by POSs compared to non-pediatric orthopedic surgeons. Methods Pediatric patients who underwent surgical treatment for hip dysplasia from 2012 to 2019 were identified using a large national database. Patient demographics, comorbidities, and postoperative complications were compared by pediatric versus nonpediatric-trained orthopedic surgeons. Bivariate and multivariable regression analyses were performed. Results Of the 10,780 pediatric patients who underwent hip dysplasia surgery, 10,206 patients (94.7%) were operated on by a POS, whereas 574 (5.3%) were operated on by a non-pediatric orthopedic surgeon. POSs were more likely to operate on patients with a higher American Society of Anesthesiologists class (p<0.001) and those with a greater number of medical comorbidities, including cardiac (p=0.001), gastrointestinal (p=0.017), and neurological (p<0.001). Following analysis using multivariable regression models to control for patient baseline characteristics, there were no differences in any postoperative complications between patients treated by pediatric-trained and nonpediatric-trained orthopedic surgeons. Conclusions Compared to non-pediatric orthopedic surgeons, POSs were more likely to operate on younger patients with increased medical comorbidities. However, there were no differences in postoperative complications following surgical management for DDH in patients treated by nonpediatric and pediatric orthopedic surgeons.

Comparing pediatric femoral shaft fracture repair patient outcomes between pediatric and non-pediatric orthopedic surgeons

INTRODUCTION

While pediatric femoral shaft fractures account for less than 2% of all fractures in children, they are the most common pediatric fracture requiring hospitalization. Management of pediatric femoral shaft fractures is challenging, with various treatment options relating to severity and patient age. The last few decades have seen an increased supply of pediatric orthopedic surgeons (POS) along with increased referral rates. However, there continues to be a maldistribution of POS throughout the country. This study sought to determine outcomes following femoral shaft fracture repair by POS compared to non-pediatric trained orthopedic surgeons.

METHODS

The National Surgical Quality Improvement Program-Pediatric database was queried to identify pediatric patients who underwent open treatment of femoral shaft fracture from 2012 to 2019. Differences in patient demographics, comorbidities, and postoperative complications were assessed and compared between patients who were treated by pediatric subspecialty-trained orthopedic surgeons and those treated by non-pediatric orthopedic surgeons. Bivariate and multivariable regression analyses were utilized.

RESULTS

Of the 5862 pediatric patients who underwent femoral shaft fracture treatment, 4875 (83.2%) had their surgeries performed by a POS whereas 987 (16.8%) were operated on by a non-pediatric surgeon. POS were more likely to operate on patients with a higher American Society of Anesthesiologists classification (p < 0.001) and those with medical comorbidities, including gastrointestinal (p = 0.022) and neurological (p < 0.001). After controlling for baseline patient characteristics on multivariable regression analysis, patients treated by non-pediatric orthopaedic surgeons are at an increased risk of prolonged hospital stay (OR 2.595; p < 0.001) when compared to patients operated on by POS.

CONCLUSION

The results indicated that patients undergoing surgical treatment for a femoral shaft fracture by a non-pediatric trained orthopedic surgeon were at increased risk of a prolonged hospital stay compared to those being treated by POS. Additionally, POS were more likely to operate on more difficult patients with increased comorbidities.

Tranexamic Acid in Hip Reconstructions in Children with Cerebral Palsy: A Double-Blind Randomized Controlled Clinical Trial

Surgical treatment is indicated for hip dislocation in patients with cerebral palsy (CP), but it requires care due to the state of nutrition and associated clinical comorbidities. The use of resources that minimize blood loss and the need for blood transfusions are essential to avoid complications. Tranexamic acid (TXA) has been highlighted for orthopedic surgeries to control intraoperative bleeding; however, there is a lack of large studies for its use in hip surgeries in patients with CP. This study aims to evaluate the efficacy and safety of tranexamic acid to reduce bleeding in pediatric patients with cerebral palsy undergoing surgical treatment for hip instability. A sample of 31 patients with CP who underwent surgical treatment for hip dislocation (hip adductor stretching, varization osteotomy of the proximal femur and acetabuloplasty using the Dega technique) was randomly divided into groups: control (n = 10) and TXA (n = 21). Preoperative and 24 h hemoglobin concentrations, the length of hospital stay (LHS), and intraoperative bleeding (IB) were analyzed. TXA significantly reduced the IB (p = 0.02). The variance in hemoglobin concentration was lower for the TXA group, but without statistical significance (p = 0.06). There was no difference in LHS. Also, no statistical difference was observed for the number of transfusions (p = 0.08). The findings provide evidence of the effectiveness of TXA in decreasing intraoperative bleeding and its safety for use in pediatric patients with cerebral palsy.

Evaluating the association between race and complications following pediatric upper extremity surgery

Race can influence perioperative care and outcomes in adult and pediatric orthopedic surgery. However, no prior study has evaluated any associations between race and complications following upper extremity surgery in pediatric patients. Thus, the purpose of this study was to evaluate whether there are any differences in risks for complications, readmission, or mortality following upper extremity surgery between African American and Caucasian pediatric patients. Pediatric patients who had a primary upper extremity procedure from 2012 to 2019 were identified in the National Surgical Quality Improvement Program-Pediatric database. Patients were categorized into two cohorts: patients who were Caucasian and patients who were African American. Differences in demographics, comorbidities, and postoperative complications were assessed and compared between the two-patient population using bivariate and multivariable regression analyses. Of the 25 848 pediatric patients who underwent upper extremity surgeries, 21 693 (83.9%) were Caucasian, and 4155 (16.1%) were African American. Compared to Caucasian patients, African American patients were more likely to have a higher American Society of Anesthesiologists classification ( P  < 0.001), as well as pulmonary comorbidities ( P  < 0.001) and hematologic disorders ( P  = 0.004). Following adjustment on multivariable regression analysis to control for baseline characteristics, there were no differences in any postoperative complications between Caucasian and African American patients. In conclusion, African American pediatric patients are not at an increased risk for postoperative complications compared to Caucasian patients following upper extremity surgery. Race should not be used independently when evaluating patient risk for postoperative complications. Level of Evidence: III.

