dissection


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Related to dissection: aortic dissection, Dissection of aorta

dissection

 [dĭ-sek´shun]
1. the act of dissecting.
2. a part or whole of an organism prepared by dissecting.
aortic dissection a dissecting aneurysm of the aorta; the usual site is the thoracic aorta. There are two types, classified according to anatomical location: Type A involves the ascending aorta; Type B originates in the descending aorta. Acute aortic dissection is often fatal within one month of onset. Surgical treatment may be delayed in aneurysms involving the descending aorta until the blood pressure has been controlled and edema and friability of the aorta are diminished. The usual course of treatment for an aneurysm of the ascending aorta is immediate surgery. The surgical procedure for either type is aimed at either repairing the intimal tear or removing the affected portion of the aorta. This may be done by suturing the separated aortic layers back together or by removing the damaged section of the aorta and replacing it with a synthetic graft.
axillary dissection (axillary lymph node dissection) surgical removal of axillary lymph nodes, done as part of radical mastectomy.
blunt dissection separation of tissues along natural lines of cleavage, by means of a blunt instrument or finger.
lymph node dissection lymphadenectomy.
lymph node dissection, retroperitoneal (RPLND) retroperitoneal lymphadenectomy.
sharp dissection separation of tissues by means of the sharp edge of a knife or scalpel, or with scissors.

dis·sec·tion

(di-sek'shŭn, dī-), Avoid the mispronunciation dī'sek-shŭn.
The act of dissecting.
Synonym(s): anatomy (3) [TA], necrotomy (1)

dissection

(dĭ-sĕk′shən, dī-)
n.
1. The act or an instance of dissecting.
2. Something that has been dissected, such as a tissue specimen under study.

dissection

Surgery The separation of tissues or of one tissue plane from another. See Aquadissection, Axillary dissection, Balloon dissection, Blunt dissection, Full axillary dissection, Low axillary dissection, Modified neck dissection, Neck dissection, Radical neck dissection, Selective neck dissection, Sharp dissection.

dis·sec·tion

(di-sek'shŭn)
The act of dissecting.
Synonym(s): anatomy (3) , necrotomy (1) .

dissection

1. Separation of tissues by cutting, teasing or blunt division.
2. The act of dissecting.
3. An anatomical preparation that has been dissected.

Dissection

A cut or divide.
Mentioned in: Aortic Dissection
References in periodicals archive ?
PCI was used in one case in addition to medical treatment, giving the presence of extensive dissection from the ostium of the right coronary artery with persistent pain.
Contrast CT demonstrated ruptured type B aortic dissection with massive right hemothorax [Figure 1].
Initially, the femoral artery approach for the SMA dissection stenting was attempted multiple times, but every time, the probe went into the false lumen of dissection as it was directed distally toward the descending aorta.
Ultrasound is readily available but has limited value in the diagnosis of carotid artery dissection, as it is only possible to visualize the mid-cervical carotid segments.
Cadaveric dissection is the traditional way of teaching anatomy after theoretical lessons and discussions on the atlas images (2).
The National, Heart, Lung, and Blood Institute (NHLBI) classification and the Thrombolysis in Myocardial Infarction (TIMI) flow grade classification were used to characterize the SCD lesions.4,5 The coronary segment involved with SCD was classified by the Bypass Angioplasty Revascularization Investigation (BARI) classification.6 The dissection length was divided into two groups: short (< 20mm) and long ([greater than or equal to] 20mm).
The differences in intraoperative hemorrhage following Valsalva were significantly higher in the cold dissection group than in the hot (bipolar) group (p=0.044; Table 1, Figure 1).
While uncomplicated type B dissection can usually be managed with conservative treatment, type A dissection is a surgical emergency.[10] With improving technology and convincing long-term outcomes in favor of thoracic endovascular aortic repair (TEVAR), there is growing consensus for TEVAR to be used for both complicated and uncomplicated Type B aortic dissection.[8],[11] After discharge, antihypertensive medicine was administered.
In Agnihotri and Sagoo's questionnaire, which questioned the acceptability of cadaveric dissection as a question, it was determined that this question was 19.66% yes, 66.66% no, 13.66% unanswered (11).
Vertebral artery dissection (VAD) may follow manipulation of the neck or a trauma but it can also occur spontaneously (5).