问题 问答题 简答题

试述消化性溃疡的基本病理改变。

答案

参考答案:

胃溃疡胃小弯侧、胃窦部多见。肉眼:溃疡通常只有一个,圆形或椭圆形,直径多在2.5cm以内;十二指肠溃疡多发生在球部,直径在1cm以内。溃疡边缘整齐,粘膜皱襞从溃疡向周围呈放射状,溃疡底部通常穿越粘膜下层,深达肌层。

镜下溃疡底大致由4层组织组成:炎性渗出物-中性粒细胞和纤维素渗出、坏死组织-红染,无结构的坏死物质、肉芽组织层-幼稚的纤维结缔组织,成纤维细胞,毛细血管较多,少许炎细胞浸润、瘢痕组织-由纤维组织组成,可发生玻璃样变性,其内可见小动脉壁内膜增厚,管腔变窄或有血栓形成。增殖性动脉内膜炎,使小动脉管壁增厚,在溃疡边缘常可看到粘膜肌层与肌层粘连、愈着。神经纤维断端呈小球状增生。

阅读理解

Hospital emergency rooms treat injured fingers all the time. Without treatment, a bad cut can lead to permanent damage. But how should a person know when a bleeding cut is serious enough to require medical attention?

Here are some tips from Dr. Martin Brown, chairman of the department of emergency at Inova Alexandria Hospital in Virginia.

1. Laceration (裂口)

The medical term for a cut or tear in the skin is a laceration.   小题1:  A long cut on a finger can likely be treated without a visit to a doctor if the wound is not very deep. However, if you have a short but deep laceration, you will need professional attention.

2. Fingertips cut off

Some injuries, like a fingertip that gets cut off, might even need surgery to repair.   小题2: More often, cutting down the bone is what is done because reattaching a fingertip is often not successful.

3. Bleeding

 小题3:  Small cuts usually produce what is known as venous (静脉的) bleeding. This means the blood flows steadily from the injury. The bleeding will often stop when pressure is put on the wound. In most cases holding direct pressure with a clean cloth for four to five minutes would do. But if a cut appears to be pumping blood out with some force, this may be a sign of arterial (动脉的) bleeding.   小题4: 

Finally, always keep this in mind: even a cut that does not require medical attention must be kept clean to prevent infection. Small cuts should be cleaned gently with clean water.   小题5: Then cover it with a clean, dry bandage.

A.How a wound bleeds can be a sign of how serious it is.

B.That requires a specialist to either cut down the bone or reattach the fingertip.

C.This kind of injury should be treated by a medical professional as soon as possible.

D.The first signs of this disease include difficulty opening the mouth.E. Use a washcloth to clean the area if the wound is dirty.

F. With a cut finger, holding the hand above the heart can reduce the loss of blood.

G. The length is usually not as important as the depth.

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