Racial disparities in readmission rates following surgical treatment of pediatric developmental dysplasia of the hip

PURPOSE

Across orthopedic subspecialties, significant racial disparities have been identified with regard to postoperative outcomes. Despite these findings among adult patients, the literature assessing these disparities within pediatric orthopedics is limited. The purpose of this study was to determine the independent predictors for unplanned readmission following surgical treatment of developmental dysplasia of the hip.

METHODS

Pediatric patients undergoing hip dysplasia surgery from 2012 to 2019 were identified in the National Surgical Quality Improvement Program-Pediatric database. Two patient groups were defined: patients who had unplanned hospital readmission within 30 days of surgery and patients who were not readmitted. Clinical characteristics assessed included gender, race, and American Society of Anesthesiologists (ASA) class. Risk factors for complications were assessed using bivariate and multivariate analysis.

RESULTS

Of 6561 pediatric patients undergoing surgical treatment for hip dysplasia, 540 (8.2%) had unplanned readmission. On bivariate analysis, non-white race (Black, Asian, Hispanic, American Indian, and Native Hawaiian), an ASA class of III, IV, or V, pulmonary, renal, neurological, and gastrointestinal comorbidities, as well as immune disease, steroid use, and nutritional support were significantly associated with unplanned readmission (p < 0.05 for all). After controlling for confounding variables on multivariate analysis, non-white race (OR 1.46; p = 0.042) and ASA class of III-V (OR 2.21; p = 0.002) were found to be independent predictors for readmission.

CONCLUSION

Clinicians should be advised of the increased readmission rates observed in non-white patients and those of higher ASA scores. Further work is needed to combat existing disparities within pediatric orthopedics.

Is seizure disorder a risk factor for complications following surgical treatment of hip dysplasia in the pediatric population?

The impact of seizure disorders on pediatric patients who undergo hip dysplasia surgery has yet to be elucidated. This study focused on identifying the effect of seizure disorders on the incidence of complications following surgical management of hip dysplasia. Pediatric patients undergoing surgical treatment for hip dysplasia from 2012 to 2019 were identified in the National Surgical Quality Improvement Program-Pediatric database. Patients were divided into two cohorts: patients with and patients without a seizure disorder. Patient demographics, comorbidities and postoperative outcomes were compared between the two groups. Bivariate and multivariate analyses were performed. Of 10 853 pediatric patients who underwent hip dysplasia surgery, 8117 patients (74.8%) did not have a seizure disorder whereas 2736 (25.2%) had a seizure disorder. Bivariate analyses revealed that compared to patients without a seizure disorder, patients with a seizure disorder were at increased risk of developing surgical site infections, pneumonia, unplanned reintubation, urinary tract infection, postoperative transfusion, sepsis, extended operation time and length of stay and readmission ( P  < 0.05 for all). Following adjustment for patient demographics and comorbidities on multivariate analysis, there were no differences in any postoperative complications between pediatric patients with and without a seizure disorder. There were no differences in 30-day postoperative complications in patients with and without a seizure disorder. Due to potential decreased bone mineral density as an effect of antiepileptic drugs and the risk of femur fracture during surgery for hip dysplasia, pediatric patients with a seizure disorder should be closely monitored as they may be more susceptible to injury. Level of Evidence: III.

Racial Disparities in Outcomes Following Open Treatment of Pediatric Femoral Shaft Fractures

Introduction Femoral shaft fractures are a common pediatric injury that can require non-operative or operative management. Several studies have shown that race impacts pain management and a number of emergency department visits in the pediatric femur fracture population. This study aimed to investigate any association between pediatric patient race and number of comorbidities, 30-day postoperative outcomes, and length of stay following open surgical treatment of femoral shaft fractures. Methods Pediatric patients who underwent open treatment of femoral shaft fracture were identified in the National Surgical Quality Improvement Program-Pediatric database from 2012-2019. Patients were categorized into two cohorts: White and underrepresented minority (URM). URM groups included Black or African American, Hispanic, Native American or Alaskan, and Native Hawaiian or Pacific Islander. Demographics, comorbidities, and postoperative complications were compared using bivariate and multivariable regression analyses. Results Of the 5,284 pediatric patients who underwent open treatment of femoral shaft fracture, 3,650 (69.1%) were White, and 1,634 (30.9%) were URM. Compared to White patients, URM patients were more likely to have a higher American Society of Anesthesiologists score (p=0.012), more likely to have pulmonary comorbidities (p=0.005), require preoperative blood transfusion (p=0.006), and have an increased risk of prolonged hospital stay (OR 2.36; p=0.007). Conclusion Pediatric URM patients undergoing open treatment of femoral shaft fractures have an increased risk of extended hospital stay postoperatively compared to White patients. As the racial and ethnic constitution of the pediatric population changes, understanding racial and ethnic health disparities will be crucial to providing equitable care to all patients.

Factors affecting need for blood transfusion in paediatric patients undergoing open surgery for hip dysplasia

BACKGROUND AND OBJECTIVES

The management of intraoperative blood loss in the surgical treatment of paediatric hip dysplasia is resource intensive. There are numerous clinical factors that impact the need for intraoperative transfusion. Identification of patient and surgical factors associated with increased blood loss may reduce the unnecessary use of resources. This study aimed to identify factors predictive of intraoperative transfusion in children undergoing hip dysplasia surgery.

MATERIALS AND METHODS

This is a single-centre retrospective review of patients undergoing surgery for hip dysplasia from 1 January 2012 to 15 April 2021. Patient demographic factors, anaesthetic, surgical and transfusion histories were reviewed. Multivariable logistic regression analysis was performed to identify factors predictive of allogeneic red blood cell transfusion requirements during the intraoperative period.

