Xiphoid process

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Xiphoid process
Xiphoid process frontal.png
Position of the xiphoid process (shown in red).
Gray116.png
Posterior surface of sternum. (Xiphoid process labeled at bottom.)
Latinprocessus xiphoideus
Gray'sp.121
MeSHXiphoid+Bone
TAA02.3.03.007
FMAFMA:7488
Anatomical terms of bone
 
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Xiphoid process
Xiphoid process frontal.png
Position of the xiphoid process (shown in red).
Gray116.png
Posterior surface of sternum. (Xiphoid process labeled at bottom.)
Latinprocessus xiphoideus
Gray'sp.121
MeSHXiphoid+Bone
TAA02.3.03.007
FMAFMA:7488
Anatomical terms of bone

The xiphoid process /ˈzɪfɔɪd/, or xiphisternum or metasternum, is a small cartilaginous process (extension) of the lower part of the sternum which is usually ossified in the adult human.

Structure[edit]

The xiphoid process is considered to be at the level of the 9th thoracic vertebra and the T6 dermatome.

Development[edit]

In newborn babies and young (especially slender) infants, the tip of the xiphoid process may be both seen and felt as a lump just below the sternal notch. By age 15 to 29, the xiphoid usually fuses to the body of the sternum with a fibrous joint. Unlike the synovial articulation of major joints, this is non-movable.

Variation[edit]

The xiphoid process can be naturally bifurcated, and sometimes perforated. These variances in morphology are inheritable, which can help group family members together when dealing with burial remains. These morphological differences pose no health risk, and are simply a difference in form.

In animals[edit]

In birds, the xiphoid process is a long structure, often following the direction of the carina.

Function[edit]

Much the way the first seven ribs articulate with the sternum, the cartilage in the celiac plexus joins on the xiphoid process, reinforcing it, and indirectly attaches the costal cartilage to the sternum.

Clinical significances[edit]

Pressure on the xiphoid process should be avoided when administering chest compressions in CPR, as this can cause the xiphoid process to break off, resulting in punctures or lacerations of the diaphragm. Additionally, the liver may be punctured, resulting in lethal hemorrhaging.

Xiphoidalgia (Xiphodynia) is a syndrome distinguishable by pain and tenderness to the sternum. While some sources describe this disorder as rare, others suggest it is relatively common but overlooked by physicians.[1] Symptoms can include abdominal pain, chest pain, nausea and radiating pain to the back, neck, and shoulders. Lifting heavy objects or trauma to the chest may be the cause of this musculoskeletal disorder and pain may be heightened by bending or twisting. Anesthetic and steroid injections are commonly employed to treat this medical condition.[2][dead link]

Pericardiocentesis, the procedure whereby fluid is aspirated from the pericardium, often uses the xiphoid process as an anatomical landmark by which this procedure is carried out.[3]

History[edit]

The word derives from the Greek word xiphos for straight sword, the tip of which the process somewhat resembles.

In 1712 was the first known case of a xiphoid disorder.[1]

Additional images[edit]

References[edit]

  1. ^ a b Xiphodynia: A diagnostic conundrum
  2. ^ major causes of musculoskeletal chest pain
  3. ^ Sam, Amir H.; James T.H. Teo (September 2010). Rapid Medicine. Wiley-Blackwell. ISBN 1-4051-8323-3. 

External links[edit]

This article uses anatomical terminology; for an overview, see anatomical terminology.