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典的艾伦试验的做法是：受检者握紧拳头，检查者同时紧压其腕部的桡动脉、尺动脉，这时受检者松开拳头，其手掌部由于血供被阻断变得苍白，然后继续压迫桡动脉．松开尺动脉恢复其血供，这时手掌应迅速（5s内）恢复红润，说明受检者的桡动脉、尺动脉间有完善的侧支循环，在桡动脉血供消失的条件下不影响手部血供，为艾伦试验阴性；反之，如果在5s内不能恢复红润，则为该试验阳性

Allen Iverson | 3 2005-06Statistics PPG RPG APG EFF + Position: G Born: Jun 7, 1975 Height: 6-0 / 1,83 Weight: 165 lbs. / 74,8 kg. College : Georgetown Served as a co-captain for Team USA at the 2004 Olympics in Athens, Greece, and led the team in scoring ( ppg) Feb. 19, 2004, vs. Seattle scored 40 points in a game for the 50th time Named an Eastern Conference All-Star starter in 2004 for the 5th year in a row (2000-04) 10th fastest player to reach 14,000 points on Jan. 23, 2004 Averaged points and assists per game helping USA Basketball Men's Senior National team qualify for the 2004 Olympics Named the 2000-01 NBA Most Valuable Player, leading the league in scoring ( ppg) and steals ( spg) Most Valuable Player of the 2001 All-Star Game Three times selected All-NBA Second Team (2000, 2002, 2003) Two time first team All-NBA Team (1999, 2001) Named the 1996-97 Schick NBA Rookie of the Year, becoming the first 76ers player to ever win the award Set the Sixers all-time rookie record with 1,787 points Scored 40 points in five straight games in April 1997 to set an NBA rookie record Named MVP of the Schick Rookie Game during the 1997 NBA All-Star Weekend, posting 19 points and a game-high 9 assists Named NBA Rookie of the Month for November, 1997, leading all rookies in scoring ( ppg), assists ( apg) and steals ( spg) Entering 10th season with the 76ers. Only one active player has played with only one team for a longer period of time (Kevin Garnett, MIN). Finished the 2004-05 season with 2,302 points, marking the second highest single-season scoring total in franchise history (1965-66, Wilt Chamberlain, 2,649). Captured his fourth scoring title ( ppg) in 2004- 05, joining Wilt Chamberlain (7 times), Michael Jordan (10 times) and George Gervin (4 times) as the only players in NBA history to capture four or more scoring titles ( ppg in 2001-02, ppg in 2000-01 and ppg in 1998-99). Voted MVP of the 2005 NBA All-Star Game after finishing with 15 points, nine assists and four steals in his sixth-straight All-Star Game as a starter for the Eastern Conference. Also was named MVP of the 2001 NBA All-Star Game. Finished fifth in the voting for 2004-05 NBA Most Valuable Player behind 2005 Most Valuable Player Steve Nash (Phoenix), Shaquille O’Neal (Miami), Dirk Nowitzki (Dallas) and Tim Duncan (San Antonio). Three-time first team All-NBA selection (1999, 2001, 2005) and three-time second-team All-NBA selection (2000, 2002 and 2003). Averaged a 2005 NBA Playoff-high points per game against Detroit in the First Round. In 62 career playoff games, has averaged points per game, the second highest scoring average in NBA Playoff history behind only Michael Jordan ( ppg). In Game 3 of the 2005 First Round matchup with Detroit, finished with 37 points and 15 assists becoming the fourth player in NBA Playoff history to have 35 or more points and 15 or more assists in a game joining John Bagley (Boston), Walt Frazier (New York) and Jerry West (. Lakers, twice). Tied the fourth-best single-game Playoff assists total in franchise history in Game 3 (4/29/05 vs. DET), finishing with 15 assists. Became the second player in franchise history (Wilt Chamberlain, 3 times) to score 60 or more points in a game when he dropped a career-high 60 points vs. Orlando (2/12). Became the seventh player in NBA history to score 50 or more points in consecutive games, joining Rick Barry, Elgin Baylor, Wilt Chamberlain, Antawn Jamison, Michael Jordan and Bernard King. During his career has scored 50 or more points nine times during the regular season (6-3). Became the first player in NBA history since steals have been recorded (1973-74) to finish in the top-5 in scoring ( ppg), steals (), and assists (). Hosts the Allen Iverson Celebrity Classic during the off-season, a weekend that includes a celebrity softball game.

这个网址上讲得很详细。

Allen Ezail Iverson was born in Hampton, Virginia, on June 7, 1975. The son of Allen Broughton and Ann Iverson, his dad skipped out on the family and he and his sister Brandy were left in the care of their mother Ann. In 1991, Iverson, Brandy and their mother welcomed a new addition to the family, Leisha, who was ill, adding to the family bills. Iverson had a very poor childhood, one without the basic necessities like electricity, heat or water (a far cry from today, with hundreds of thousands of dollars worth of jewelry and a Mercedes, Range Rover and Bentley). His poor upbringing was one of his reasons for wanting to go pro earlier than expected.

