Genetic Research and Utilization Reference of Saccharum spontaneum L.

[Objectives]The genetic characteristics of wild germplasm resources of Saccharum spontaneum L.were further investigated to provide a scientific theoretical basis for the improved hybridization of sugarcane varieties.[Methods]The first flowering date data of 112 wild resources were statistically analyzed by broad heritability for 3 consecutive years,and pollen quantity and yield were investigated to provide reference for hybridization.[Results]The broad heritability of the first flowering date of S.spontaneum was 0.079.The differences in the first flowering date between the S.spontaneum resources were in the range of 4-49 d,with an average of 13.65 d.The inter-annual changes within 20 d accounted for 90 %,and only 4.5% exceeded 30 d.The first flowering dates of some S.spontaneum resources were obviously postponed after being treated.[Conclusions]In the hybridization season,the hybridization plan must be adjusted according to the actual situation of the flowering period to make full use of it.

Effects of dexmedetomidine on the expression of inflammatory factors in children with congenital heart disease undergoing intraoperative cardiopulmonary bypass:A randomized controlled trial

Importance:Dexmedetomidine inhibits the inflammatory response associated with cardiopulmonary bypass(CPB)and protects neural function.However,the mechanism of dexmedetomidine’s anti-inflammatory pathway is unclear.Objective:To investigate the effect of dexmedetomidine on the cognitive level and expression of inflammatory factors in children with congenital heart disease undergoing intraoperative CPB.Methods:Ninety children with congenital heart disease were recruited and randomly divided into 3 groups of 30 children in each.In Group 1,a 1.0μg·kg-1·h-1 intravenous bolus of dexmedetomidine was administered 10 minutes after induction of anesthesia,followed by a 0.2μg·kg-1·h-1 infusion until the surgical incision.In Group 2,a 0.5μg/kg intravenous bolus of dexmedetomidine was administered 10 minutes after induction of anesthesia,followed by a 0.1μg·kg-1·h-1 infusion until the surgical incision.The control group was given physiological saline using the same method as in Groups 1 and 2.The serum levels of nuclear factor-kappa B(NF-κB),S-100βprotein,neuron-specific enolase(NSE),tumor necrosis factor-α(TNF-α),and interleukin-6(IL-6)were measured before the surgery(T1),at the end of CPB(T2),2 hours after CPB(T3),6 hours after CPB(T4),and 24 hours after CPB(T5).The Wechsler Intelligence Scale for children(WISC)was measured before the operation and at 3,6,and 12 months after the operation to evaluate the neurodevelopmental state of the children.Results:The levels of the NF-κB,S-100βprotein,NSE,TNF-α,IL-6 were significantly higher at T2,T3,or T4 than before the surgery(T1)in the control group or the dexmedetomidine groups.However,the increases of NF-κB,TNF-α,IL-6,S-100βand NSE levels were significantly smaller in the dexmedetomidine groups than those in the control group(P<0.017).The WISC scores were similar among the three groups before or after the operation.Interpretation:The increases in NF-κB,TNF-α,and IL-6 levels indicated aggravation of the inflammatory reaction and the increase S-100βprotein and NSE levels indicated that the nervous system was damaged.Administration of dexmedetomidine to children with congenital heart disease undergoing intraoperative CPB can inhibit the inflammatory response and may ameliorate the neurodevelopmental damage caused by CPB.

End-tidal carbon dioxide monitoring revealed severe complications during cardiothoracic surgery

Introduction:With the continuous progress being made in medicine and surgery,increasingly more advanced technology and monitoring equipment are being used in anesthesia,end-tidal carbon dioxide(PETCO_(2))monitoring revealed serious complications of cardiothoracic surgery.Case presentation:A 3-year-old boy with a body weight of 15 kg presented with a>1-month history of a heart murmur.At the moment of arterial catheter ligation,the PETCO_(2) decreased from 37 to 15 mmHg,while the blood pressure,heart rate,and airway resistance did not change significantly.After re-separation of the ligation catheter,the surgeons carefully exposed the ductus and left pulmonary artery again and ligated the ductus arteriosus.Conclusion:This case suggests that PETCO_(2) monitoring reflects the circulatory status and pulmonary blood flow.

Anesthetic management of children with congenital insensitivity to pain with anhidrosis

Introduction:Congenital analgesia is a rare autosomal recessive hereditary disease.The primary damage of congenital analgesia is central structure damage of comprehensive pain perception.Case presentation:A 1-year-old Han Chinese boy was admitted to hospital because of a tongue bite.He had no response to noxious stimulation of the body surface and was diagnosed with congenital analgesia.A small dose of remifentanil was intravenously injected during anesthetic induction to reduce the stress response caused by endotracheal intubation.A certain depth of anesthesia should be guaranteed during anesthetic induction and surgery to alleviate the stress response induced by endotracheal intubation and the operation.Conclusion:Opioid analgesics are not required for general anesthesia in patient with congenital insensitivity to pain.With a heat dissipation barrier in patients with congenital insensitivity to pain with anhidrosis,body temperature,end-tidal carbon dioxide and bispectral index should be monitored.

Anesthesia with propofol-remifentanil combined with rocuronium for bronchial foreign body removal in children: Experience of 2886 cases

Importance: The appropriate anesthetic method can reduce the complications of children with tracheal foreign body and reduce the mortality rate of children. What kind of anesthetic method to choose has always been the focus of debate. Purpose: To evaluate the efficacy and safety of anesthesia with propofol-remifentanil combined with rocuronium for foreign body aspiration (FBA) removal with the positive-pressure ventilation technique. Methods: Medical records of patients who underwent bronchoscopy for evaluation of FBA in our unit from January 2015 to January 2018 were retrospectively reviewed. Demographic data (age and sex), nature of foreign body and location, complications, length of hospital stay and outcome were analyzed. Results: A total of 2886 children were included in this study. The median age was 24 months (8 months to 10 years). FBA was detected and removed in 95.6％ of patients. The average operation time was 17 ± 5 min and average length of hospital stay was 2 days. Observed peri-interventional complications included desaturation (n = 66), laryngospasm (n = 19), laryngeal or subglottic edema (n = 15), irritating cough (n = 3), body movement (n = 76) and pneumonia (n = 206). No deaths occurred during hospitalization or follow-up in this series. Interpretation: Anesthesia with propofol-remifentanil combined with rocuronium under positive-pressure ventilation is an effective and safe technique during FBA removal in children.