RESULTS

This study includes 595 patients who underwent open surgery for hip dysplasia, including 297 (52.6%) classified as developmental dysplasia (DD) and 268 (47.3%) as neuromuscular (NM) with a mean age of 9.1 years (interquartile range 3-14). Intraoperative allogeneic transfusion was identified in 26/297 (8.8%) DD and 73/268 (27.2%) NM patients. Adjusted factors associated with increased odds of intraoperative transfusion were NM (odds ratio [OR] = 2.96, 95% confidence interval [CI] [1.76, 5.00]) and the number of osteotomies performed (OR = 1.82/osteotomy, 95% CI [1.40, 2.35]). Adjusted factors that reduced the odds of transfusion were the use of antifibrinolytics (OR = 0.35, 95% CI [0.17, 0.71]) and regional anaesthesia (OR = 0.52, 95% CI [0.29, 0.94]).

CONCLUSION

For children undergoing surgery for hip dysplasia, the number of osteotomies performed is predictive of the need for allogeneic blood transfusion. Antifibrinolytics and regional anaesthesia are associated with reduced risk for allogeneic blood transfusion. Blood management initiatives, such a preoperative optimization of haemoglobin and the use of antifibrinolytics, could target patients at increased risk of intraoperative bleeding and transfusion.

Developmental delay: is this pediatric patient population at risk for complications following open treatment of femoral shaft fracture?

PURPOSE

Femoral shaft fractures are common in the pediatric population, accounting for over 20% of inpatient pediatric fractures. Patients with developmental delays are a population group whose medical care and recovery come with a unique set of considerations and challenges. The purpose of this study was to evaluate the impact of developmental delay on outcomes following open treatment of femoral shaft fractures in the pediatric population.

METHODS

Pediatric patients undergoing open treatment of femoral shaft fracture from 2012 to 2019 were identified in the National Surgical Quality Improvement Program-Pediatric database. Patients were divided into two groups: patients with developmental delay and patients without developmental delay. Patient demographics, comorbidities, and various postoperative outcomes were compared between the two groups using bivariate and multivariate analyses.

RESULTS

Of the 5896 pediatric patients who underwent open treatment of femoral shaft fracture, 5479 patients (92.9%) did not have developmental delay whereas 417 (7.1%) had developmental delay. Patients with developmental delay were more likely to have other medical comorbidities. Following adjustment on multivariable regression analysis to control for the baseline differences between the two groups, patients with developmental delay had an increased risk of readmission to the hospital (OR 4.762; p = 0.014).

CONCLUSION

Developmental delay in the pediatric population was found to be an independent risk factor for hospital readmission following open treatment of femoral shaft fractures. Taking these patients into special consideration when evaluating the optimal treatment plan can be beneficial to reduce the risks of readmission, which can decrease costs for both the patient and the hospital.

Perioperative blood transfusions in hip and knee arthroplasty: a retrospective assessment of combined risk factors

INTRODUCTION

Accurate identification of patients at risk of blood transfusion can reduce complications and improve institutional resource allocation. Probabilistic models are used to detect risk factors and formulate patient blood management strategies. Whether these predictors vary among institutions is unclear. We aimed to identify risk factors among our patients who underwent total hip (THA) or knee (TKA) arthroplasty, and combine these predictors to improve our model.

MATERIALS AND METHODS

We retrospectively assessed risk factors among 531 adults who underwent elective THA or TKA from January 2016 to November 2018. Using relevant surgical and patient characteristics gathered from electronic medical records, we conducted univariable and multivariable analyses. For our logistic regression model, we measured the impact of independent variables (age, gender, operation type (THA or TKA) and preoperative hemoglobin concentration) on the need for a transfusion.

RESULTS

Of the 531 patients, 321 had THA (uncemented) and 210 had TKA. For the selected period, our transfusion rate of 8.1% (10.6% THA and 4.3% TKA) was low. Univariable analyses showed that lower BMI (p < 0.001) was associated with receiving a transfusion. Important factors identified through logistic regression analyses were age (estimated effect of an interquartile range increase in age: OR 3.89 [CI 95% 1.96-7.69]), TKA (OR - 0.77 [CI 95% - 1.57-0.02]), and preoperative hemoglobin levels (estimated effect of interquartile range increase in hemoglobin: OR 0.47 [CI 95% 0.31-0.71]). Contrary to findings from previous reports, gender was not associated with transfusion.

CONCLUSIONS

Previously published predictors such as advanced age, low preoperative hemoglobin, and procedure type (THA) were also identified in our analysis. However, gender was not a predictor, and BMI showed the potential to influence risk. We conclude that, when feasible, the determination of site-specific transfusion rates and combined risk factors can assist practitioners to customize care according to the needs of their patient population.

LEVEL OF EVIDENCE

Level 3, retrospective cohort study.

Evaluating the association between pulmonary abnormalities and complications following pediatric hip dysplasia surgery

PURPOSE

Developmental dysplasia of the hip (DDH) encompasses a wide range of abnormal hip development and is a common condition in the pediatric population. Congenital pulmonary abnormalities are typically mild in the pediatric population but can be associated with severe comorbid conditions. The purpose of this study was to analyze the effect of structural pulmonary/airway abnormalities on the incidence of postoperative complications following surgical management of DDH.

METHODS

From 2012 to 2019, the National Surgical Quality Improvement Program-Pediatric database was utilized to identify pediatric patients undergoing surgical treatment for hip dysplasia. Patients were stratified into two groups: patients with a structural pulmonary/airway abnormality and patients without a pulmonary abnormality. Patient demographics, comorbidities, and postoperative complications were compared between the two cohorts with the use of various statistical analyses, including bivariate and multivariate analyses.

RESULTS

Of the 10,853 patients who underwent surgical treatment for hip dysplasia, 10,157 patients (93.6%) did not have a structural pulmonary/airway abnormality whereas 696 (6.4%) had an airway abnormality. Following adjustment on multivariate analysis, patients with a structural pulmonary abnormality had an increased risk of cardiac arrest requiring cardiopulmonary resuscitation (OR 2.342; p = 0.045).

