切り疵 is in several kokugos.

@@ -18 +18 @@
-<ke_inf>&rK;</ke_inf>
+<ke_inf>&sK;</ke_inf>
@@ -22 +22 @@
-<ke_inf>&iK;</ke_inf>
+<ke_inf>&sK;</ke_inf>

切り傷	123984	93.6%
切傷	8323	6.3%
切疵	84	0.1%
切り疵	0	0.0%
切り創	48	0.0%
キリキズ	283

切創	6104	4.4% Ideally "せっそう", but not always.

https://kotobank.jp/word/切傷・切疵-2030053

MacOS IME will not produce for me either of the variant kanji 疵 or 創.　Android gives, in this order:
切り傷　きりきず　切傷　切りきず　切り疵　キリキズ 切疵 切創.  Does not produce 切り創.

sankoku has 切り傷 and 切り疵, り required.

I would be happy to [sK] any of the [rK] forms, but they all seem to be officially attested somewhere(except maybe 切り創).

切り創 appears in quite a lot of book results, but there is an overlap with 切創 せっそう.  Technically 切創 can also be read きりきず.  This may be "prescriptively wrong" even if it was actively used. 

せっそう, which we have, seems to be [form] and/or medical, only applies to 創, and seems better off out by itself.

Both readings: 切創　
https://furigana.info/w/切創
切創　
読み方	割合
きりきず	85.7%
せっそう	14.3%

If even 10% of 切創 instances are read きりきず, that would make it the 3rd most popular kanji orthography for きりきず.

@@ -10 +10 @@
-<keb>切り創</keb>
+<keb>切傷</keb>
@@ -13,0 +14 @@
+<ke_inf>&rK;</ke_inf>
@@ -16 +17,10 @@
-<keb>切傷</keb>
+<keb>切疵</keb>
+<ke_inf>&rK;</ke_inf>
+</k_ele>
+<k_ele>
+<keb>切創</keb>
+<ke_inf>&iK;</ke_inf>
+</k_ele>
+<k_ele>
+<keb>切り創</keb>
+<ke_inf>&sK;</ke_inf>