A text-book of first aid and emergency treatment . severely injured, this condition being known aslaceration of the brain. These conditions, together withconcussion, are sometimes spoken of as intracranial injury,a rather loose diagnosis which indicates simply that the brainhas been injured, without designating the particular type ofinjury present. After a blow on the head the first-aid worker isinterestedchiefly in deciding whether there have been any serious conse- 196 REGION A L I .\J URIES qiicnces or wliether the condition is sini])U concussion whichwill (juickly i)ass away. In most hospi
A text-book of first aid and emergency treatment . severely injured, this condition being known aslaceration of the brain. These conditions, together withconcussion, are sometimes spoken of as intracranial injury,a rather loose diagnosis which indicates simply that the brainhas been injured, without designating the particular type ofinjury present. After a blow on the head the first-aid worker isinterestedchiefly in deciding whether there have been any serious conse- 196 REGION A L I .\J URIES qiicnces or wliether the condition is sini])U concussion whichwill (juickly i)ass away. In most hospitals it is made a standini; Iulc to keep everyhead injury under observation for several hours, to lie cer-tain that no serious injury is present. Symptoms.—^^he mildest cases show only concussion withsymptoms which clear up within a few minutes. INIoresevere cases show the symptoms of ordinary concussionwhich, instead of clearinu; up, persist for several cases should be watched very closely for evidencesof compression of the Fig. 128.—Cross-section of the head showing hemorrhaKe between the skulland brain, a result of a blow on the skull without fracture. (Ashhurst.) If the injury to the skull results in the rupture of a blood-vessel in the brain the patient at first shows symptoms ofconcussion which may entirely disappear within a few min-utes. As the torn vessel slowly bleeds, the escaped blood,held within the firm bony cavity of the skull, causes gradu-ally increased pressure which makes itself evident in uncon-sciousness, deep stertorous respiration, irregular heart action,and possibly death. This is known as compression of thebrain, and is very similar to apoplexy. If the hemorrhagein the brain is from a very small vessel the secondary symp- EYE 197 toms of compression may not occur for several hours afterthe injury. In laceration of the brain, unconsciousness occurs at onceand lasts for a long. time. The intermediate stage of completeconsciousness
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