ThemesLove and HatePoe explores the similarity of love and hate in many stories, especially “The Tell-Tale Heart” and “William Wilson.” Poe portrays the psychological complexity of these two supposedly opposite emotions, emphasizing the ways they enigmatically blend into each other. Poe’s psychological insight anticipates the theories of Sigmund Freud, the Austrian founder of psychoanalysis and one of the twentieth century’s most influential thinkers. Poe, like Freud, interpreted love and hate as universal emotions, thereby severed from the specific conditions of time and Gothic terror is the result of the narrator’s simultaneous love for himself and hatred of his rival. The double shows that love and hate are inseparable and suggests that they may simply be two forms of the most intense form of human emotion. The narrator loves himself, but when feelings of self-hatred arise in him, he projects that hatred onto an imaginary copy of himself. In “The Tell-Tale Heart,” the narrator confesses a love for an old man whom he then violently murders and dismembers. The narrator reveals his madness by attempting to separate the person of the old man, whom he loves, from the old man’s supposedly evil eye, which triggers the narrator’s hatred. This delusional separation enables the narrator to remain unaware of the paradox of claiming to have loved his vs. Alter EgoIn many of Poe’s Gothic tales, characters wage internal conflicts by creating imaginary alter egos or assuming alternate and opposite personalities. In “William Wilson,” the divided self takes the form of the narrator’s imagined double, who tracks him throughout Europe. The rival threatens the narrator’s sense of a coherent identity because he demonstrates that it is impossible for him to escape his unwanted characteristics. The narrator uses the alter ego to separate himself from his insanity. He projects his inner turmoil onto his alter ego and is able to forget that the trouble resides within him. The alter ego becomes a rival of the self because its resemblance to the self is unmistakable. Suicide results from the delusion that the alter ego is something real that can be eliminated in order to leave the self in peace. In “The Black Cat” the narrator transforms from a gentle animal lover into an evil cat-killer. The horror of “The Black Cat” derives from this sudden transformation and the cruel act—the narrator’s killing of his cat Pluto—which accompanies it. Pluto’s reincarnation as the second cat haunts the narrator’s guilty conscience. Although the narrator wants to forget his murder of Pluto, gallows appear in the color of his fur. The fur symbolizes the suppressed guilt that drives him insane and causes him to murder his Power of the Dead over the LivingPoe often gives memory the power to keep the dead alive. Poe distorts this otherwise commonplace literary theme by bringing the dead literally back to life, employing memory as the trigger that reawakens the dead, who are usually women. In “Ligeia,” the narrator cannot escape memories of his first wife, Ligeia, while his second wife, the lady Rowena, begins to suffer from a mysterious sickness. While the narrator’s memories belong only to his own mind, Poe allows these memories to exert force in the physical world. Ligeia dies, but her husband’s memory makes him see her in the architecture of the bedroom he shares with his new wife. In this sense, Gothic terror becomes a love story. The loving memory of a grieving husband revives a dead wife. “Ligeia” breaks down the barrier between life and death, but not just to scare the reader. Instead, the memory of the dead shows the power of love to resist even the permanence of death. Motifs The MasqueradeAt masquerades Poe’s characters abandon social conventions and leave themselves vulnerable to crime. In “The Cask of Amontillado,” for -example, Montresor uses the carnival’s masquerade to fool Fortunato into his own demise. The masquerade carries the traditional meanings of joy and social liberation. Reality is suspended, and people can temporarily assume another identity. Montresor exploits these sentiments to do Fortunato real harm. In “William Wilson,” the masquerade is where the narrator receives his double’s final insult. The masquerade is enchanting because guests wear a variety of exotic and grotesque costumes, but the narrator and his double don the same Spanish outfit. The double Wilson haunts the narrator by denying him the thrill of unique transformation. In a crowd full of guests in costumes, the narrator feels comfortably anonymous enough to attempt to murder his double. Lastly, in “The Masque of the Red Death,” the ultimate victory of the plague over the selfish retreat of Prince Prospero and his guests occurs during the palace’s lavish masquerade ball. The mysterious guest’s gruesome costume, which shows the bloody effects of the Red Death, mocks the larger horror of Prospero’s party in the midst of his suffering peasants. The pretense of costume allows the guest to enter the ball, and bring the guests their death in person. AnimalsIn Poe’s murder stories, homicide requires animalistic element. Animals kill, they die, and animal imagery provokes and informs crimes committed between men. Animals signal the absence of human reason and morality, but sometimes humans prove less rational than their beastly counterparts. The joke behind “The Murders in the Rue Morgue” is that the Ourang-Outang did it. The savage irrationality of the crime baffles the police, who cannot conceive of a motiveless crime or fathom the brute force involved. Dupin uses his superior analytical abilities to determine that the crime couldn’t have been committed by a human. In “The Black Cat,” the murder of Pluto results from the narrator’s loss of reason and plunge into “perverseness,” reason’s inhuman antithesis. The story’s second cat behaves cunningly, leading the narrator into a more serious crime in the murder of his wife, and then betraying him to the police. The role reversal—irrational humans vs. rational animals—indicates that Poe considers murder a fundamentally animalistic, and therefore inhuman, act. In “The Tell-Tale Heart,” the murderer dehumanize his victims by likening him to animal. The narrator of “The Tell-Tale Heart” claims to hate and murder the old man’s “vulture eye,” which he describes as “pale blue with a film over it.” He attempts to justify his actions by implicitly comparing himself to a helpless creature threatened by a hideous scavenger. In the “Cask of Amontillado,” Montresor does the reverse, readying himself to commit the crime by equating himself with an animal. In killing Fortunato, he cites his family arms, a serpent with its fangs in the heel of a foot stepping on it, and motto, which is translated “no one harms me with impunity.” Fortunato, whose insult has spurred Montresor to revenge, becomes the man whose foot harms the snake Montresor and is punished with a lethal WhirlpoolIn “MS. Found in a Bottle,” the whirlpool symbolizes insanity. When the whirlpool transports the narrator from the peaceful South Seas to the surreal waters of the South Pole, it also symbolically transports him out of the space of scientific rationality to that of the imaginative fancy of the German moralists. The whirlpool destroys the boat and removes the narrator from a realistic realm, the second whirlpool kills “The Tell-Tale Heart,” the narrator fixates on the idea that an old man is looking at him with the Evil Eye and transmitting a curse on him. At the same time that the narrator obsesses over the eye, he wants to separate the old man from the Evil Eye in order to spare the old man from his violent reaction to the eye. The narrator reveals his inability to recognize that the “eye” is the “I,” or identity, of the old man. The eyes symbolize the essence of human identity, which cannot be separated from the body. The eye cannot be killed without causing the man to die. Similarly, in “Ligeia,” the narrator is unable to see behind Ligeia’s dark and mysterious eyes. Because the eyes symbolize her Gothic identity, they conceal Ligeia’s mysterious knowledge, a knowledge that both guides and haunts the narrator. “Fortunato”In “The Cask of Amontillado,” Poe uses Fortunato’s name symbolically, as an ironic device. Though his name means “the fortunate one” in Italian, Fortunato meets an unfortunate fate as the victim of Montresor’s revenge. Fortunato adds to the irony of his name by wearing the costume of a court jester. While Fortunato plays in jest, Montresor sets out to fool him, with murderous results.