CONCLUSION

The results indicated that patients with a structural pulmonary abnormality had an increased risk of cardiac arrest requiring cardiopulmonary resuscitation compared to those without a pulmonary abnormality. Ensuring appropriate preoperative evaluation with a multidisciplinary team and close monitoring postoperatively is important to prevent the risk of severe outcomes in this vulnerable patient population.

Racial Disparities in Postoperative Outcomes Following Operative Management of Pediatric Developmental Dysplasia of the Hip

BACKGROUND

Developmental dysplasia of the hip in pediatric patients can be managed conservatively or operatively. Understanding patient risk factors is important to optimize outcomes following surgical treatment of developmental dysplasia of the hip. Racial disparities in procedural outcomes have been studied, however, there is scarce literature on an association between race and complications following pediatric orthopaedic surgery. Our study aimed to determine the association between pediatric patients' race and outcomes following operative management of hip dysplasia by investigating 30-day postoperative complications and length of hospital stay.

METHODS

The National Surgical Quality Improvement Program-Pediatric database was utilized from the years 2012 to 2019 to identify all pediatric patients undergoing surgical treatment for hip dysplasia. Patients were stratified into 2 groups: patients who were White and patients from underrepresented minority (URM) groups. URM groups included those who were Black or African American, Hispanic, Native American or Alaskan, and Native Hawaiian or Pacific Islander. Differences in patient demographics, comorbidities, and postoperative outcomes were compared between the 2 cohorts using bivariate and multivariate analyses.

RESULTS

Of the 9159 pediatric patients who underwent surgical treatment for hip dysplasia between 2012 and 2019, 6057 patients (66.1%) were White and 3102 (33.9%) were from URM groups. In the bivariate analysis, compared with White patients, patients from URM groups were more likely to experience deep wound dehiscence, pneumonia, unplanned reintubation, cardiac arrest, and extended length of hospital stay. Following multivariate analysis, patients from URM groups had an increased risk of unplanned reintubation (odds ratio: 3.583; P=0.018).

CONCLUSIONS

Understanding which patient factors impact surgical outcomes allows health care teams to be more aware of at-risk patient groups. Our study found that pediatric patients from URM groups who underwent surgery for correction of hip dysplasia had greater odds of unplanned reintubation when compared with patients who were White. Further research should investigate the relationship between multiple variables including race, low socioeconomic status, and language barriers on surgical outcomes following pediatric orthopaedic procedures.

LEVEL OF EVIDENCE

Level III-retrospective cohort analysis.

Prioritizing Elective Surgical Cases During a Pandemic or Global Crisis: The Elective-Pediatric Orthopedic Surgical Timing (E-POST) Score

BACKGROUND

As the first wave of the COVID-19 pandemic stabilized and resources became more readily available, elective surgery was reinitiated and hospitals realized that there was little guidance on how to prioritize elective cases.

METHODS

A prioritization tool was formulated based on clinically relevant elements and previous literature. Nine pediatric orthopaedic surgeons from North American institutions evaluated 25 clinical scenarios on 2 occasions separated in time. Intra-rater and inter-rater reliability were calculated [intraclass correlation coefficient (ICC)]. Surgeons also ranked the importance of each element and how confident they were with scoring each factor.

RESULTS

Intra-rater ICC for total score showed good to excellent consistency; highest at 0.961 for length of stay (LOS) and lowest at 0.705 for acuity. Inter-rater ICC showed good to excellent agreement for American Society of Anesthesiologists score, LOS, duration of surgery, and transfusion risk and moderate agreement for surgical acuity and personal protective equipment (PPE) use. Transfusion risk and duration of surgery were deemed least important, and surgeons were least confident in scoring PPE and transfusion risk. Based on findings, the novel Elective-Pediatric Orthopedic Surgical Timing (E-POST) score for prioritizing elective cases was developed, consisting of 5 factors: surgical acuity, global health status, LOS, duration of surgery, and PPE requirement.

CONCLUSIONS

The E-POST numeric total score or subscore may help objectively prioritize elective cases during a global crisis.

LEVEL OF EVIDENCE

Level V.

Blood loss in hip reconstructive surgery in children with cerebral palsy: when do I need to be prepared for blood transfusion?

The hip is the second most common joint involved in pediatric patients with cerebral palsy (CP). Hip reconstructive procedures are performed to improve function and comfort level. Blood loss can occur leading to blood transfusion in close to 1/3 of children with CP undergoing hip reconstruction. The purpose of this study was to report the rate and risk factors for blood transfusion after hip reconstruction in a large cohort of children with CP. We conducted a retrospective chart review of pediatric patients at our tertiary referral children's hospital who underwent reconstructive hip osteotomy over an 8-year period. Binary logistic regression was employed to compare and model differences in transfusion between age greater than 4 or 6 years and the number of osteotomies. A total of 180 patients met our inclusion criteria. Thirty-seven patients (20.6%) received blood transfusion. Incidence of transfusion increased as number of osteotomies increased from 1 to 4 (3.7%, 7.3%, 34.0%, 58.3%, respectively). We did not find a significant effect of age greater than 4 or 6 years on the rate of blood transfusion (P = 0.676 and P = 0.323, respectively). The number of osteotomies was a significant factor in the rate of blood transfusion in both models (P < 0.001). Number of osteotomies and not age was a significant risk factor in the rate of blood transfusion. This data can help the orthopedic surgeons in preoperative planning for the possibility of blood transfusion in these patients.

