Influence of blood loss on cerebral oxygen saturation in paediatric patients undergoing surgery for scoliosis correction: A retrospective observational study.

AIM: Surgery for congenital scoliosis correction in children is often associated with considerable blood loss. Decrease in regional oxygen saturation (rScO2) can reflect insufficient cerebral perfusion and predict neurological complications. This retrospective observational study explored the relationship between blood loss during this surgery and a decrease in rScO2 in children. METHODS: The following clinical data of children aged 3-14 years who underwent elective posterior scoliosis correction between March 2019 and July 2021 were collected: age, sex, height, weight, baseline rScO2, basal mean invasive arterial pressure (MAP), preoperative Cobb angle, number of surgical segments, preoperative and postoperative haemoglobin level, percentage of lowest rScO2 below the baseline value that lasted 3 min or more during the operation (decline of rScO2 from baseline, D-rScO2%), intraoperative average invasive MAP, end-tidal carbon dioxide pressure, fluid infusion rate of crystalloids and colloids, operation time, and percentage of total blood loss/patient's blood volume (TBL/PBV). RESULTS: A total of 105 children were included in the study. Massive haemorrhage (TBL/PBV ≥50%) was reported in 53.3% of patients, who had significantly higher D-rScO2 (%) (t = -5.264, P < 0.001) than those who had non-massive haemorrhage (TBL/PBV <50%). Multiple regression analysis revealed that TBL/PBV (ß = 0.04, 95% CI: 0.018-0.062, P < 0.05) was significantly associated with D-rScO2%. CONCLUSIONS: Intraoperative massive blood loss in children significantly increased D-rScO2%. Monitoring should be improved, and timely blood supplementation should be performed to ensure maintenance of the blood and oxygen supply to vital organs, improve the safety of anaesthesia, and avoid neurological complications.

Co-treatment with Oral Duloxetine and Intraarticular Injection of Corticosteroid plus Hyaluronic Acid Reduces Pain in the Treatment of Knee Osteoarthritis.

BACKGROUND: Knee osteoarthritis (OA) is a common form of arthritis in elders which can lead to reduced daily activity and quality of life. It is important to administer a proper treatment with high efficacy and low side effects. In this study, we evaluated the efficacy of co-treatment with oral duloxetine and intraarticular (IA) injection of hyaluronic acid (HA) and corticosteroid (CS) in patients with knee OA. OBJECTIVES: This study aimed to test the hypothesis that an IA injection of CS+HA combined with duloxetine could achieve pain management superior to that of an IA injection of CS+HA alone in patients experiencing knee OA related pain. STUDY DESIGN: This study adopted a prospective, randomized, open-label blind endpoint study design. SETTING: The investigation was performed at Beijing Tiantan Hospital Affiliated with the Capital Medical University from October 2019 to December 2021. The study plan was approved by the Ethics Committee of Beijing Tiantan Hospital (KY 2019-086-02). METHODS: A total of 150 patients were randomly allocated to receive either duloxetine combined with an IA injection (n = 75) or a single IA injection alone (n = 75). All patients were followed for 24 weeks. The primary outcome was the change in the weekly 24 hours average mean pain scores, and the secondary outcomes included the proportion of patients with >= 30% or >= 50% pain reduction, Brief Pain Inventory (BPI) items, Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) scores, Patient Global Impression Improvement (PGI-I) ratings, hospital anxiety and depression scale (HADS) scores and adverse events (AEs).. RESULTS: Patients in the experimental group had significantly greater improvement in the change of weekly mean of the 24 hours average pain scores, BPI pain severity ratings (P < 0.001) and WOMAC scores (P < 0.001) at the study endpoint. A significantly greater percentage of patients in the experimental group rated PGI-I of <= 2 (P = 0.021) and >= 50% pain reduction (P = 0.029) at 24 weeks. There was no difference in the proportion of patients with <= 30% pain reduction, the HADS scores or frequency of AEs between the 2 groups. LIMITATIONS: The effectiveness and safety were examined only up to 24 weeks after treatment, and we did not perform a long-term follow-up as most previous studies have. Optimum dosage of duloxetine, as well as different molecular-weight HA, should be investigated in future studies. CONCLUSION: Patients receiving co-treatment with oral duloxetine and IA (HA+CS) injections experienced considerable improvement in pain and knee function compared to those who received an IA injection alone.

