外科學(xué)總論英文名詞解釋.doc

isotonic dehydrationoccurs when the fluid lost is isotonic with serum, as in sweating, simple enteritis腸炎, nephrosis腎病. There are therefore no errors of electrolyte電解液 balance likely to result.The concentration of sodium is in the normal range.hypotonic dehydrationoccurs when there is loss of both sodium and fluid .The serum sodium level falls below 135mmol/L and the osmotic pressure of extracellular fluid is lower than normal.hypertonic dehydrationA condition caused by the excessive loss of water from the body，which there is less electrolyte loss than water.The serum sodium level is over 135mmol/L and the osmotic pressure of extracellular fluid is lower than normal.water intoxication/dilutional hyponatremiaan increase in the volume of free water in the body. Common causes are excessive ingestion of water, increased infusions of hypotonic IV solutions, or excess secretions of antidiuretic hormone(ADH). Clinical manifestations are abdominal cramps, nausea, vomiting, lethargy, and dizziness. It can potentially lead to convulsions抽搐 and coma.hypokalemiaan abnormally low serum potassium level(3.5mmol/L). Hypokalemia may occur in metabolic alkalosis, chronic diarrhea, Cushing syndrome, primary aldosteronism, and excessive use of cortisone, or ACTH.hyperkalemiaabnormally high potassium concentration in the blood(above 5.5mmol/L), most often due to defective renal excretion, as in kidney disease, severe and extensive burns, intestinal obstruction, diabetes mellitus, acute renal failure and hypoadrenocorticism.metabolic acidosisDecreased pH(below 7.35) and bicarbonate concentration of the body fluids caused either by the accumulation of excess acids stronger than carbonic acid or by abnormal losses of bicarbonate from the body.metabolic alkalosisAn increase in the alkalinity of body fluids due to an increase in alkali intake or a decrease in acid concentration, as from vomiting. pH is over 7.45.respiratory acidosisAcidosis that is caused by retention of carbon dioxide, due to inadequate pulmonary ventilation or hypoventilation, and that results in a decrease in blood pH unless compensated for by renal retention of bicarbonate.respiratory alkalosisan abnormal condition characterized by a high plasma pH(over 7.45) resulting from increased alveolar ventilation. The consequent acceleration of carbon dioxide excretion lowers the plasma level of carbonic acid, thus raising plasma pH. The hyperventilation may be caused by pulmonary and nonpulmonary problems. Some pulmonary causes are acute asthma, pulmonary vascular disease, and pneumonia. Some nonpulmonary causes are aspirin toxicity, anxiety, fever etc.acepsisthe exclusion of all microorganisms before they can enter an open surgical wound or contaminate a sterile field during surgerysterilizationthe process of destroying all microorganisms and their pathogenic products. It is accomplished by heat (wet steam or dry heat ) or by bactericidal chemical compounds.disinfectionThe process or act of destroying pathogenic microorganisms. However, certain bacterial spores may survive and germinate which could lead to contamination. blood transfusionthe administration of whole blood or a component, such as packed red cells, to replace blood lost through trauma, surgery, or disease,in order to supplement blood volume, improve circulatory function and oxygen-carrying ability, increase the plasma protein and enhance immunity and coagulation function.hematocrit HCTa measure of the packed cell volume of red cells, expressed as a percentage of the total blood volume. The normal range is between 43% and 49% in men and between 37% and 43% in women.tansfusion reactiona group of clinical signs due to antibody in the recipients blood reacting with the transfused red blood cells when blood for transfusion is incorrectly matched, or when the recipient has an adverse reaction to some element of the donor blood. SIRSan inflammatory state affecting the whole body, frequently a response of the immune system to infection, but not necessarily so. It is related to sepsis, a condition in which individuals both meet criteria for SIRS and have a known or highly suspected infection.Temperature 38oC Heart rate 90 beats/min Respiratory rate pCO2 20 breaths/min WBC count 12 x 109 or , or the presence of 0.10 immature neutrophils transfusion-related acute lung injury TRALIa syndrome seen in persons receiving transfusions, characterized by pulmonary edema, dyspnea, hypoxemia, hypotension, and fever; it is thought to be a reaction to antibodies or other components of the donor blood product. Patients need oxygen support, and in some cases the syndrome can be fatal. transfusion associated graft versus host diseaseis a rare complication of blood transfusion, in which the donor T lymphocytes mount an immune response against the recipients lymphoid tissue. Donor lymphocytes are usually identified as foreign and destroyed by the recipients immune system. However, in situations where the recipient is immunocompromised, or when the donor is homozygous and the recipient is heterozygous for an HLA haplotype , the recipients immune system is not able to destroy the donor lymphocytes. This can result in graft versus host disease.autologous blood transfusion/autotransfusionInfusion of blood or blood products into the individual from whom they were originally withdrawn.fresh frozen plasma FFPan unconcentrated form of blood plasma containing all of the clotting factors except platelets. It can be used to supplement red blood cells when whole blood is not available for exchange transfusion or to correct a bleeding problem of unknown cause. It is also used to correct disseminated intravascular coagulation. fresh plasma FPa form of blood plasma which is obtained after FFP is melted at 4 and cryoprecipitate is removed.cryoprecipitate