No Difference in the Incidence of Complications in Pediatric Patients with Moderate Anemia 30 Days after Pediatric Hip Surgery with and without Blood Transfusion

This study investigated the association between postoperative blood transfusion and the incidence of postoperative complications 30 days after pediatric hip surgery as well as factors significantly associated with 30-day postoperative complications. Patients were divided into two groups: those with postoperative complications and those with no complications. Postoperative hematocrit (Hct) was categorized as <25%, 25–30%, and >30%. Comparison was made between all postoperative complications at the 30-day follow-up that were influenced by anemia in patients who received transfusion and those who did not. A multivariate logistic regression model was used to identify factors independently associated with postoperative complications. The overall 30-day postoperative complication rate for all patients was 17% (24/138). No significant difference between the transfusion and the non-transfusion patients was found. Preoperative hematocrit (Hct) was significantly lower in the complications group (p = 0.030), and both length of stay and 30-day readmission were significantly higher in patients with complications (p = 0.011 and p < 0.001, respectively). Multivariate analysis revealed female gender (OR: 3.50, 95% CI: 1.18–10.36; p = 0.026) and length of hospital stay (OR: 1.23, 95% CI: 1.08–1.41; p = 0.004) to be factors independently associated with 30-day postoperative complications. However, no statistically significant difference in the incidence of complications at 30 days following pediatric hip dysplasia surgery was found between patients who received blood transfusion to maintain a Hct level ≥25% and those not receiving transfusion.

Blood Loss and Related Laboratory Changes after Single-Event Multilevel Surgery and Hip Reconstructive Surgery in Patients with Cerebral Palsy

Backgroud

Single-event multilevel surgery (SEMLS) and hip reconstructive surgery (HRS) often cause intraoperative bleeding, consequently increasing the probability of transfusion and postoperative laboratory changes. Therefore, it is important to assess risk factors to predict the amount of blood loss. This study aimed to evaluate blood loss, its influencing factors, and the related laboratory changes during SEMLS and HRS in patients with cerebral palsy (CP).

Methods

We retrospectively examined consecutive CP patients who underwent SEMLS and HRS. Surrogate markers of blood loss, including preoperative and postoperative hemoglobin (Hb), hematocrit, and changes in Hb concentration, were assessed. Albumin, aspartate aminotransferase (AST), alanine aminotransferase (ALT), and creatine levels were also analyzed for related laboratory changes. Risk factors were analyzed using multiple regression and logistic regression models.

Results

The overall cohort comprised 1,188 patients. Of them, 1,007 and 181 underwent SEMLS and HRS, respectively. Furthermore, 72 of 181 patients underwent a concomitant Dega osteotomy. The regression model showed that low preoperative Hb concentration (p < 0.001), high albumin level (p = 0.007), low body mass index (BMI) (p = 0.002), and bilateral HRS (p < 0.001) were significant risk factors of postoperative anemia. Valproate medication was associated with Hb drop, and the risk factors for Hb level < 8 g/dL on postoperative day 2 were bilateral HRS and Dega osteotomy in the HRS subgroup. In total, 21.6% had elevated AST levels on postoperative day 2, and bilateral HRS (p < 0.001), Gross Motor Function Classification System (GMFCS) level V (p = 0.041), Dega osteotomy (p < 0.001), and high preoperative AST level (p < 0.001) increased the risk of AST elevation.

Conclusions

We have summarized the estimated blood loss and related laboratory changes after SEMLS and HRS in patients with CP and identified the risk factors. Clinical guidelines should be accordingly developed to include assessment of these risk factors and their impact in the outcomes of CP patients undergoing SEMLS and HRS.

Tranexamic acid reduces blood loss in paediatric proximal femoral and/or pelvic osteotomies

PURPOSE

Proximal femoral and/or pelvic osteotomies (PFPO) are associated with significant blood loss, which can be harmful, especially in paediatric patients. Therefore, considering methods to reduce blood loss is important. The purpose of this study was to examine the efficacy of tranexamic acid (TXA) in reducing intraoperative estimated blood loss (EBL) in paediatric patients undergoing a PFPO.

METHODS

Paediatric patients who had a PFPO between 2014 and 2019 were retrospectively reviewed. Outcome measures included patient demographics, TXA use (none, preoperative and/or intraoperative bolus, pump), EBL, transfusion rate and thromboembolic complications. Univariate and multivariate analyses were performed to assess associations between investigated outcome measures and EBL.

RESULTS

A total of 340 PFPO (263 patients) were included. Mean age at surgery was 8.0 years (sd 4.3). In all, 269 patients received no TXA, 20 had a preoperative bolus, 43 had an intraoperative bolus and eight patients had other TXA regimes (preoperative and intraoperative bolus or pump). Overall, mean blood loss was 211 ml (sd 163). Multivariate analysis showed significant associations between higher EBL and higher age at surgery, male sex, higher body mass index and longer procedure time. There was a significant association between lower EBL and a preoperative TXA bolus: 66 ml (33%) less EBL compared with patients without TXA (95% confidence interval -129 to -4; p = 0.04). No thromboembolic complications were reported in any of the studied patients.

CONCLUSION

Preoperative TXA administration is associated with a decreased EBL in PFPO. No thromboembolic events were reported. Administering TXA preoperatively appears to be effective in paediatric patients undergoing a PFPO.

LEVEL OF EVIDENCE

Level III - retrospective comparative study.

Hospital resource use after hip reconstruction surgery in children with neurological complex chronic conditions

AIM

To assess how co-occurring conditions influence recovery after hip reconstruction surgery in children with neurological complex chronic conditions (CCCs).

METHOD

This was a retrospective analysis of 4058 children age 4 years or older with neurological CCCs who underwent hip reconstructive surgery between 1st January 2015 and 31st December 2018 in 49 children's hospitals. The presence of co-occurring chronic conditions was assessed using the Agency for Healthcare Research Chronic Condition Indicator system. Multivariable, hierarchical regression was used to assess the relationship between co-existing conditions and postoperative hospital length of stay (LOS), cost, and 30-day readmission rate.

RESULTS

The most common co-occurring conditions were digestive (60.1%) and respiratory (37.9%). As the number of co-existing conditions increased from one to four or more, median LOS increased 67% (3d [interquartile range {IQR} 2-4d] to 5d [IQR 3-8d]); median hospital cost increased 41% ($20 248 [IQR $14 921-$27 842] to $28 692 [IQR $19 236-$45 887]); and readmission rates increased 250% (5.5-13.9%), p<0.001 for all. Of all specific co-existing chronic conditions, malnutrition was associated with the greatest increase in postoperative hospital resource use.