恩 可以哦~！

艾伦试验（Allen试验），检查手部的血液供应，桡动脉与尺动脉之间的吻合情况。

方法步骤：

术者用双手同时按压桡动脉和尺动脉；

嘱患者反复用力握拳和张开手指5～7次至手掌变白；

松开对尺动脉的压迫，继续保持压迫桡动脉，观察手掌颜色变化。

若手掌颜色10秒之内迅速变红或恢复正常，表明尺动脉和桡动脉存在良好的侧支循环，即Allen试验阳性，可以经桡动脉进行穿刺，若桡动脉发生闭塞也不会出现缺血；相反，若10秒手掌颜色仍为苍白，Allen试验阴性，这表明手掌侧支循环不良，不应选择桡动脉进行穿刺。

扩展资料：

改良艾伦试验方法

20世纪50年代初Wright在传统Allen试验基础上提出了改良Allen试验方法，以更方便评价手掌双侧血供。改良Allen试验做法：同时压迫受检者一侧尺动脉和桡动脉，举手过心脏水平后（以防止手臂静脉瓣功能不全造成Allen试验假阳性结果）。

患者做伸握拳动作至大鱼际肌红色消退，放开尺动脉压迫，观察手掌部颜色由白变红时间，恢复时间10秒以内，表明尺动脉畅通和掌弓循环良好，Allen试验阳性；反之尺动脉可能堵塞或掌弓循环欠佳，Allen试验阴性。

此种方法大大简化了传统操作，但是它也存在一些问题：如手掌松开时手掌过伸，可能会引起掌弓循环血供减少，造成Allen试验“假阴性”；另外压迫尺动脉可能会在动脉减压后引起短暂的反射性扩张所造成Allen试验“假阳性”。

针对动脉反射性扩张问题，有学者采用另外一种改良Allen试验操作方法：术者只压迫患者桡动脉，患者举手过心脏水平，并连做握拳动作数次，然后紧紧握拳，测试者继续压迫桡动脉让患者将手下垂，并自然伸开手。观察手掌部颜色由白转红的时间。

若尺动脉畅通和掌弓循环良好，转红的时间多在3秒左右，在6秒钟以内转红为Allen试验阳性，若在7～15秒钟转红，说明尺动脉血供延迟，称为Allen试验可疑。

如果15秒以上仍不转红说明尺动脉血供有障碍，即Allen试验阴性，桡动脉不宜采用。目前临床所指Allen试验就是改良Allen试验，所应用操作方法为前一种——同时压迫桡、尺动脉。

参考资料来源：百度百科-Allen试验

参考资料来源：维普网-改良Allen试验