Investigation of prognostic factors for post-traumatic olfactory dysfunction

La, Fan; Kuo, Chin Lung; Lirng, Jiing Feng; Shu, Chih Hung

doi:10.1016/j.jcma.2014.11.009

Cited by 15 publications

(13 citation statements)

References 13 publications

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“…It has been estimated that approximately 1/3 of patients with posttraumatic anosmia may experience some degree of spontaneous recovery [40,77,78]. A recent retrospective study reported that only 17% showed improvement, however in this study the earliest testing was at 4 months when patients who had previous dysfunction may have already recovered [79]. In most cases of posttraumatic injury if recovery is to occur it is usually observed within 6 months to a year following injury [75,80].…”

Section: Prognosismentioning

confidence: 82%

Posttraumatic olfactory dysfunction

Coelho

Costanzo

2016

Auris Nasus Larynx

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Section: Prognosismentioning

confidence: 82%

Posttraumatic olfactory dysfunction

Coelho

Costanzo

2016

Auris Nasus Larynx

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“…Depending on the study, the incidence of posttraumatic olfactory dysfunction has been reported from 5% to over 80%. Nasal bone fractures can lead to complete or partial loss of olfactory function despite adequate reduction [ 11 12 13 14 15 16 17 18 19 23 ].…”

Section: Discussionmentioning

confidence: 99%

“…However, the vast majority of nasal bone fractures are treated by closed reduction with rates of successful reduction ranging between 70% and 95% [ 1 5 7 8 9 10 ]. Posttraumatic olfactory dysfunction is a recognizable concern in these patients [ 11 12 13 14 15 16 17 18 19 ]. The decline in olfactory function can be caused by disruption of sinus tract, olfactory nerve injury, injury to the connections between central olfactory structures as well as indirect airflow disturbance by factors associated with operation such as packing material [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

“…The decline in olfactory function can be caused by disruption of sinus tract, olfactory nerve injury, injury to the connections between central olfactory structures as well as indirect airflow disturbance by factors associated with operation such as packing material [ 16 ]. Olfactory impairment as a result of nasal bone fracture may range from hyposmia (decrease in odor detection ability) to anosmia (inability to detect odors) [ 13 14 16 ]. In this study, we evaluate olfactory function in patients with nasal fracture before and after closed reduction.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Olfactory Dysfunction in Nasal Bone Fracture

Kim

Park

Lee

et al. 2017

Arch Craniofac Surg

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BackgroundAll nasal bone fractures have the potential for worsening of olfactory function. However, few studies have studied the olfactory outcomes following reduction of nasal bone fractures. This study evaluates posttraumatic olfactory dysfunction in patients with nasal bone fracture before and after closed reduction.MethodsA prospective study was conducted for all patients presenting with nasal bone fracture (n=97). Each patient consenting to the study underwent the Korean version of Sniffin' Sticks test (KVSS II) before operation and at 6 month after closed reduction. The nasal fractures were divided according to the nasal bone fracture classification by Haug and Prather (Types I–IV). The olfactory scores were compared across fracture types and between preoperative and postoperative settings.ResultsOlfactory dysfunction was frequent after nasal fracture (45/97, 46.4%). Our olfactory assessment using the KVSS II test revealed that fracture reduction was not associated with improvements in the mean test score in Type I or Type II fractures. More specifically, the mean posttraumatic Threshold, discrimination and identification score decreased from 28.8 points prior to operation to 23.1 point at 6 months for Type II fracture with septal fracture.ConclusionOur study has revealed two alarming trends regarding post-nasal fracture olfactory dysfunction. First, our study demonstrated that almost half (46.4%) of nasal fracture patients experience posttraumatic olfactory dysfunction. Second, closed reduction of these fractures does not lead to improvements olfaction at 6 months, which suggest that olfactory dysfunction is probably due to factors other than the fracture itself. The association should be further explored between injuries that lead to nasal fracture and the mechanism behind posttraumatic olfactory dysfunction.

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“…Following onset, fluctuation in function is infrequent and patients are often affected by phantosmia (and to a lesser degree, by parosmia) (89,113,114) . Evidence from several studies suggests that recovery is less frequent than in postinfectious loss and whilst prognosis is often poor, recovery may occur in approximately 30% of cases over time depending on the severity of the insult (94,97,(115)(116)(117)(118) .…”

Section: Posttraumatic Olfactory Dysfunctionmentioning

confidence: 99%