INTERPRETATION

Co-occurring conditions, and malnutrition in particular, are a significant risk factor for prolonged, in-hospital recovery after hip reconstruction surgery in children with a neurological CCC. Further investigation is necessary to assess how improved preoperative optimization of multiple co-occurring conditions may improve postoperative outcomes and resource utilization.

WHAT THIS PAPER ADDS

Children with neurological complex chronic conditions (CCCs) often develop hip disorders which require hip reconstruction surgery. Co-occurring conditions are common in children with neuromuscular CCCs. Having four or more chronic conditions was associated with a longer length of stay, increased costs, and higher odds of readmission. Malnutrition was a significant risk factor for prolonged hospitalization after hip reconstruction surgery.

Blood transfusion following major orthopaedic surgery in cerebral palsy: a retrospective analysis

BACKGROUND

Progressive musculoskeletal pathology is ubiquitous among children with cerebral palsy (CP). Corrective surgery places them at risk of major blood loss and red blood cell (RBC) transfusion. Significant variability exists in uptake of perioperative patient blood management (PBM) strategies. This study aimed to examine factors contributing to RBC transfusion and assist in future development of care pathways.

METHODS

A retrospective review at a tertiary paediatric hospital was undertaken to identify patients with CP undergoing either primary spinal fusion or single event, multilevel surgery (SEMLS) between 2010 and 2015. Solely soft tissue procedures were excluded. Data collected included demographics, Gross Motor Function Classification System level, surgical details, perioperative PBM and transfusion rates. Univariable analysis was performed to assess contributing factors to RBC transfusion.

RESULTS

A total of 36 spinal fusion and 98 SEMLS patients were included. Preoperatively, 12% were anaemic, but only 19% had a ferritin checked. Overall, 49 patients (37%) received RBC transfusions. Intraoperative usage of tranexamic acid and cell salvage was 89% and 81%, respectively, for the spine cohort, and 22% and 3% for the SEMLS cohort. Successively higher Gross Motor Function Classification System levels, sodium valproate usage, longer surgical times, spinal fusion, pelvis instrumentation and more osteotomies were associated with RBC transfusion.

CONCLUSION

More than one-third of CP patients who underwent major orthopaedic surgery received RBC transfusion. As expected, the more severely affected patients undergoing longer procedures were at highest risk. Significant improvements can be made in PBM to help optimize patients for surgery and minimize the need for transfusion.

The Use of Tranexamic Acid (TXA) in Neuromuscular Hip Reconstruction: Can We Alter the Need for Blood Transfusion?

BACKGROUND

Children with neuromuscular complex chronic conditions (NMCCC) frequently undergo hip reconstruction surgery requiring blood transfusion. The purpose of this study is to examine the efficacy of tranexamic acid (TXA) to reduce blood loss and transfusion requirement in NMCCC children undergoing hip reconstruction surgery.

METHODS

Children with NMCCC undergoing hip reconstruction surgery between 2013 and 2018 were identified. Two cohorts were identified: those who received TXA and those who did not. Patient and surgical characteristics between cohorts were used for propensity matching. Patients were matched on the basis of comorbid factors, bilateral involvement, pelvic osteotomy, open reduction, and surgeon. Comparative outcomes between cohorts were analyzed for intraoperative and postoperative blood loss and transfusion requirements and length of hospital stay (LOS).

RESULTS

A total of 166 patients underwent hip surgery at an average of 9.6 years (SD, 4.0). Propensity matching utilized 72% of the cohort including 47 TXA and 72 non-TXA subjects. There were no differences in patient or surgical characteristics across matched groups. Fifteen (15/47, 32%) TXA subjects required a postoperative blood transfusion compared with the 47% (34/72) of non-TXA subjects who required a transfusion and intraoperative transfusion rates were similar between the 2 groups. There was no significant difference in complication rate (TXA, 79%; non-TXA, 86%), reported estimated blood loss (median=200 mLfor both) or LOS (median=6 d for both). Hematocrit levels were slightly higher in TXA subjects intraoperatively (P=0.047), at the end of surgery (P=0.04), and for the overall lowest perioperative level (P=0.04). The overall percent loss of estimated blood volume was less for those who were given TXA compared with those who were not (P=0.001).

CONCLUSIONS

The use of TXA during hip reconstruction surgery in NMCCC children significantly reduced the percent loss of estimated blood volume and postoperative transfusion rate. Further prospective multicenter studies are needed to verify the positive effects and safety of TXA in the setting of hip reconstruction surgery in NMCCC children.

LEVEL OF EVIDENCE

Level III-retrospective comparative study.

Thirty-Day Outcomes following Pediatric Bone and Soft Tissue Sarcoma Surgery: A NSQIP Pediatrics Analysis

BACKGROUND

Pediatric bone and soft tissue sarcomas are rare; therefore, national registries are essential tools for orthopedic oncology research. Past studies provide excellent data on long-term prognosis and survival trends but fail to examine treatment-specific morbidity. The aim of this study is to use a national registry to describe patient demographics, comorbidities, and adverse events in the first thirty days following surgical management of pediatric bone and soft tissue sarcomas.

METHODS

A retrospective review of patients in the American College of Surgeons National Surgical Quality Improvement Program-Pediatrics database (NSQIP-P) was performed. The cohort was partitioned by tumor origin (bone versus soft tissue) and tumor location (axial versus appendicular).

