MCS+型血细胞分离机采集血小板冲红的原因分析

目的 :了解MCS +型血细胞分离机采集血小板冲红的原因。方法 :将血细胞分离机采集血小板出现冲红的献血者 2 0名作为冲红组 ,随机选择正常机采血小板的献血者 2 0名作为对照组 ,对两组献血者机采前手指末梢血的红细胞计数 (RBS)、血红蛋白 (Hb)、红细胞体积分数 (Hct)、红细胞平均体积 (MCV)、红细胞平均血红蛋白 (MCH)、红细胞平均血红蛋白浓度 (MCHC)和血浆总蛋白进行分析。结果 :冲红组多项血液参数 (包括Hb、Hct、MCV、MCH、MCHC)以及血浆总蛋白均明显低于对照组 ,差异有非常显著性 (P <0 .0 1) ;而两组的外周末梢血RBC计数比较差异无显著性 (P >0 .0 5 )。结论 :冲红现象与外周血的Hb、Hct、MCV、MCH、MCHC以及血浆总蛋白等参数的水平降低有关。     

不同采摘方式和施肥措施对茶鲜叶机械组成的影响

[目的]研究不同采摘方式和施肥措施对茶鲜叶机械组成的影响,从而了解茶园实行机采后茶青原料和品质的变化,为在贵州茶园推广机械化采摘奠定基础。[方法]在福鼎茶园设置3种施肥水平,分别采用3种不同的采摘方式,分析测定各采摘方式和施肥措施下茶鲜叶的机械组成变化。[结果]随着施肥量的增加,优质芽叶的百分比上升,3倍施肥比对照的优质芽叶数量百分比提高了55.45%;在同一施肥水平下,机采比手采后优质芽叶的百分比提高。[结论]在贵州福鼎茶园,夏秋季使用机械采摘,可以减少劳动力投入,而且充分利用了茶青原料,能提高产业效益。     

Application of therapeutic plasma exchange in dogs with immune-mediated thrombocytopenia

Therapeutic plasma exchange (TPE) is an emerging treatment for dogs with immune-mediated diseases, but reports for treatment of immune-mediated thrombocytopenia (IMT) are lacking. These case reports illustrate the application of centrifugal TPE in 4 dogs with IMT. All dogs presented with severe hemorrhage requiring ≥1 blood transfusions, were unresponsive to conventional treatment or both. Dogs were treated with 3 sequential centrifugal TPE sessions, totaling 4.0 to 4.9 total plasma volumes exchanged per dog. In 3 dogs, TPE was associated with improvement in clinical manifestations of bleeding and platelet count in combination with immunosuppressive drugs. One dog was euthanized after 3 treatments because of persistent severe thrombocytopenia and hemorrhage. Preliminary observations indicate that TPE is safe and may be a useful adjunct in the management of IMT that is severe or refractory to traditional treatment.     

Apheresis in three dogs weighing <14 kg

HistoryCaridianBCT apheresis machines require a ~285 mL priming volume (extracorporeal blood) that is withdrawn from the patient in ~10 minutes. Therefore, apheresis in dogs has generally been limited to dogs > ~20 kg to assure <20% of the blood volume is removed in the priming phase.Animals/physical examinationThree dogs weighing <14 kg (13.6, 10.5, and 9.9 kg) with lymphoma that underwent apheresis.ManagementThe dogs were premedicated for placement of apheresis catheters with hydromorphone (0.1 mg kg^?1) IM. Anesthesia was induced with propofol, to effect, intravenously and general anesthesia was maintained with isoflurane in oxygen. Following catheter placement, dogs were allowed to recover from isoflurane but were kept sedated with either a dexmedetomidine constant rate infusion (CRI) or a propofol CRI. Real time autologous blood priming was not performed in any of the dogs. Instead, priming solutions were composed of a combination of hetastarch, lactated Ringer's solution, and/or autologous blood that was harvested 4 days before the procedure. During apheresis, dogs received anticoagulant citrate‐dextrose, solution‐A (ACD‐A) to prevent clotting and 10% calcium gluconate as needed to maintain normal ionized calcium concentrations. Dogs were monitored for cardiovascular and cardiopulmonary stability, anemia and lactic acidosis.Follow‐upAll of the dogs had cardiovascular and cardiopulmonary values within clinically acceptable ranges. Immediately following apheresis all of the dogs were mildly to moderately anemic (PCV; 17–35%) although none of the dogs required a transfusion or had an increased lactate concentration.ConclusionsDogs as small as 9.9 kg can successfully undergo apheresis with a variety of priming solutions. Dexmedetomidine or propofol given as a CRI provides sufficient sedation for this procedure.     

Comparison of three mobilization protocols for peripheral blood stem cell apheresis with Spectra Optia continuous mononuclear cell protocol in healthy dogs

Peripheral blood stem cell (PBSC) transplantation following consolidation therapy is a feasible treatment option for canine haematological malignancies. In veterinary medicine, haematopoietic stem cells are generally mobilized into peripheral circulation using a granulocyte colony‐stimulating factor (G‐CSF). This pilot study aimed to evaluate the haematopoietic stem cell mobilization effect of three different regimens for PBSC apheresis with Spectra Optia continuous mononuclear cell (CMNC) protocol in healthy dogs. Stem cell mobilization was performed using high‐dose plerixafor (CXCR‐4 inhibitor) alone, a G‐CSF alone, or a combination of the low‐dose plerixafor and G‐CSF. Three dogs were assigned to each mobilization protocol. Regardless of the mobilization protocol, the total blood volume processed was uniformly set as 270 mL/kg and many PBSCs, defined as CD34+/CD45^dim cells, within the apheresis product were compared. Changes in complete blood count, PBSC counts, and blood chemistry analysis were monitored before, during, and after apheresis. All dogs tolerated the apheresis procedure using the Spectra Optia system with minimal adverse effects. The mean PBSC counts of the apheresis products for plerixafor, G‐CSF, and the combination groups were 1.3 ± 0.24, 4.2 ± 0.47, and 6.4 ± 0.9 × 10⁶ cells/kg, respectively. The apheresis procedure using Spectra Optia CMNC protocol in dogs is safe and feasible. Furthermore, PBSC mobilization with a combination of G‐CSF and plerixafor appeared more effective than either compound alone in mobilizing PBSC to the peripheral blood in dogs.