Short-term outcomes of an enhanced recovery after surgery pathway for children with congenital scoliosis undergoing posterior spinal fusion: a case-control study of 70 patients.

Increasing evidence demonstrates the advantages of an enhanced recovery after surgery (ERAS) protocol; however, few studies have evaluated ERAS in pediatric patients. This study aimed to evaluate the effect of ERAS in pediatric patients with congenital scoliosis. Seventy pediatric patients with congenital scoliosis underwent posterior hemivertebra resection and fusion with pedicle screws and were prospectively randomly assigned to the ERAS group (n = 35) and control group (n = 35). ERAS management comprised 15 elements including a shortened fasting time, optimized anesthesia protocol, and multimodal analgesia. The control group received traditional perioperative management. Clinical outcome was evaluated by hospital stay, surgery-related indicators, diet, pain scores, laboratory tests, and complications. The surgical outcome showed a similar correction rate in the ERAS group (84.0%) and control group (89.0%; P = 0.471). The mean fasting time was significantly shorter in the ERAS group than in the control group. Compared with the control group, the ERAS group had significantly shorter mean times to postoperative hospital stay, first anal exhaust and defecation, significantly lower mean pain scores in the first 2 days postoperatively (P < 0.05), and a significantly lower mean interleukin-6 concentration on postoperative day 1 (P < 0.001). The incidence of complications was similar in the ERAS group and control group (P > 0.05). The ERAS protocol is effective and safe for pediatric patients with congenital spinal deformity and may significantly improve the treatment efficacy compared with traditional perioperative management methods. Levels of Evidence: III.

Predictors of perioperative blood loss in primary posterior hemivertebra resection for pediatric patients with congenital scoliosis.

Several studies have elucidated the risk factors of intraoperative bleeding. However, the total blood loss (visible and hidden loss) and related risk factors were seldom reported. In this study, we aimed to identify predictors of massive blood loss in posterior hemivertebra resection for pediatric patients. Clinical records were retrospectively reviewed for 108 pediatric patients who underwent primary posterior hemivertebra resection and spinal fusion for congenital scoliosis from June 2017 to June 2019. Intraoperative blood loss was recorded and hidden blood loss was calculated by deducting the intraoperative loss from the total blood loss calculated using specific formula. Perioperative information was collected for multivariable linear regression analysis to determine the independent risk factors of the blood loss. The mean total blood loss was 575.0 ± 318.0 ml during the perioperative period, accounting for 42.1% of the estimated blood volume. The intraoperative and hidden loss were 337.6 ± 179.5 ml and 237.4 ± 204.8 ml, respectively, accounting for 58.7 and 41.3% of the total loss. Multivariable linear regression indicated that age, preoperative Cobb angle, operative time, and number of fused levels were independent risk factors of the total blood loss. Patients with operative time ≥145 minutes, fused levels ≥4, and preoperative Cobb angle ≥40° have an increased risk of massive blood loss. The perioperative blood loss of surgery for congenital scoliosis was considerable, with a high percentage of hidden blood loss. Patients with severe deformity, more fused levels, and longer operative time had higher risk of massive blood loss.

Internal fixation versus hemiarthroplasty for displaced femoral neck fractures in the elderly: A cost-effectiveness analysis.