Cryo A product derived from a unit of whole blood, which has a volume of 15 ml and provides 80 units of factor VIII:C procoagulantfor hemophilia A, factor VIII:vWFvon Willebrands disease, factor XIII, fibronectin, fibrinogenfor DIC, dysfibrinogenemia異常纖維蛋白原血癥.It is the unmelted element of FFP under 4.plasma substitute/plasma volume expandera substance that can be transfused to maintain fluid volume of the blood in event of great necessity, supplemental to the use of whole blood and plasma. Called also artificial plasma extender.shockShock is a medical emergency in which the organs and tissues of the body are not receiving an adequate flow of blood. This deprives the organs and tissues of oxygen (carried in the blood) and allows the buildup of waste products.Causal factors include hemorrhage, vomiting, diarrhea, inadequate fluid intake, or excessive fluid loss, resulting in hypovolemia. Shock can result in serious damage or even death.hypovolemic shockThis is a common type that happens when blood or plasma is lost in such quantities that the remaining blood cannot fill the circulatory system despite constriction of the blood vessels. The blood loss may be external, as when a vessel is severed by an injury, or the blood may be “l(fā)ost” into spaces inside the body where it is no longer accessible to the circulatory system, as in severe gastrointestinal bleeding from ulcers, fractures of large bones with hemorrhage into surrounding tissues, or major burns that attract large quantities of blood fluids to the burn site outside blood vessels and capillaries. hemorrhagic shockHypovolemic shock resulting from acute hemorrhage and characterized by hypotension, tachycardia心動過速, oliguria少尿, and by pale, cold, and clammy skin. traumatic shockrefers to shock following physical trauma, with hemorrhage, peripheral blood vessel dilation, and changes in capillary permeability.septic shockshock associated with overwhelming infection, usually by gram-negative bacteria, although it may be produced by other bacteria, viruses, fungi, and protozoa. It is thought to result from the action of endotoxins or other products of the infectious agent.warm shockreferring to a stage in early septic shock, which is characterised by increased cardiac output, arterial and arteriolar小動脈的 dilatation擴(kuò)張, decreased peripheral arterial resistance阻力, increased peripheral perfusion灌注, no fluid losses and third spacing and minimal catecholamine兒茶酚胺 effectcold shockMODS the presence of altered organ function in acutely ill patients such that homeostasis cannot be maintained without intervention. It usually involves two or more organ systems.CVP the pressure of blood in the right atrium. Measurement of central venous pressure is made possible by the insertion of a catheter through the median cubital vein to the superior vena cava.The normal range for CVP is 0 to 5 mm H2O. A reading of 15 to 20 mm usually indicates inability of the right atrium to accommodate the current blood volumePCWPAn indirect indication of left atrial pressure obtained by wedging a catheter into a small pulmonary artery tightly enough to block flow from behind and thus to sample the pressure beyond.CO cardiac output the effective volume of blood expelled by either ventricle of the heart per unit of time (usually per minute).It is equal to the stroke volume multiplied by the heart rate. Normal values are 4 to 6 liters per minute.CI cardiac indexcardiac output per unit time divided by body surface area.Its normal range in a healthy adult is 2.5 to 3.5 L/min/m2. CAISa complex pattern of immunologic responses to severe infection or injury. CARS is a global deactivation of the immune system tasked with restoring homeostasis.ARF acute renal failurerenal failure of sudden onset, such as from physical trauma, infection, inflammation, or toxicity. Symptoms include uremia and usually oliguria or anuria, with hyperkalemia and pulmonary edema. Three types are distinguished: prerenal, intrarenal, and postrenal.ARDS acute respiratory ditress syndrome is a lung condition that leads to low oxygen levels in the blood. ARDS can be life threatening. This is because bodys organs, such as the kidneys and brain, need oxygen-rich blood to work properly.ARDS usually occurs in people who are very ill with another disease or who have major injuries. acute gastrointestinal dysfunctionis an acute gastrointestinal pathological condition with gastrointestinal mucosa damage, motor and barrier dysfunction.See in trauma, burn, shock etc.oliguriaa diminished capacity to form and pass urine-less than 400 mL in every 24 hours-so that the end products of metabolism cannot be excreted efficiently. It is usually caused by imbalances in body fluids and electrolytes, renal lesions, or urinary tract obstruction.anuriathe absence of urine production or a urinary output of less than 100 mL per day. Anuria may be caused by a failure or kidney dysfunction, a decline in blood pressure below that required to maintain filtration pressure in the kidney, or an obstruction in the urinary passages.azotemiaretention of excessive amounts of nitrogenous compounds in the blood. This toxic condition is caused by failure of the kidneys to remove urea from the blood and is characteristic of uremia. uremiathe presence of excessive amounts of urea and other nitrogenous waste products in the blood, as occurs in renal failure.Manifestations include weakness, headache, confusion, vomiting, and coma, and in terminal chronic renal disease, purpura and epistaxis may be present. Uremia is caused by insufficient urinary excretion for any reason. VILL ventilator-induced lung injuryVentilator induced lung injury occurs when the lung is directly damaged by the action of mechanical ventilation, mainly volutrauma.AHF acute hepatic failurethe appearance of severe