RESULTS

One-hundred ninety-two patients were identified. Bone sarcomas were more common (71.9%) and predominately appendicular (62.3%), while soft tissue sarcomas were predominately axial (77.8%). The overall complication rate was 8.9%. The most frequent etiologies were wound dehiscence (3.6%) and infectious complications such as surgical site infections (2.6%), pneumonia (1.6%), urinary tract infections (1.6%), and C. diff colitis (1.0%). Twenty-four percent of patients experienced bleeding requiring transfusion. The unplanned readmission rate was 12.5% (3.6% related to principle procedure), and the unplanned reoperation rate was 4.7% (4.2% related to principle procedure). The mortality rate was 1.0%. Neoadjuvant chemotherapy was associated with higher rates of wound dehiscence and infectious complications. There were no differences in adverse events with respect to tumor origin or location.

CONCLUSION

Approximately 1 in 11 pediatric patients will experience a complication in the first thirty days following surgery. However, perioperative mortality remains low. This study represents the first comprehensive review of pediatric bone and soft tissue sarcoma surgery in the NSQIP-P database. As the case volume of NSQIP-P continues to grow, NSQIP-P has the potential to become a powerful tool for pediatric orthopedic oncology research.

Efficacy and Safety of Tranexamic Acid in Reducing Blood Loss of Lower Extremity Osteotomy in Peri-acetabulum and High Tibia: A Systematic Review and Meta-analysis

Objective

To assess the efficacy of tranexamic acid (TXA) in reducing total blood loss and transfusion, and the risk of thromboembolic events in patients undergoing periacetabular osteotomy (PAO) and high tibial osteotomy (HTO).

Methods

A systematic literature search was performed using PubMed, the Cochrane Central Register of Controlled Trials (CENTRAL), Embase (Ovid), Medline (Ovid), and Web of Science. ClinicalTrials.gov, American Academy of Orthopaedic Surgeons (AAOS), and Orthopaedic Trauma Association (OTA) conference proceedings were also searched to gain more eligible studies. The primary outcome measure was total blood loss and the blood transfusion rate of the TXA group versus control. The meta‐analysis was conducted using the RevMan 5.3 and Stata 14.0 software.

Results

A total of six studies were included involving 665 patients. Three studies were PAO, and the other three were HTO. The total blood loss in PAO (WMD, −330.49; 95% CI, −390.16 to −270.83; P < 0.001) and HTO (WMD, −252.50; 95% CI, −356.81 to −148.18; P < 0.001) and hemoglobin decline (WMD, −0.74; 95% CI, −1.09 to −0.38; P < 0.001) were significantly less in the TXA group than in the control group. TXA could reduce transfusion rates in PAO (RR, 0.26; 95% CI, 0.09 to 0.75; P = 0.01) but had no effect on HTO (RR, 0.20; 95% CI, 0.01 to 4.10; P = 0.30). The wound complications (RR, 0.62; 95% CI, 0.13 to 2.94; P = 0.54) had no significant difference between TXA and control groups.

Conclusions

This meta‐analysis demonstrated that TXA reduces total blood loss and hemoglobin decline in patients undergoing PAO and is safe, but it has little benefit in regard to reducing transfusion rates or wound complications in HTO, so TXA might be unwarranted for routine use for HTO.

Efficacy of antifibrinolytics in pediatric orthopedic surgery: a systematic review and meta-analysis

Antifibrinolytics (AFs) stabilize blood clot formation and reduce bleeding. The purpose of this systematic review and meta-analysis was to determine the impact of AF use on intraoperative blood loss and the need for blood transfusion in pediatric orthopedic surgery. A systematic review was performed using Medline and Embase to identify studies that utilized AFs during pediatric orthopedic surgery. The primary outcome measure was intraoperative blood loss in ml. Secondary outcomes included blood transfusion and thromboembolic events. Pooled estimates were derived from a random-effects model. Heterogeneity was assessed using the Cochrane Q and I statistic. Meta-regression assessed if age or study quality modified the effect of AFs on blood loss. Publication bias was assessed using a funnel plot, Egger regression analysis, and the Kendall τ-test. Twenty studies, with a total of 1356 patients, were included. The mean difference in intraoperative blood loss was 653 ml [95% confidence interval (CI): 464-842 ml, P < 0.001]. Similarly, the mean difference in percent of blood volume lost was 22% less in patients treated with AFs compared with controls (95% CI: 12-32, P < 0.001). Patients treated with AFs had a lower odds of transfusion compared to controls (OR: 0.324; 95% CI: 0.105-0.997, P = 0.049). The use of AF in pediatric orthopedic surgery results in decreased intraoperative blood loss and a lower risk of blood transfusion. The majority of studies included involve spine surgery; the benefits of AFs in extremity surgery in the pediatric population have yet to be delineated. Level of Evidence: Level II.

Intraoperative cell salvage use reduces the rate of perioperative allogenic blood transfusion in patients undergoing periacetabular osteotomy

Blood loss during periacetabular osteotomy (PAO) is variable, with losses ranging from 100 to 3900 ml in published series. Perioperative allogenic blood transfusion is frequently utilized although is associated with significant risk of morbidity. Cell salvage (CS) is a common blood conservation tool; however, evidence supporting its use with PAO is lacking. Our aim was to assess whether CS affects perioperative allogenic blood transfusion rate in patients undergoing PAO. The clinical records of 58 consecutive PAOs in 54 patients (median age 24.7 years, interquartile range 17.8–29.4 years) performed by a single surgeon between 1 January 2016 and 30 April 2018 were reviewed. Autologous blood pre-donation and surgical drains were not used. Due to variable technician availability, CS was intermittently used during the study period. PAOs were allocated into a CS group or no cell salvage group (NCS group), according to whether an intraoperative CS system was used. There was no significant difference in patient age, gender, body mass index, dysplasia severity, regional anesthetic technique, tranexamic acid administration, surgical duration or estimated blood loss (all P > 0.05) between the two groups. The CS group had a lower preoperative hemoglobin compared to the NCS group (median, 13.4 g/dl versus 14.4 g/dl, P = 0.006). The incidence of allogenic blood transfusion was significantly lower in the CS group compared to the NCS group (2.5% versus 33.3% patients transfused, P = 0.003). Multivariate modeling showed CS use to be protective against allogenic blood transfusion (P = 0.003), with an associated 80-fold reduction in the odds of transfusion (odds ratio, 0.01; 95th% CI, 0–0.57). To our knowledge, this is the first study to assess the effect of CS use on allogenic transfusion rate in patients undergoing PAO. Our results demonstrate CS to be a mandatory component of blood conservation for all patients undergoing PAO.