BACKGROUND: There is little information on the cost and outcome of different treatments for femoral neck fractures. This study aimed to evaluate the cost-effectiveness of internal fixation compared with hemiarthroplasty (HA) for elderly patients with displaced femoral neck fractures. MATERIALS AND METHODS: A total of 121 patients ≥ 65 years old were divided into internal fixation (n = 58) or HA group (n = 63). Clinical outcome was evaluated by the EuroQol 5 dimensions (EQ-5D) score at 3, 12, and 24 months. The total costs including medical and non-medical expense were collected through hospitalisation information, cost diaries, and telephone interviews. A cost-utility analysis of the total costs in combination with quality-adjusted life years (QALYs) calculated by EQ-5D and survival time was conducted. Results were expressed in incremental cost-effectiveness ratio (ICER). RESULTS: The mean EQ-5D index score in the HA group were higher at the early follow-up (p<0.05). At 24 months there were no differences in EQ-5D between the 2 treatment groups (p>0.05). Over the 2-year period, patients treated with HA gained 0.09-0.10 more QALYs than those treated with internal fixation, while the mean total costs for internal fixation (CNY 55,676) were significantly lower than for HA (CNY 80,297) (P<0.001). ICER indicated that internal fixation may be more cost-effective than HA. CONCLUSION: HA is associated with better outcome than internal fixation in the treatment of displaced femoral neck fractures in elderly patients. However, internal fixation may be more cost-effective because of less total cost.

Effect of pulsed radiofrequency on rat sciatic nerve chronic constriction injury: a preliminary study.

BACKGROUND: Pulsed radiofrequency (PRF) application to the dorsal root ganglia can reduce neuropathic pain (NP) in animal models, but the effect of PRF on damaged peripheral nerves has not been examined. We investigated the effect of PRF to the rat sciatic nerve (SN) on pain-related behavior and SN ultrastructure following chronic constriction injury (CCI). METHODS: The analgesic effect was measured by hindpaw mechanical withdrawal threshold (MWT) and thermal withdrawal latency (TWL). Twenty rats with NP induced by ligating the common SN were then randomly divided into a PRF treatment group and a sham group. The contralateral SN served as a control. The MWT and TWL were determined again 2, 4, 6, 8, 10, 12, and 14 days after the PRF or sham treatment. On day 14, ipsilateral and contralateral common SNs were excised and examined by electron microscopy. RESULTS: Ipsilateral MWT was significantly reduced and TWL significantly shorter compared to the contralateral side 14 days after CCI (both P = 0.000). In the PRF group, MWT was significantly higher and TWL significantly longer 14 days after the PRF treatment compared to before PRF treatment (both P = 0.000), while no such difference was observed in the sham group (P > 0.05). Electron microscopy revealed extensive demyelination and collagen fiber formation in the ipsilateral SN of sham-treated rats but sparse demyelination and some nerve fiber regrowth in the PRF treatment group. CONCLUSIONS: Hyperalgesia is relieved, and ultrastructural damage ameliorated after direct PRF treatment to the SN in the CCI rat model of NP.

Radial shock wave therapy in the treatment of chronic constriction injury model in rats: a preliminary study.

BACKGROUND: Pain physicians pay close attention to neuropathic pain (NP), since there is currently no ideal treatment. Radial shock wave therapy (RSWT) is a noninvasive treatment to chronic pain of soft tissue disorders. So far, there is no information on the use of RSWT for the treatment of NP. Therefore we observe the effects of RSWT on a NP model induced by chronic constriction injury (CCI) in rats. METHODS: Four different energy densities (1.0, 1.5, 2.0 and 2.5 bar) RSWT administered as a single session or repeated sessions in rats with NP induced by CCI of the sciatic nerve. The analgesic effect was assessed by measuring mechanical withdrawal threshold (MWT) and thermal withdrawal latency (TWL). The safety was assessed through calculating sciatic functional index (SFI). RESULTS: MWT and TWL increased after a single session of RSWT from day 1 to day 5 but returned to baseline levels by day 10. Following repeated sessions of RSWT, both the MWT and TWL were significantly higher than NP group (P < 0.01) for at least 4 weeks. In addition, no significant changes of SFI were observed in any groups after repeated sessions of RSWT and no increased pain or other side effects in any animals. CONCLUSIONS: A single session of RSWT is rapidly effective in the treatment of CCI, but the efficacy maintained in a short period. However, repeated sessions of RSWT have prolonged efficacy.