ASN's Mission

To create a world without kidney diseases, the ASN Alliance for Kidney Health elevates care by educating and informing, driving breakthroughs and innovation, and advocating for policies that create transformative changes in kidney medicine throughout the world.

learn more

Contact ASN

1401 H St, NW, Ste 900, Washington, DC 20005

email@asn-online.org

202-640-4660

The Latest on X

Kidney Week

Abstract: TH-PO301

A Single-Center Study of the Appropriate Timing of Chest X-Rays in Hemodialysis Patients

Session Information

Category: Dialysis

  • 801 Dialysis: Hemodialysis and Frequent Dialysis

Authors

  • Ahn, Jeongmyung, BongSeng Memorial Hospital, Busan, Korea (the Republic of)
  • Lee, A. Rim, BongSeng Memorial Hospital, Busan, Korea (the Republic of)
  • Nam Sik, Kim, BongSeng Memorial Hospital, Busan, Korea (the Republic of)
  • Kim, Yanghyeon, BongSeng Memorial Hospital, Busan, Korea (the Republic of)
  • Kim, Hee yeoun, BongSeng Memorial Hospital, Busan, Korea (the Republic of)
  • Oh, Joon Seok, BongSeng Memorial Hospital, Busan, Korea (the Republic of)
  • Kim, Joong Kyung, BongSeng Memorial Hospital, Busan, Korea (the Republic of)
Background

To determine dry weight, the most commonly method is bioimpedance and relative plasma volume(RPV) monitoring. However the cardiothoracic ratio(ct ratio) of chest PA is still a common method of setting the dry weight. It is not clear when to perform chest PA. So chest PA is conducted at the convenience of patients and medical staff regardless of dialysis. We hypothesis that the ct ratio before dialysis would be different from that when the appropriate dry weight was reached.

Methods

We analyzed 211 hemodialysis patients at our hospital from December 1 to 10, 2022. We took chest PA in patients before hemodialysis on Monday or Tuesday, the beginning of the week(Pre-HD ct ratio). When our patients had been considered euvolemia and reached dry weight after hemodialysis during the week, we additionally performed a chest PA test and evaluated the ct ratio(Post-HD ct ratio). Using SPSS ver. 18, we compared the ct ratio of chest PA before and after dialysis. We analyzed the correlation between the difference in the ct ratio of chest PA and the difference between weight and dry weight at the time of the test.

Results

There was a significant difference between the Pre-HD ct ratio(0.513 ± 0.058) and the Post-HD ct ratio(0.491 ± 0.060, P < 0.05). The difference in the ct ratio of the chest PA was correlated with the difference between weight and dry weight. However, differences in ct ratio were not related to gender, age, primary disease, dialysis period, and previous RRT methods.

Conclusion

There was a difference in the ct ratio of chest PA before and after dialysis. As the patient's weight approached the dry weight, the ct raito of the chest PA decreased. We concluded that the appropriate time to administer chest PA was after the patient's weight reached dry weight.