Development of a prediction model for allogenic blood transfusion in children undergoing surgery for developmental dysplasia of the hip

BACKGROUND

Blood transfusion is a common practice, but it is not without cost and risk. A model that predicts the risk of blood transfusion could guide informed preoperative blood ordering and use of blood loss preventive measures.

OBJECTIVE

This study aimed to develop a prediction model of blood transfusion in children with developmental dysplasia of the hip (DDH) undergoing surgery.

METHODS

A retrospective cohort of DDH patients from 2008 to 2017. The included patients were between 1 to 9 years old, underwent anterior open reduction and/or acetabular osteotomy with and without femoral shortening. The unit of analysis was undergoing such an operation. The outcome was allogenic blood transfusion. Potential predictors were age, sex, body mass index (BMI), international hip dysplasia institute grade, type of surgery, intervention bilaterally during the same operative session, primary versus reoperation surgery, the addition of regional anaesthesia, preoperative haemoglobin and hematocrit.

RESULTS

A total of 524 patients who met the inclusion criteria underwent 721 operative sessions. The median age (interquartile range) at operation was 23 (20-33) months. The blood transfusion rate was 11.8%. Independent predictors were lower preoperative haemoglobin, reduced BMI, simultaneous bilateral surgery and the extent of surgical treatment.

CONCLUSIONS

The developed prognostic model allows prediction for blood transfusion in DDH patients undergoing surgery.

Relationship between perioperative blood transfusion and surgical site infections in pediatric general and thoracic surgical patients

BACKGROUND

Recently, perioperative transfusions were demonstrated to be associated with higher rate of surgical site infections (SSIs) in neonates. We sought to examine whether a similar relationship exists between perioperative blood transfusions and SSI among non-neonatal pediatric general surgical patients.

METHODS

We conducted an IRB-approved retrospective study reviewing non-neonatal patients (age greater than 28days and less than 18years) who underwent a general or thoracic surgical procedure in 2012, 2013, 2014, in the American College of Surgeons National Safety and Quality Improvement Project-Pediatric (ACS-NSQIP-P) Participant User Files. We used Chi-square analyses to perform a bivariate analysis comparing proportions of SSI's between patients who received blood transfusion to those who did not. Multiple logistic regression analyses compared the odds of SSIs in transfused versus nontransfused patients controlling for organ failure, steroid use, nutritional status, current infection, American Society of Anesthesiologists (ASA) Physical Status classification, and wound classification.

RESULTS

There were 55,133 patients with 1779 patients who received blood transfusion (≥25ml/kg body weight) during or within 72h of surgery. Bivariate analysis showed at least twice the rate of infection in transfused patients compared to nontransfused patients (p<0.01): superficial SSI 3.5% vs 1.5%; deep SSI 0.8% vs 0.2%, organ space SSI 3.8% vs 1.6%; deep dehiscence 2% vs 0.3%. Total wound infections and dehiscence for transfused patients were 10.5% vs 3.8% in nontransfused patients (p<0.01). Multiple regression analysis showed that nutritional issue, current infection, and wounds not classified as "clean" have statistically significant correlation with SSI. Although there was significant interaction between ASA and transfusion (p<0.0001), we found statistically significant associations between transfusions and SSI for ASA class 1-2 (OR=5.51, 95% CI 3.47-7.52), ASA class 3 (OR=2.06, 95% CI 1.63-2.61), and ASA class 4-5 (OR=1.67, 95% CI 1.15-2.42).

CONCLUSION

In non-newborn pediatric general and thoracic surgery patients, transfusions were associated with higher risk of SSI or wound dehiscence. Although there was a significant interaction between ASA and transfusion, OR for SSI was stronger for lower ASA classes.

TYPE OF STUDY

Retrospective Review.

LEVEL OF EVIDENCE

II.

Incidence of Acute Complications Following Surgery for Syndactyly and Polydactyly: An Analysis of the National Surgical Quality Improvement Program Database from 2012 to 2014

PURPOSE

Congenital hand differences are infrequent phenomena, and their treatment represents a relatively small fraction of cases performed by hand surgeons. Little is known about the incidence of wound complications and acute postoperative problems given the relative rarity of these procedures. This study sought to characterize the incidence of complications within 30 days of surgery for congenital hand differences.

METHODS

The National Surgical Quality Improvement Program (NSQIP) contains prospective data regarding 30-day morbidity from 64 pediatric centers across the United States. Data from all available years (2012-2014) were queried for Current Procedural Terminology (CPT) codes pertinent to the treatment of congenital hand differences. Bivariate statistics, Fisher exact tests and Poisson 95% confidence intervals (95% CI) were used to assess the incidence of complications and examine risk factors for these outcomes.

RESULTS

We identified a total of 1,656 congenital hand cases that represented 4 different CPT codes, including surgery for simple syndactyly, complex syndactyly, and polydactyly. The overall incidence of complications was 2.2% (95% CI, 1.6%-3.1%; n = 37) with the most common complication being superficial surgical site infection (1.7%; 95% CI, 1.1%-2.4%) followed by related readmission (0.3%; 95% CI, 0.1%-0.7%). There was a higher incidence of complications observed in patients undergoing complex syndactyly repair (5.2% for complex syndactyly repair vs 2.3% for all others).

CONCLUSIONS

The rate of acute complications following procedures to correct syndactyly and polydactyly is low, the most common of which is superficial surgical site infection. The incidence of acute complications may be helpful in counseling patients and families. We suggest that further research must prioritize collecting data on long-term functional outcomes.

TYPE OF STUDY/LEVEL OF EVIDENCE

Therapeutic II.