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首頁(yè) > 美迪醫(yī)訊 > 最新修補(bǔ)心臟缺損的方法 |
最新修補(bǔ)心臟缺損的方法 【?2007-06-05 發(fā)布?】 美迪醫(yī)訊
一種新創(chuàng)的導(dǎo)管技術(shù)修補(bǔ)心臟的缺損可能使得許多病人避免手術(shù)成為可能,以使這些病人重新獲得足夠的力氣并在隨后的日子里安全接受手術(shù)修復(fù)奠定了基礎(chǔ)。 美國(guó)的一個(gè)研究小組評(píng)價(jià)了1995到2000年10例無(wú)室性隔膜缺損(VSD)接受修補(bǔ)的病人。在所有的這些按例中VSD修補(bǔ)都是失敗的,使得部分血液隨著心跳由左心室通過(guò)捷徑回到了右心室,而不是循環(huán)到身體的其他部分。但接受修補(bǔ)的操作過(guò)程在所有病例中都獲得了成功,沒(méi)有并發(fā)癥。一例病人因?yàn)榻K末疾病死亡而與VSD修補(bǔ)無(wú)關(guān);2例病人破損并未完全解決,致使血液經(jīng)過(guò)窄的開(kāi)口處后受到破壞。還有一個(gè)病人因?yàn)榧?xì)菌感染在使用輔助儀器后幾個(gè)月后去世。 而接受新的治療方法后,平均過(guò)了一年后,病人感覺(jué)明顯好轉(zhuǎn)并且活動(dòng)明顯增加,即使在喘氣前也能進(jìn)行攀爬的活動(dòng)。所有的研究對(duì)象被紐約心臟協(xié)會(huì)定義為2級(jí)或更好。這項(xiàng)研究在第30次心血管血管成像年會(huì)上作了展示。本次會(huì)議于2007年5月在美國(guó)的奧蘭多舉行。 急性VSD病人可能由于心衰造成嚴(yán)重的疾患甚至造成心源性的休克。第一作者M(jìn)atthew W. Martinez博士解釋說(shuō)。他的這種新的治療方案可能成為太虛弱以至不能立刻進(jìn)行心臟手術(shù)的病人或是僅僅不愿意接受手術(shù)的病人的另一種選擇。 本研究所涉及的VSD檔板由兩層圓盤通過(guò)一根厚軸連接。這兩層圓盤由可延展的鎳合金制成并由多脂覆蓋以引導(dǎo)心臟組織生長(zhǎng)并覆蓋于其上,治療的過(guò)程中可使心臟組織完全覆蓋于圓盤上。 可延展的雙圓盤修補(bǔ)片通過(guò)一條導(dǎo)管,經(jīng)過(guò)一條靜脈從右心室通過(guò)缺損處進(jìn)入左心室。 直到第一個(gè)圓盤頂端展開(kāi)這個(gè)修補(bǔ)裝置才會(huì)部分從導(dǎo)管鞘中伸出。導(dǎo)管隨后從右心室撤回。當(dāng)?shù)谝粋€(gè)圓盤貼在左心室壁,而連接兩個(gè)圓盤的桿狀物填滿由破損造成的孔洞時(shí),第二個(gè)圓盤在右心室打開(kāi),覆蓋缺損在有側(cè)心室的一面。 來(lái)源:medinews.com Novel Occluder Patches Holes in the Heart A novel catheter technique for patching holes in the heart may make it possible for many patients to avoid surgery altogether and others to regain enough strength to safely undergo surgical repair at a later date, according to a new study. Researchers at the Mayo Clinic (Rochester, MN, USA) reviewed the medical records of 10 patients treated with aventricular septal defect (VSD) patch between 1995 and 2005. In all cases, the VSD patch was failing, allowing a portion of the blood in the left ventricle to shoot backward into the right ventricle with each heart beat, rather than being circulated to the rest of the body. All patients were implanted with a VSD occluder, and the procedure was successful in all patients, without complications. One patient died five days later of illness unrelated to the VSD patch. In two patients, the rupture did not fully heal, causing damage to blood cells as they jetted through the narrow opening. A third patient developed a bacterial infection that started several months after device implantation. The patch was removed and all three patients had successful surgery to repair the rupture. After a follow-up that averaged more than one year, patients were feeling markedly better and were much more active, even able to climb a flight of stairs before becoming short of breath. All patients were ranked in New York Heart Association class 2 or better. The study was presented at the 30th annual scientific sessions of the society for cardiovascular angiography and interventions, held during May 2007 in Orlando (FL, USA). patients with acute VSDs may be critically ill with heart failure and perhaps be in cardiogenic shock,?said lead author Matthew W. Martinez, M.D., a cardiology fellow at the Mayo Clinic. 揟his procedure offers an alternative for patients who are too sick to undergo emergency heart surgery or simply don’t want surgery.? The VSD occluder is composed of two discs connected by a thick shaft. The discs are made of flexible nitinol metal and covered in polyester fabric that encourages heart tissue to grow over them, completely covering them during healing. The flexible double-disc patch is pulled into a catheter, collapsing and compressing it lengthwise. It is then threaded through a vein into the right ventricle and across the rupture into the left ventricle. The patch is pushed partially out of its catheter sheath until the first disc pops open. The catheter is then withdrawn back into the right ventricle, with the first disc positioned against the left ventricular wall and the connecting shaft filling the hole created by the rupture. From inside the right ventricle, the patch is pushed forward again, releasing the second disc, which covers the rupture on the right side of the heart. 本文關(guān)鍵字:
修補(bǔ)心臟的缺損
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