complications rapidly after the first signs of liver disease (such as jaundice), and indicates that the liver has sustained severe damage (loss of function of 80-90% of liver cells). The complications are hepatic encephalopathy and impaired protein synthesis.stress ulcerStress ulcers are single or multiple mucosal defects which can become complicated by upper gastrointestinal bleeding during the physiologic stress of serious illness. stress ulcers are found commonly in fundic mucosa胃粘膜 and can be located anywhere within the stomach and proximal duodenum.anesthesiathe condition of having sensation (including the feeling of pain) blocked or temporarily taken away. It is a pharmacologically induced and reversible state of amnesia, analgesia, loss of responsiveness, loss of skeletal muscle reflexes or decreased stress response, or all simultaneously. This allows patients to undergo surgery and other procedures without the distress and pain they would otherwise experience. inhalation anestheticsAn inhalational anaesthetic is a chemical compound possessing general anaesthetic properties that can be delivered via inhalation. Agents of significant contemporary clinical interest include volatile anaesthetic agents such as isoflurane, sevoflurane and desflurane, as well as certain anaesthetic gases such as nitrous oxide.MAC minimum alveolar concentrationThe MAC is the concentration of the vapour (measured as a percentage at 1 atmosphere, i.e the partial pressure) that prevents the reaction to a standard surgical stimulus (traditionally a set depth and width of skin incisions) in 50% of subjects. This measurement is done at steady state (assuming a constant alveolar concentration for 15 minutes), under the assumption that this allows for an equilibration between the gasses in the alveoli, the blood and the brain. MAC is accepted as a valid measure of potency of inhalational general anaesthetics because it remains fairly constant for a given species even under varying conditions.blood/gas partition coefficientthe ratio of concentrations of anesthetics in the blood and gas at equilibrium. it is used to discribe the dissolved quantity of one anesthetics in unit volume of ravenous anestheticsAn agent that produces anesthesia when injected into the bloodstream via venipuncture. Very often, this term is used to refer to general anesthesia, frequently required during surgery to promote total unconsciousness of a patient.muscle relaxantsSkeletal muscle relaxants are drugs that relax striated muscles (those that control the skeleton). They are a separate class of drugs from the muscle relaxant drugs used during intubations and surgery to reduce the need for anesthesia and facilitate bined anesthesia/balanced anesthesiaa highly variable technique of general anesthesia using narcotic麻醉的 analgesics止痛劑, muscle relaxation, and minimal inhalation agent and nitrous oxide to render the patient unconscious.this can summate the advantages but not the disadvantages of the individual components of the mixture. local anesthesiaLocal or regional anesthesia involves the injection or application of an anesthetic drug to a specific area of the body, as opposed to the entire body and brain as occurs during general anesthesia.hypersusceptibility高敏反應(yīng) a condition of abnormal susceptibility to poisons, infective agents, or agents that are entirely innocuous無害的 in the normal individualsurface anesthesialoss of feeling or sensation. Artificial anesthesia may be produced by a number of agents capable of bringing about partial or complete loss of sensation. It is induced to permit the performance of surgery or other painful procedures. nerve blockregional anesthesia by injection of anesthetics close to the appropriate nerve.spinal blockregional anesthesia by injection of a local anesthetic into the subarachnoid蛛網(wǎng)膜下的 space around the spinal cord.epidural blockthat produced by injection of the anesthetic into the extradural space, either between the vertebral spines or into the sacral hiatus 骶骨裂孔total spinal anesthesiaspinal anesthesia extensive enough to produce loss of sensation in all extracranial sensory roots. caudal blockanesthesia by injection of local anesthetic into the caudal or sacral canal.controlled hypotensionThe deliberate acute reduction of arterial blood pressure to reduce blood loss during surgery, either by pharmacological means or by presurgical withdrawal of blood which is returned to the circulation postsurgicallyhypothermiaa potentially fatal condition, occurs when body temperature falls below 95F (35C).EEC extracorporeal circulationor CPB cardiopulmonary bypass a technique that temporarily takes over the function of the heart and lungs during surgery, maintaining the circulation of blood and the oxygen content of the ensive care unit (ICU) a hospital unit in which is concentrated special equipment and specially trained personnel for the care of seriously ill patients requiring immediate and continuous attention .resuscitation revival methods that maintain vital signs for a person in cardiac or respiratory failure. Cardiac massage and artificial respiration techniques are employed, and fluid and acid-base imbalances are corrected.Cardiopulmonary cerebral resuscitation (CPCR), a basic emergency procedure for life support, consisting of artificial respiration and manual external cardiac massage. It is used in cases of cardiac arrest to establish effective circulation and ventilation in order to prevent irreversible cerebral damage resulting from anoxia and reestablish of heart and lung action.basic life support (BLS), fundamental emergency treatment consisting of cardiopulmonary resuscitation (CPR) or emergency cardiac care (ECC) that is provided until more precise medical treatment can begin.advanced life support (ALS), a higher level of